Chinook Salmon (Oncorhynchus tshawytscha): COSEWIC assessment and status report 2018: page 4
Appendix 1. IUCN threat calculator tables for some designatable unit
Threats assessment worksheet
- Species or ecosystem scientific name:
- Oncorhynchus tshawytscha - Chinook Salmon
- Element ID:
- DU2 - Lower Fraser, Ocean, Fall population
- Date:
- 22/02/2017
- Assessor(s):
- Originally assessed by Brian O. Ma in November, 2014. Revised in February 2017 at a workshop and in December 2018 following assessment. Workshop attendees: Steve Baillie, Richard Bailey, Gayle Brown, Carolyn Churchland, Roger Gallant, Wilf Luedke, Cheryl Lynch, Jason Mahoney, Arlene Tompkins, Nicole Trouton, Greg Wilson, John Neilson (Marine Fishes SSC Co-chair), David Fraser (Facilitator), Bev McBride (COSEWIC Secretariat)
- References:
- (Porter et al. 2013; Riddell et al. 2013; Brown et al. 2013, Pre-COSEWIC report, in-prep); Expert opinion from group identified above.
| Threat impact (descriptions) | Level 1 Threat impact counts: high range |
Level 1 Threat impact counts: low range |
|---|---|---|
| A (Very high) | 0 | 0 |
| B (High) | 0 | 0 |
| C (Medium) | 3 | 3 |
| D (Low) | 4 | 4 |
| Calculated overall threat impact: | High | High |
- Assigned overall threat impact:
- B = High
- Impact adjustment reasons:
- Not applicable
- Overall threat comments:
- We assigned an overall impact rating of B (High). This rating was predominantly based on harvest and marine survival rate, while most other threats could not be assigned a severity rating. The indicator stock suggests that this DU has a 30 to 40 percent exploitation rate since 1995 (Riddell et al. 2013). Riddell et al. (2013) note that sustainable harvest is strongly tied to stock productivity. Stock productivity in the early 2000s has been lower than historical numbers, which may make the populations within the DU more susceptible to increases in harvest. However, stock productivity has increased since 2005, which may be linked to the increase in marine survival rate. Most sensitive of any conservation units to loss of wetlands in the estuary. Dec. 11th (JDN revised overall threat to High, consistent with Dwayne Lepitzki's comments that rollup was incorrect).
| Number | Threat | Impact (calculated) |
Scope (next 10 Yrs) |
Severity (10 Yrs or 3 Gen.) |
Timing | Comments |
|---|---|---|---|---|---|---|
| 1 | Residential and commercial development | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Low (Possibly in the long term, >10 yrs/3 gen) | Not applicable |
| 1.1 | Housing and urban areas | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Low (Possibly in the long term, >10 yrs/3 gen) | Urban develop is considered to be negligible in the land-based area of this DU (0.61 percent) (Porter et al. 2013). This urbanization is expected to continue at a low rate of timing because the DU area is surrounded by mountain ridge, but the severity of urbanization on Chinook salmon is unknown. |
| 1.2 | Commercial and industrial areas | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | Booming ground in one of the holding areas but has always been there; lower Fraser concerns; |
| 1.3 | Tourism and recreation areas | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Low (Possibly in the long term, >10 yrs/3 gen) | None. Jet boat central - suck fry through (this will come under recreational activities) |
| 2 | Agriculture and aquaculture | Unknown | Pervasive (71-100 percent) | Unknown | Moderate (Possibly in the short term, < 10 yrs/3 gen) | Not applicable |
| 2.1 | Annual and perennial non-timber crops | Unknown | Pervasive (71-100 percent) | Unknown | Moderate (Possibly in the short term, < 10 yrs/3 gen) | Agricultural develop is considered at small scope (1.3 percent of the land-based area is agricultural) (Porter et al. 2013) and is expected to continue at a moderate rate. However, the severity of agricultural land on Chinook salmon is unknown. DU2: Cranberry and blueberry farms - farm development is increasing (impression). Need to verify with FLNRO habitat biologists |
| 2.2 | Wood and pulp plantations | Negligible | Negligible (<1 percent) | Unknown | Insignificant/Negligible (Past or no direct effect) | DU2: None |
| 2.3 | Livestock farming and ranching | Negligible | Small (1-10 percent) | Negligible (<1 percent) | Low (Possibly in the long term, >10 yrs/3 gen) | DU2: None |
| 2.4 | Marine and freshwater aquaculture | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | The risks of open net-pen salmon aquaculture on wild Chinook salmon is considered low but data are limited (Riddell et al. 2013). The risk of transmission from farmed Atlantic salmon to wild Chinook salmon is thought to be low because of differences in susceptibility to various diseases. Atlantic salmon farms are located higher north than the mouth of the Fraser River, so the scope is expected to be negligible. Given current practices, farming will continue into the future. |
| 3 | Energy production and mining | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | Not applicable |
| 3.1 | Oil and gas drilling | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 3.2 | Mining and quarrying | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | The land-based coverage of mining area is 0 percent (Porter et al. 2013), the scope of mining is assumed to be negligible in this area. The severity of mining is unknown, and the likelihood of mining to continue in this area is unknown. DU2: need to investigate gravel mining in mainstem Fraser and impact on Harrison chinook |
| 3.3 | Renewable energy | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 4 | Transportation and service corridors | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 4.1 | Roads and railroads | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | Road density in this area is 1.0 km/km2, and there are 0.3 stream crossings per km of fish accessible streams. Both of these are the lower values among the southern BC Chinook DUs. Road densities are presented in linear dimensions in Porter et al. (2013). If we assumed each road was 100m wide (0.1 km wide), which is almost certainly higher than the average, the percent of land covered by roads is still <1 percent. Therefore, we have assigned a scope of negligible <1 percent for this DU. The severity is unknown, but existing road infrastructure is expected to continue. |
| 4.2 | Utility and service lines | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | None |
| 4.3 | Shipping lanes | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | In-river log towing through spawning grounds throughout the year. R. Bailey. Large log booms and booming ground impact migrating and spawning Chinook. |
| 4.4 | Flight paths | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 5 | Biological resource use | C Medium | Pervasive (71-100 percent) | Moderate (11-30 percent) | High (Continuing) | Not applicable |
| 5.1 | Hunting and collecting terrestrial animals | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 5.2 | Gathering terrestrial plants | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 5.3 | Logging and wood harvesting | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | There is 8.5 percent of DU area is under forest disturbance (Porter et al. 2013). DU2: tugs, log booms right through spawning grounds. Need to look into severity. Potential for booms to disturb redds |
| 5.4 | Fishing and harvesting aquatic resources | C Medium | Pervasive (71-100 percent) | Moderate (11-30 percent) | High (Continuing) | The total exploitation rate has declined. From 1980 to 1990, exploitation rate in this DU area is high around 0.7 to 0.8. From 1990 to 2005, average exploitation rate dropped to 0.4. Current trend from 2005 onward, the exploitation rate is decreasing approximately at range 0.4 to 0.2. Based on the exploitation rate within the last 3 generations, the scope of this threat is considered restricted |
| 6 | Human intrusions and disturbance | D Low | Small (1-10 percent) | Serious (31-70 percent) | High (Continuing) | Not applicable |
| 6.1 | Recreational activities | D Low | Small (1-10 percent) | Serious (31-70 percent) | High (Continuing) | Jet boats suck in fish during spring and fall |
| 6.2 | War, civil unrest and military exercises | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 6.3 | Work and other activities | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | None |
| 7 | Natural system modifications | C Medium | Restricted (11-30 percent) | Serious (31-70 percent) | High (Continuing) | Not applicable |
| 7.1 | Fire and fire suppression | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | Insignificant/Negligible (Past or no direct effect) | |
| 7.2 | Dams and water management/use | Negligible | Negligible (<1 percent) | Serious (31-70 percent) | High (Continuing) | According to Porter et al. (2013), 2357.3 m3/ha of water are allocated. No dams impede movement for this DU. |
| 7.3 | Other ecosystem modifications | C Medium | Restricted (11-30 percent) | Serious (31-70 percent) | High (Continuing) | 15.2 percent of the riparian area within the DU has been disturbed (Porter et al. 2013), but the severity of this disturbance on the DU2 Chinook salmon population is unknown. We expect timing to be continuing because of continuing urbanization. Bailey: Also, a large portion of the Lower Fraser and estuary have been significantly altered, leading to loss of critical tide marsh habitat. |
| 8 | Invasive and other problematic species and genes | D Low | Small (1-10 percent) | Moderate (11-30 percent) | High (Continuing) | Not applicable |
| 8.1 | Invasive non-native/alien species | D Low | Small (1-10 percent) | Moderate (11-30 percent) | High (Continuing) | Invasive spiny ray fish are present in Lower Fraser tributaries. |
| 8.2 | Problematic native species | Negligible | Negligible (<1 percent) | Unknown | High (Continuing) | There are no Mountain Pine Beetles reported in this area (Porter et al. 2013) |
| 8.3 | Introduced genetic material | Negligible | Negligible (<1 percent) | Slight (1-10 percent) | Low (Possibly in the long term, >10 yrs/3 gen) | Of the years where sampling occurred, mature individuals all originated from streams that had no low or unknown levels of enhancement. The number of hatchery releases from within DU2 increased from the mid-1980’s to 2004, with the highest release of 3,184,390 in 1992. After 2005, the number of hatchery releases was at a steady rate around 200,000. There is only one instance of hatchery releases from outside the DU. |
| 9 | Pollution | D Low | Small (1-10 percent) | Moderate (11-30 percent) | High (Continuing) | Not applicable |
| 9.1 | Household sewage and urban waste water | Unknown | Unknown | Unknown | High (Continuing) | The average number of permitted waste water discharge locations within this DU is 25 (Porter et al. 2013). However, the scope, severity, and timing of the impact of this water discharge is unknown. |
| 9.2 | Industrial and military effluents | Unknown | Unknown | Unknown | Unknown | Not applicable |
| 9.3 | Agricultural and forestry effluents | D Low | Small (1-10 percent) | Moderate (11-30 percent) | High (Continuing) | Not applicable |
| 9.4 | Garbage and solid waste | Negligible | Negligible (<1 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 9.5 | Air-borne pollutants | Negligible | Negligible (<1 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 9.6 | Excess energy | Unknown | Unknown | Unknown | Unknown | Not applicable |
| 10 | Geological events | Unknown | Unknown | Unknown | Unknown | Not applicable |
| 10.1 | Volcanoes | Unknown | Unknown | Unknown | Unknown | Not applicable |
| 10.2 | Earthquakes/tsunamis | Unknown | Unknown | Unknown | Unknown | Not applicable |
| 10.3 | Avalanches/landslides | Negligible | Negligible (<1 percent) | Serious (31-70 percent) | Moderate (Possibly in the short term, < 10 yrs/3 gen) | Meager Creek landslide likely had a large impact on the Harrison River turbidity for three years and similar events may occur in the future. |
| 11 | Climate change and severe weather | C Medium | Large (31-70 percent) | Moderate (11-30 percent) | Moderate (Possibly in the short term, < 10 yrs/3 gen) | Not applicable |
| 11.1 | Habitat shifting and alteration | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | In a recent report evaluating threats to southern BC Chinook salmon by Riddell et al. (2013), the panel concluded that marine habitat conditions during the first year of marine residency were very likely a key driver in recent trends in survival and productivity. Shifting marine habitat will be experienced by all Chinook salmon in this DU (that is, scope = pervasive). Based on indicator stock information, marine survival is estimated at 2-4 percent. |
| 11.2 | Droughts | Negligible | Negligible (<1 percent) | Serious (31-70 percent) | Unknown | Not applicable |
| 11.3 | Temperature extremes | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | In predicted future, 10 percent change in air temperature over historical baseline in this DU area. Stream temperatures will continue to rise to critical levels (>18C) based on current projections, . (Porter et al. 2013). These increases in stream temperatures are expected to affect the entire population (that is, the scope is pervasive). This impact is expected to be continuing into the future. However, the severity of this is unknown because of limited data (Riddell et al. 2013). |
| 11.4 | Storms and flooding | CD Medium - Low | Large (31-70 percent) | Moderate - Slight (1-30 percent) | Moderate (Possibly in the short term, < 10 yrs/3 gen) | Not applicable |
Classification of Threats adopted from IUCN-CMP, Salafsky et al. (2008).
Threats assessment worksheet
- Species or ecosystem scientific name:
- Oncorhynchus tshawytscha - Chinook Salmon
- Element ID:
- DU9 Middle Fraser, Stream, Spring (MFR+GStr) population
- Date:
- 22/02/2017
- Assessor(s):
- Originally assessed by Brian O. Ma in November, 2014. Revised in February 2017 at a workshop and in December 2018 following assessment. Workshop attendees: Steve Baillie, Richard Bailey, Gayle Brown, Carolyn Churchland, Roger Gallant, Wilf Luedke, Cheryl Lynch, Jason Mahoney, Arlene Tompkins, Nicole Trouton, Greg Wilson, John Neilson (Marine Fishes SSC Co-chair), David Fraser (Facilitator), Bev McBride (COSEWIC Secretariat)
- References:
- (Porter et al. 2013; Riddell et al. 2013; Brown et al. 2013, Pre-COSEWIC report, in-prep); Expert opinion from group identified above.
| Threat impact (descriptions) | Level 1 Threat impact counts: high range |
Level 1 Threat impact counts: low range |
|---|---|---|
| A (Very high) | 0 | 0 |
| B (High) | 1 | 0 |
| C (Medium) | 1 | 3 |
| D (Low) | 3 | 5 |
| Calculated overall threat impact: | High | Medium |
- Assigned overall threat impact:
- BC = High - Medium
- Impact adjustment reasons:
- Not applicable
- Overall threat comments:
- Generation time = ~4.5 yrs. The major threats to this DU are from ecosystem modifications (dyking/ditching for irrigation in lower Fraser leads to a loss of backwater and off-channel habitat; snowpack/hydrologic regime changes). Other less critical challenges include: impacts from livestock and farm equipment entering stream habitat, harvest rates, dams and water management, invasive species, droughts and temperature extremes. A general harvest rate of 25 to 50 percent since 1995 is not specific to the populations within this DU. Riddell et al. (2013) note that sustainable harvest is strongly tied to stock productivity. There is no reliable estimate of stock productivity for this DU.
| Number | Threat | Impact (calculated) |
Scope (next 10 Yrs) |
Severity (10 Yrs or 3 Gen.) |
Timing | Comments |
|---|---|---|---|---|---|---|
| 1 | Residential and commercial development | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
| 1.1 | Housing and urban areas | Not applicable | Not applicable | Not applicable | Not applicable | Urban development comprises only 0.4 percent of the land-based area (Porter et al. 2013) and this trend is expected to continue. |
| 1.2 | Commercial and industrial areas | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 1.3 | Tourism and recreation areas | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 2 | Agriculture and aquaculture | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 2.1 | Annual and perennial non-timber crops | Not applicable | Not applicable | Not applicable | Not applicable | Agricultural development is minimal (2.6 percent of the land-based area) (Porter et al. 2013) and this trend is expected to continue. |
| 2.2 | Wood and pulp plantations | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 2.3 | Livestock farming and ranching | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Not a major impact but cattle do go into streams to drink and tractors cross streams. These impacts are likely increasing due to change in capacity for enforcement (habitat personnel). |
| 2.4 | Marine and freshwater aquaculture | Negligible | Large (31-70 percent) | Negligible (<1 percent) | High (Continuing) | Atlantic salmon farms are located higher north than the mouth of the Fraser River, but most wild Chinook pass these at some point so the scope is broad. The risks of open net-pen salmon aquaculture on wild Chinook Salmon are considered low in the literature but data are limited (Riddell et al. 2013). Fish aquaculture will likely continue to expand in the future, but in this category the proximal impact is from loss of habitat due to farm footprints. The issues of disease transfer and genetic enhancement will be dealt with in line item 8.3 |
| 3 | Energy production and mining | Unknown | Small (1-10 percent) | Unknown | High (Continuing) | Not applicable |
| 3.1 | Oil and gas drilling | Not applicable | Not applicable | Not applicable | Not applicable | None. Difficult to think about proximal impacts. Underwater pipe leaking methane? Some possible concerns about ocean impacts. |
| 3.2 | Mining and quarrying | Unknown | Small (1-10 percent) | Unknown | High (Continuing) | The land-based coverage of mining area is 0.1 percent (Porter et al. 2013), and assuming a random distribution of individuals within the watershed, the scope of mining is assumed to be minor in this area. However, some Placer mining occurs that is not reported. Not enough is known about Placer mining. |
| 3.3 | Renewable energy | Not applicable | Not applicable | Not applicable | Not applicable | None; no IPPs |
| 4 | Transportation and service corridors | Negligible | Small (1-10 percent) | Negligible (<1 percent) | High (Continuing) | Not applicable |
| 4.1 | Roads and railroads | Negligible | Small (1-10 percent) | Negligible (<1 percent) | High (Continuing) | Road density in this area is 1.2 km/km2, and there are 0.5 stream crossings per km of fish accessible streams. Both of these are the moderate values among the southern BC Chinook DUs. Road densities are presented in linear dimensions in Porter et al. (2013). Road densities are presented in linear dimensions in Porter et al. (2013). Assuming each road is 100 m wide (0.1 km wide), which is an overestimate, the percent of land covered by roads is still <1 percent. Existing road infrastructure is expected to remain in place but development trend is unknown. Most effect of roads in this DU is from runoff of pollution (threat 9) . Roads themselves not an issue. A lot more roads here than in the upper Fraser (DU11), built to get pine beetle kill timber. Construction practices have improved - not working right in the stream. |
| 4.2 | Utility and service lines | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 4.3 | Shipping lanes | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 4.4 | Flight paths | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 5 | Biological resource use | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 5.1 | Hunting and collecting terrestrial animals | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 5.2 | Gathering terrestrial plants | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 5.3 | Logging and wood harvesting | Negligible | Restricted (11-30 percent) | Negligible (<1 percent) | High (Continuing) | 13.0 percent of forest is disturbed in this area (Porter et al. 2013). Pine beetle has resulted in a lot of dead forest. Most of this has now been clearcut (may need to update 2013 estimate). Proximal effect = forestry footprint. |
| 5.4 | Fishing and harvesting aquatic resources | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | Total exploitation of southern BC Chinook salmon has been between 25 percent to 50 percent in recent years (since 1995) (Riddell et al. 2013). Comparable rates of harvest are expected to continue for the foreseeable future. The levels of exploitation are typically compared to expected exploitation for Maximum Sustainable Yield (EMSY), and any level below this is considered sustainable. However, because there is no indicator stock for this DU, EMSY has not been estimated and there is no direct measurement of total exploitation specific to this DU. All fish from DU9 have to migrate through fisheries (for example lower Chilcotin). Brood over brood increases in spawners were generally seen until last year (2012-2015 was good but fish going to sea had high mortality). Evidence is less clear that the decline is fully halted. 2005 harvest rate was 60 percent, tried cutting to 30 percent. Assuming overall harvest for this DU is similar to the Nicola, 20-40 percent range is probably actual. These numbers are total in-river and marine harvest rate. Decline has flattened but not completely halted. |
| 6 | Human intrusions and disturbance | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
| 6.1 | Recreational activities | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 6.2 | War, civil unrest and military exercises | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 6.3 | Work and other activities | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 7 | Natural system modifications | BD High - Low | Pervasive (71-100 percent) | Serious - Slight (1-70 percent) | High (Continuing) | Not applicable |
| 7.1 | Fire and fire suppression | Negligible | Negligible (<1 percent) | Moderate (11-30 percent) | High (Continuing) | Fires are a much bigger issue in this area but this is a natural part of the ecosystem. The proximal effect from fires is high short term temperatures in-stream. This is disaggregated here from the temperature section (11.3). Fire retardant may impact but no information. "Bucketing" could result in scooping up fish. |
| 7.2 | Dams and water management/use | D Low | Small (1-10 percent) | Serious - Moderate (11-70 percent) | High (Continuing) | According to Porter et al. (2013), 10803.3 m3/ha of water are allocated. The Bridge/Seton hydroelectric facilities negatively affect habitat in this DU. ~7 percent of Chinook in the DU spawn/rear right under the Bridge dam (expert opinion). The proximal effects of the dam include changes in timing and volume of flow, temperature regime, flushing/scouring and bed maintenance issues. Impact would never be 100 percent severity because not all spawners returning to the Bridge (alternate spawning habitat available). There is a Water Use Plan for Downton. Lower Fraser River dyking for irrigation is also a concern. All fish from this DU pass through the lower Fraser. Note the rating here is linked to impacts from Bridge dam. Lower Fraser impacts, which are pervasive in scope are dealt with in line item 7.3. |
| 7.3 | Other ecosystem modifications | BD High - Low | Pervasive (71-100 percent) | Serious - Slight (1-70 percent) | High (Continuing) | 13.5 percent of the riparian area within the DU has been disturbed (Porter et al. 2013). This stock migrates as juveniles through the lower Fraser (Hope to mouth of Fraser) so they experience significant impact from dyking and future dyking. Ongoing loss of overwintering and rearing habitat in lower Fraser due to conversion of agriculture to residential/commercial. Also new dyking in Chilliwack/Abbotsford so impacts are moving up Fraser. But if ocean survival could return to 5 percent it would reverse decline. In-stream, females in spring actively seek a mix of groundwater/runoff. Shifting snowmelt and snowpack means groundwater recharge is altered. NOTE: There are 2 separate effects here that impact to varying degrees a) dyking, ditching - loss of backwater/off channel habitat, b) snowpack and hydrologic regime changes. |
| 8 | Invasive and other problematic species and genes | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 8.1 | Invasive non-native/alien species | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | More spiny ray issues in mid Fraser than in upper. Tributary to Quesnel (Beaver Valley) has Large Mouth Bass. Potential for 'whirling disease' over next 12 yrs but unknown impact. |
| 8.2 | Problematic native species | Negligible | Pervasive (71-100 percent) | Negligible (<1 percent) | High (Continuing) | 24.6 percent of pine stands were killed by Mountain Pine Beetles in this area (Porter et al. 2013) but the impact has already passed. All fish from this DU are affected by ocean predators (for example seals, sea lions). The impact is considered relatively stable (that is it's as bad as it's going to be and it's not likely to get worse). |
| 8.3 | Introduced genetic material | Not applicable | Not applicable | Not applicable | Not applicable | Of the years where sampling occurred, mature individuals all originated from streams that had low or unknown levels of enhancement. However, there were hatchery releases from within the DU from 1980 to 2000. A very small number of releases occurred until 2001. There are no known hatchery releases after 2001. |
| 9 | Pollution | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | Not applicable |
| 9.1 | Household sewage and urban waste water | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | The average number of permitted waste water discharge points within this DU is 7.5 (Porter et al. 2013). Wastewater treatment plants exist all down the Fraser River. There is a pervasive domestic sewage impact. The volume will rise as the population is growing but directly linking this to a decline in this DU's Chinook populations over next 12yrs would be tough. |
| 9.2 | Industrial and military effluents | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | A lot of impact from industrial development throughout migration route in lower Fraser River |
| 9.3 | Agricultural and forestry effluents | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | Definitely impacts from agricultural effluent in mid and lower Fraser River that affects all fish from this DU. There is forestry activity upstream that will move more upslope. Forestry causes changes in groundwater recharge. One interesting change with Pine Beetle - water table actually improved temporarily because the dead standing trees held the soil but they weren't consuming water. Siltation; Unknown range of impact. |
| 9.4 | Garbage and solid waste | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | Fish consume plastic (micro and macro) - 2-7 microplastic particles per day. Research is ongoing (see Peter Ross work) so there may be data soon. |
| 9.5 | Air-borne pollutants | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 9.6 | Excess energy | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 10 | Geological events | Negligible | Small (1-10 percent) | Negligible (<1 percent) | High (Continuing) | Not applicable |
| 10.1 | Volcanoes | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 10.2 | Earthquakes/tsunamis | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 10.3 | Avalanches/landslides | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | Only minor impacts |
| 11 | Climate change and severe weather | CD Medium - Low | Pervasive (71-100 percent) | Moderate - Slight (1-30 percent) | High (Continuing) | Not applicable |
| 11.1 | Habitat shifting and alteration | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | In a recent report evaluating threats to southern BC Chinook salmon by Riddell et al. (2013), the panel concluded that marine habitat conditions during the first year of marine residency were very likely a key driver in recent trends in survival and productivity. Shifting marine habitat will be experienced by all Chinook salmon in this DU (that is, scope = pervasive). However, the severity is unknown because there is no indicator stock available for this DU, so marine survival cannot be estimated. Major changes expected in ocean in terms of up-welling, anoxic areas ("the blob"). Also, another round of ocean survival impacts as in 2003/2007 would terminate this stock. Ranking here is based on potential marine survival impacts (e.g, El Nino). El Nino makes it worse La Nina makes it better. |
| 11.2 | Droughts | CD Medium - Low | Pervasive (71-100 percent) | Moderate - Slight (1-30 percent) | High (Continuing) | More susceptible to drought than DU11. These are challenging watersheds for Chinook. Frequency of droughts? Check Cariboo/Chilcotin report by Porter and Nelitz. Pervasive because if you have a drought it will affect a large portion of population. |
| 11.3 | Temperature extremes | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | This DU is more susceptible to temp rises than DU11. More plateau landscape means more solar exposure and less water availability; dryer ecozone. Horsefly River is temperature sensitive. All through lower Fraser there is land loss and shade loss. Chinook don't have same problems as Sockeye. The group considered lower Fraser upstream migration but these fish travel through Fraser corridor before the high temperatures happen. This may shift as a result of CC but that will be at 100 yr time scale. Mainly in rearing areas where temperature effects are important. |
| 11.4 | Storms and flooding | Not applicable | Not applicable | Not applicable | Not applicable | None |
Classification of Threats adopted from IUCN-CMP, Salafsky et al. (2008).
Threats assessment worksheet
- Species or ecosystem scientific name:
- Oncorhynchus tshawytscha - Chinook Salmon
- Element ID:
- DU11 - Upper Fraser, Stream, Spring population
- Date:
- 22/02/2017
- Assessor(s):
- Originally assessed by Brian O. Ma in November, 2014. Revised in February 2017 at a workshop and in December 2018 following assessment. Workshop attendees: Steve Baillie, Richard Bailey, Gayle Brown, Carolyn Churchland, Roger Gallant, Wilf Luedke, Cheryl Lynch, Jason Mahoney, Arlene Tompkins, Nicole Trouton, Greg Wilson, John Neilson (Marine Fishes SSC Co-chair), David Fraser (Facilitator), Bev McBride (COSEWIC Secretariat)
- References:
- (Porter et al. 2013; Riddell et al. 2013; Brown et al. 2013, Pre-COSEWIC report, in-prep); Expert opinion from group identified above.
| Threat impact (descriptions) | Level 1 Threat impact counts: high range |
Level 1 Threat impact counts: low range |
|---|---|---|
| A (Very high) | 0 | 0 |
| B (High) | 1 | 0 |
| C (Medium) | 1 | 0 |
| D (Low) | 2 | 4 |
| Calculated overall threat impact: | High | Medium |
- Assigned overall threat impact:
- BC = High - Medium
- Impact adjustment reasons:
- Not applicable
- Overall threat comments:
- Generation time = 4.5yrs.The major threats to this DU are ecosystem modifications due to cyclical marine climate events (El Nino) and groundwater/runoff mixing issues caused by shifting volume and timing of snowmelt. The harvest rate has increased while marine survival rate has declined. However, Riddell et al. (2013) note that sustainable harvest is strongly tied to stock productivity, and this DU does not have a reliable estimate of stock productivity. Other impacts include invasive species (esp. spiny rays), avalanches/landslides, droughts and temperature extremes.
| Number | Threat | Impact (calculated) |
Scope (next 10 Yrs) |
Severity (10 Yrs or 3 Gen.) |
Timing | Comments |
|---|---|---|---|---|---|---|
| 1 | Residential and commercial development | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
| 1.1 | Housing and urban areas | Not applicable | Not applicable | Not applicable | Not applicable | Urban development is considered low in the land-based area of this DU (0.09 percent) (Porter et al. 2013). This level of urbanization is expected to continue. No changes in proximal impacts on Chinook populations are expected. |
| 1.2 | Commercial and industrial areas | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 1.3 | Tourism and recreation areas | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 2 | Agriculture and aquaculture | Negligible | Large (31-70 percent) | Negligible (<1 percent) | High (Continuing) | Not applicable |
| 2.1 | Annual and perennial non-timber crops | Not applicable | Not applicable | Not applicable | Not applicable | Agricultural development covers 0.7 percent of the land-base (Porter et al. 2013) and is expected to continue at this level. No changes in proximal impacts on Chinook populations are expected. |
| 2.2 | Wood and pulp plantations | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 2.3 | Livestock farming and ranching | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 2.4 | Marine and freshwater aquaculture | Negligible | Large (31-70 percent) | Negligible (<1 percent) | High (Continuing) | Atlantic salmon farms are located further north than the mouth of the Fraser River, but most wild Chinook pass these at some point so the scope is broad. The risks of open net-pen salmon aquaculture on wild Chinook salmon are considered low in the literature but data are limited (Riddell et al. 2013). Fish aquaculture will likely continue to expand in the future, but in this category the proximal impact is from loss of habitat due to farm footprints. The issues of disease transfer and genetic enhancement will be dealt with in line item 8.3 |
| 3 | Energy production and mining | Unknown | Small (1-10 percent) | Unknown | High (Continuing) | Not applicable |
| 3.1 | Oil and gas drilling | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 3.2 | Mining and quarrying | Unknown | Small (1-10 percent) | Unknown | High (Continuing) | Mining covers 0.02 percent of the land-base (Porter et al. 2013), and assuming a random distribution of individuals within the watershed, the scope of mining is assumed to be minor in this DU. Some unreported Placer mining occurs but not much. They were mining in Summer. Not enough is known about Placer mining impacts. Need to approach Mike Bradford re: Placer impacts. |
| 3.3 | Renewable energy | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 4 | Transportation and service corridors | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | Not applicable |
| 4.1 | Roads and railroads | Negligible | Negligible (<1 percent) | Negligible (<1 percent) | High (Continuing) | Road density in this area is 0.9 km/km2, and there are 0.5 stream crossings per km of fish accessible streams. These are the moderate values relative to other southern BC Chinook DUs. Road densities are presented in linear dimensions in Porter et al. (2013). Assuming each road is 100 m wide (0.1 km wide), which is an overestimate, the percent of land covered by roads is still <1 percent. Existing road infrastructure is expected to remain in place but development trend is unknown. Most effect of roads in this DU is from runoff of pollution (threat 9). Roads themselves not an issue. |
| 4.2 | Utility and service lines | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 4.3 | Shipping lanes | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 4.4 | Flight paths | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 5 | Biological resource use | Negligible | Pervasive (71-100 percent) | Negligible (<1 percent) | High (Continuing) | Not applicable |
| 5.1 | Hunting and collecting terrestrial animals | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 5.2 | Gathering terrestrial plants | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 5.3 | Logging and wood harvesting | Negligible | Restricted (11-30 percent) | Negligible (<1 percent) | High (Continuing) | 16.6 percent of forest was disturbed in this area (Porter et al. 2013), but any proximal effects due to logging footprint are from the past and are not likely to alter the population from its current state. The proximal effect is minor habitat reduction. |
| 5.4 | Fishing and harvesting aquatic resources | Negligible | Pervasive (71-100 percent) | Negligible (<1 percent) | High (Continuing) | The total exploitation rate has increase from 1986 to 2002 by an estimated 118.7 percent from ~0.4 to ~0.7, but has remained relatively stable since 1995 at ~0.7 . Workshop participants indicated there has been limited success at maintaining the target rate of 30 percent harvest. Last BY the rate was still 40 percent. Fish encounter nets all the way up the Fraser. A lot of the fish are exposed to constant fishing pressure, being slow migrating from mouth of Fraser to end point in upper Fraser. DFO has been unsuccessful at getting First Nations groups in lower Fraser to restrain harvest. First Nations perspective is that this fish is their primary food source. Problem is trying to wind in all the harvest in the river ("700km of very difficult to control everything"); indications are that the marine harvest rate is about 20 percent. |
| 6 | Human intrusions and disturbance | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
| 6.1 | Recreational activities | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 6.2 | War, civil unrest and military exercises | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 6.3 | Work and other activities | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 7 | Natural system modifications | BD High - Low | Pervasive (71-100 percent) | Serious - Slight (1-70 percent) | High (Continuing) | Not applicable |
| 7.1 | Fire and fire suppression | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 7.2 | Dams and water management/use | Unknown | Large (31-70 percent) | Unknown | High (Continuing) | According to Porter et al. (2013), 2695.9 m3/ha of water are allocated. No dams impede movement for this DU. Loss of Sumas Lake, diking and ditching has had a major impact on lower Fraser habitat which these fish pass through. Substantial numbers of Chinook rely on those habitats (for example rearing, overwintering) but it is unknown how many are affected. |
| 7.3 | Other ecosystem modifications | BD High - Low | Pervasive (71-100 percent) | Serious - Slight (1-70 percent) | High (Continuing) | 15.5 percent of the riparian area within the DU has been disturbed (Porter et al. 2013). This stock migrates as juveniles up along coast to Alaska. Another round of ocean survival impacts as in 2003/2007 would terminate it. It's not just ocean impacts, in-stream is also problematic. But if ocean survival could return to 5 percent it would reverse decline. In-stream, females in spring actively seek a mix of groundwater/runoff. Shifting snowmelt and snowpack means groundwater recharge is altered. Ranking here is based on a combination of potential marine survival impacts (for example El Nino) coupled with groundwater/runoff issues. El Nino makes it worse La Nina makes it better. |
| 8 | Invasive and other problematic species and genes | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 8.1 | Invasive non-native/alien species | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Some impacts from spiny rays (bass, persids etc); small mouth bass and yellow perch in Quesnel. Possible future impacts of "whirling disease" - transmission vector not yet well known but thought to be related to anglers. |
| 8.2 | Problematic native species | Negligible | Pervasive (71-100 percent) | Negligible (<1 percent) | High (Continuing) | 5.5 percent of pine stands were killed by Mountain Pine Beetles in this area (Porter et al. 2013) but the impact has already passed. All fish from this DU are affected by ocean predators (for example seals, sea lions). The impact is considered relatively stable (that is it's as bad as it's going to be and it's not likely to get worse). |
| 8.3 | Introduced genetic material | Not applicable | Not applicable | Not applicable | Not applicable | Of the years where sampling occurred, almost all observed spawners originated from streams that had low or unknown levels of enhancement. There was a relatively high level of hatchery releases from within the DU in the 1980s. However, since 1989, the number of hatchery releases declined until stopping with the 2001/2002 Brood Year. |
| 9 | Pollution | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | Not applicable |
| 9.1 | Household sewage and urban waste water | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | The average number of permitted waste water discharge locations within this DU is 1.2 (Porter et al. 2013). Wastewater treatment plants exist all down the Fraser River. There is a pervasive domestic sewage impact. The volume will rise as the population is growing but directly linking this to a decline in this DU's Chinook populations over next 12 yrs would be tough. |
| 9.2 | Industrial and military effluents | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | There is a pulp mill in Prince George, mine tailings in places. A lot of impact from industrial development throughout migration route in lower Fraser River |
| 9.3 | Agricultural and forestry effluents | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | Definitely impacts from agricultural effluent in mid and lower Fraser River that affects all fish from this DU. There is forestry activity upstream that will move more upslope. Forestry causes changes in groundwater recharge. One interesting change with Pine Beetle - water table actually improved temporarily because the dead standing trees held the soil but they weren't consuming water. |
| 9.4 | Garbage and solid waste | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | Fish consume plastic (micro and macro) - 2-7 microplastic particles per day. Research is ongoing (see Peter Ross work) so there may be data soon. |
| 9.5 | Air-borne pollutants | Not applicable | Not applicable | Not applicable | Not applicable | None; airborne pollutants need to become water pollution before impacting fish |
| 9.6 | Excess energy | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 10 | Geological events | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Not applicable |
| 10.1 | Volcanoes | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 10.2 | Earthquakes/tsunamis | Not applicable | Not applicable | Not applicable | Not applicable | None |
| 10.3 | Avalanches/landslides | D Low | Small (1-10 percent) | Slight (1-10 percent) | High (Continuing) | Glacial system with high turbidity. Ongoing impact from avalanches and landslides. |
| 11 | Climate change and severe weather | CD Medium - Low | Pervasive (71-100 percent) | Moderate - Slight (1-30 percent) | High (Continuing) | Not applicable |
| 11.1 | Habitat shifting and alteration | Unknown | Pervasive (71-100 percent) | Unknown | High (Continuing) | In a recent report evaluating threats to southern BC Chinook salmon by Riddell et al. (2013), the panel concluded that marine habitat conditions during the first year of marine residency were very likely a key driver in recent trends in survival and productivity. Shifting marine habitat will be experienced by all Chinook salmon in this DU (that is, scope = pervasive). Marine survival rate is ~0.02 from 1986 to 2002, and has changed -63.1 percent in that time. Marine survival rate data are not available past 2002. |
| 11.2 | Droughts | CD Medium - Low | Pervasive (71-100 percent) | Moderate - Slight (1-30 percent) | High (Continuing) | These fish are relatively resilient but there could be more than 10 percent severity over next 10-15yrs. Hard to predict. A lot would change if the Fraser becomes a migration barrier, but if that occurred there would be far worse problems than drought. |
| 11.3 | Temperature extremes | D Low | Pervasive (71-100 percent) | Slight (1-10 percent) | High (Continuing) | Stream temperatures will continue to rise to critical levels (>18C) based on current projections (Porter et al. 2013). These increases in stream temperatures are expected to affect the entire population (that is, the scope is pervasive). This impact is expected to be continuing into the future. However, the severity of this is unknown because of limited data (Riddell et al. 2013). |
| 11.4 | Storms and flooding | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Classification of Threats adopted from IUCN-CMP, Salafsky et al. (2008).
Appendix 2. Sample sites for southern BC Chinook Salmon Designatable Units
| DU number and name | Site name and estimation methods | Start year | End year |
|---|---|---|---|
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Campbell River: Not applicable | 1980 | 2013 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Campbell River: Relative abundance (type-4) | 1979 | 2012 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Nicomekl River: Not applicable | 2012 | 2012 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Nicomekl River: Relative: constant multi-year methods | 1997 | 1997 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Nicomekl River: Unknown | 1996 | 1996 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Serpentine River: Not applicable | 2012 | 2012 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Serpentine River: Relative: constant multi-year methods | 1997 | 1997 |
| DU1 Southern Mainland - Boundary Bay Ocean Fall | Serpentine River: Unknown | 1996 | 1996 |
| DU2 Lower Fraser Ocean Fall | Harrison River: True abundance (type-2) | 1984 | 2015 |
| DU2 Lower Fraser Ocean Fall | Harrison River: Unknown | 1953 | 1983 |
| DU3 Lower Fraser Stream Spring | Birkenhead River: Relative abundance (type-3) | 2015 | 2015 |
| DU3 Lower Fraser Stream Spring | Birkenhead River: Relative abundance (type-4) | 1975 | 2014 |
| DU3 Lower Fraser Stream Spring | Birkenhead River: Unknown | 1953 | 1983 |
| DU3 Lower Fraser Stream Spring | Green River: Unknown | 1985 | 1985 |
| DU4 Lower Fraser Stream Summer | Pitt River-Upper: Presence-absence (type-6) | 1984 | 1985 |
| DU4 Lower Fraser Stream Summer | Pitt River-Upper: Relative abundance (type-4) | 2002 | 2014 |
| DU4 Lower Fraser Stream Summer | Pitt River-Upper: Unknown | 1953 | 1993 |
| DU5 Lower Fraser Stream Summer | Big Silver Creek:Relative abundance (type-3) | 2015 | 2015 |
| DU5 Lower Fraser Stream Summer | Big Silver Creek: Relative abundance (type-4) | 2005 | 2012 |
| DU5 Lower Fraser Stream Summer | Big Silver Creek: Relative abundance (type-5) | 2013 | 2014 |
| DU5 Lower Fraser Stream Summer | Big Silver Creek: Unknown | 1953 | 1986 |
| DU5 Lower Fraser Stream Summer | Chilliwack: Relative abundance (type-4) | 1990 | 2009 |
| DU5 Lower Fraser Stream Summer | Chilliwack: Unknown | 1953 | 2015 |
| DU5 Lower Fraser Stream Summer | Cogburn Creek: Relative abundance (type-4) | 2015 | 2015 |
| DU5 Lower Fraser Stream Summer | Cogburn Creek: Unknown | 1954 | 1989 |
| DU5 Lower Fraser Stream Summer | Douglas Creek: Relative abundance (type-4) | 2002 | 2008 |
| DU5 Lower Fraser Stream Summer | Douglas Creek: Unknown | 1954 | 1983 |
| DU5 Lower Fraser Stream Summer | Lillooet River: Unknown | 1975 | 1992 |
| DU5 Lower Fraser Stream Summer | Sloquet Creek: Presence-absence (type-6) | 1980 | 1980 |
| DU5 Lower Fraser Stream Summer | Sloquet Creek: Relative abundance (type-4) | 2002 | 2008 |
| DU5 Lower Fraser Stream Summer | Sloquet Creek: Unknown | 1953 | 2014 |
| DU5 Lower Fraser Stream Summer | Tipella Creek: Relative abundance (type-4) | 2002 | 2008 |
| DU5 Lower Fraser Stream Summer | Tipella Creek: Unknown | 1958 | 1958 |
| DU6 Lower Fraser Ocean Summer | Maria Slough: Relative abundance (type-3) | 2002 | 2009 |
| DU6 Lower Fraser Ocean Summer | Maria Slough: Relative abundance (type-4) | 1996 | 2015 |
| DU6 Lower Fraser Ocean Summer | Maria Slough: Unknown | 1953 | 2004 |
| DU7 Middle Fraser Stream Spring (FRCany+GStr) | Anderson River: Unknown | 1960 | 1964 |
| DU7 Middle Fraser Stream Spring (FRCany+GStr) | Nahatlatch River: Relative abundance (type-4) | 2012 | 2015 |
| DU7 Middle Fraser Stream Spring (FRCany+GStr) | Nahatlatch River: Relative abundance (type-5) | 1996 | 2011 |
| DU7 Middle Fraser Stream Spring (FRCany+GStr) | Nahatlatch River: Unknown | 1953 | 1994 |
| DU8 Middle Fraser Stream Fall | Portage Creek: Presence-absence (type-6) | 1995 | 1999 |
| DU8 Middle Fraser Stream Fall | Portage Creek: Relative abundance (type-4) | 2000 | 2015 |
| DU8 Middle Fraser Stream Fall | Portage Creek: Unknown | 1954 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Ahbau Creek: Relative abundance (type-4) | 1996 | 2011 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baezaeko River: Infill | 1995 | 1997 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baezaeko River: Relative abundance (type-4) | 1998 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baezaeko River: Relative abundance (type-5) | 1999 | 1999 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baezaeko River: Unknown | 1986 | 1986 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baker Creek: Infill | 2004 | 2012 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baker Creek: Relative abundance (type-3) | 1995 | 2000 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baker Creek: Relative abundance (type-4) | 1996 | 2011 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Baker Creek: Unknown | 1990 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Bridge River: Infill | 2003 | 2003 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Bridge River: Relative abundance (type-3) | 2005 | 2014 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Bridge River: Relative abundance (type-4) | 1999 | 2012 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Bridge River: True abundance (type-1) | 2015 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Bridge River: Unknown | 1975 | 1998 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Cariboo River-Upper: Relative abundance (type-4) | 2001 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Cariboo River-Upper: Unknown | 1986 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilako River: Infill | 2003 | 2003 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilako River: Relative abundance (type-4) | 2001 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilako River: True abundance (type-2) | 2000 | 2000 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilako River: Unknown | 1953 | 1999 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilcotin River-Lower: Relative abundance (type-4) | 1995 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilcotin River-Lower: Unknown | 1975 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilcotin River-Upper: Relative abundance (type-4) | 1995 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Chilcotin River-Upper: Unknown | 1953 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Churn Creek: Unknown | 1985 | 1985 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Cottonwood River-Lower: Relative abundance (type-4) | 1998 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Cottonwood River-Lower: Unknown | 1951 | 1997 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Driftwood River: Unknown | 1958 | 1968 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Endako River: Infill | 2003 | 2004 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Endako River: Relative abundance (type-3) | 2010 | 2012 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Endako River: Relative abundance (type-4) | 1995 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Endako River: Relative abundance (type-5) | 2007 | 2007 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Endako River: True abundance (type-1) | 2000 | 2000 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Endako River: Unknown | 1959 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Horsefly River: Relative abundance (type-3) | 2011 | 2011 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Horsefly River: Relative abundance (type-4) | 1998 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Horsefly River: Unknown | 1953 | 1997 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Lightning Creek: Relative abundance (type-4) | 1998 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Lightning Creek: Unknown | 1995 | 1997 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Mckinley Creek: Relative abundance (type-3) | 2015 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Mckinley Creek: Relative abundance (type-4) | 1999 | 2014 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Mckinley Creek: True abundance (type-1) | 1998 | 1998 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Mckinley Creek: Unknown | 1986 | 1986 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Narcosli Creek: Infill | 2004 | 2012 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Narcosli Creek: Relative abundance (type-4) | 1995 | 2011 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Narcosli Creek: Unknown | 1987 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Naver Creek: Infill | 2004 | 2012 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Naver Creek: Relative abundance (type-3) | 2000 | 2000 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Naver Creek: Relative abundance (type-4) | 1995 | 2009 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Naver Creek: Relative abundance (type-5) | 2006 | 2006 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Naver Creek: Unknown | 1985 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Nazko River: Infill | 1995 | 1998 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Nazko River: Relative abundance (type-4) | 1997 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Nazko River: Unknown | 1986 | 1986 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Shovel Creek: Relative abundance (type-4) | 2002 | 2002 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Shovel Creek: Relative: varying multi-year methods | 1999 | 1999 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | STEIN River: Unknown | 1977 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Swift River: Not applicable | 1995 | 1997 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Swift River: Relative abundance (type-4) | 1998 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Swift River: Unknown | 1996 | 1996 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Taseko Lake: Relative abundance (type-5) | 1996 | 1998 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | West Road (blackwater) River: Relative abundance (type-3) | 1999 | 1999 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | West Road (blackwater) River: Relative abundance (type-4) | 1995 | 2015 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | West Road (blackwater) River: Unknown | 1960 | 1994 |
| DU9 Middle Fraser Stream Spring (MFR+GStr) | Yalakom River: Unknown | 1953 | 1994 |
| DU10 Middle Fraser Stream Summer | Cariboo River: Relative abundance (type-4) | 1999 | 2015 |
| DU10 Middle Fraser Stream Summer | Cariboo River: Relative abundance (type-5) | 1998 | 2000 |
| DU10 Middle Fraser Stream Summer | Cariboo River: Unknown | 1981 | 1997 |
| DU10 Middle Fraser Stream Summer | Chilko River: Relative abundance (type-3) | 2010 | 2011 |
| DU10 Middle Fraser Stream Summer | Chilko River: Relative abundance (type-4) | 1998 | 2015 |
| DU10 Middle Fraser Stream Summer | Chilko River: Unknown | 1953 | 1997 |
| DU10 Middle Fraser Stream Summer | Elkin Creek: Relative abundance (type-4) | 1999 | 2003 |
| DU10 Middle Fraser Stream Summer | Elkin Creek: Relative abundance (type-5) | 1998 | 1998 |
| DU10 Middle Fraser Stream Summer | Elkin Creek: Unknown | 1967 | 1997 |
| DU10 Middle Fraser Stream Summer | Kazchek Creek: Presence-absence (type-6) | 1983 | 2011 |
| DU10 Middle Fraser Stream Summer | Kazchek Creek: Relative abundance (type-3) | 2004 | 2009 |
| DU10 Middle Fraser Stream Summer | Kazchek Creek: Relative abundance (type-4) | 2001 | 2015 |
| DU10 Middle Fraser Stream Summer | Kazchek Creek: Unknown | 1953 | 2014 |
| DU10 Middle Fraser Stream Summer | Kuzkwa River: Infill | 1999 | 2001 |
| DU10 Middle Fraser Stream Summer | Kuzkwa River: Presence-absence (type-6) | 1984 | 2000 |
| DU10 Middle Fraser Stream Summer | Kuzkwa River: Relative abundance (type-3) | 2004 | 2011 |
| DU10 Middle Fraser Stream Summer | Kuzkwa River: Relative abundance (type-4) | 2002 | 2015 |
| DU10 Middle Fraser Stream Summer | Kuzkwa River: Unknown | 1953 | 1998 |
| DU10 Middle Fraser Stream Summer | Middle River: Unknown | 1960 | 1988 |
| DU10 Middle Fraser Stream Summer | Mitchell River: Presence-absence (type-6) | 2012 | 2012 |
| DU10 Middle Fraser Stream Summer | Mitchell River: Relative abundance (type-3) | 2013 | 2014 |
| DU10 Middle Fraser Stream Summer | Mitchell River: Relative abundance (type-4) | 2009 | 2010 |
| DU10 Middle Fraser Stream Summer | Mitchell River: Relative abundance (type-5) | 2011 | 2011 |
| DU10 Middle Fraser Stream Summer | Nechako River: Relative abundance (type-3) | 2000 | 2014 |
| DU10 Middle Fraser Stream Summer | Nechako River: Relative abundance (type-4) | 1999 | 2015 |
| DU10 Middle Fraser Stream Summer | Nechako River: Relative abundance (type-5) | 1998 | 1998 |
| DU10 Middle Fraser Stream Summer | Nechako River: True abundance (type-2) | 2004 | 2004 |
| DU10 Middle Fraser Stream Summer | Nechako River: Unknown | 1953 | 1997 |
| DU10 Middle Fraser Stream Summer | Ormond Creek:Unknown | 1959 | 1978 |
| DU10 Middle Fraser Stream Summer | Pinchi Creek: Presence-absence (type-6) | 1983 | 2002 |
| DU10 Middle Fraser Stream Summer | Pinchi Creek: Relative abundance (type-3) | 2004 | 2012 |
| DU10 Middle Fraser Stream Summer | Pinchi Creek: Relative abundance (type-4) | 2001 | 2015 |
| DU10 Middle Fraser Stream Summer | Pinchi Creek: Relative abundance (type-5) | 1997 | 2000 |
| DU10 Middle Fraser Stream Summer | Pinchi Creek: Unknown | 1967 | 1998 |
| DU10 Middle Fraser Stream Summer | Quesnel River: Relative abundance (type-4) | 1998 | 2015 |
| DU10 Middle Fraser Stream Summer | Quesnel River: Unknown | 1953 | 2001 |
| DU10 Middle Fraser Stream Summer | Seton and Cayoosh Creek: Relative abundance (type-4) | 2002 | 2012 |
| DU10 Middle Fraser Stream Summer | Seton and Cayoosh Creek: Unknown | 1953 | 2000 |
| DU10 Middle Fraser Stream Summer | Seton River: Presence-absence (type-6) | 2012 | 2012 |
| DU10 Middle Fraser Stream Summer | Seton River: Relative abundance (type-4) | 2001 | 2013 |
| DU10 Middle Fraser Stream Summer | Seton River: Unknown | 1975 | 2000 |
| DU10 Middle Fraser Stream Summer | Stellako River: Presence-absence (type-6) | 1983 | 1990 |
| DU10 Middle Fraser Stream Summer | Stellako River: Relative abundance (type-3) | 2011 | 2011 |
| DU10 Middle Fraser Stream Summer | Stellako River: Relative abundance (type-4) | 2004 | 2015 |
| DU10 Middle Fraser Stream Summer | Stellako River: Relative abundance (type-5) | 1999 | 1999 |
| DU10 Middle Fraser Stream Summer | Stellako River: True abundance (type-1) | 2010 | 2010 |
| DU10 Middle Fraser Stream Summer | Stellako River: True abundance (type-2) | 2012 | 2012 |
| DU10 Middle Fraser Stream Summer | Stellako River: Unknown | 1953 | 2002 |
| DU10 Middle Fraser Stream Summer | Stuart River: Relative abundance (type-3) | 1998 | 2000 |
| DU10 Middle Fraser Stream Summer | Stuart River: Relative abundance (type-4) | 2001 | 2002 |
| DU10 Middle Fraser Stream Summer | Stuart River: Unknown | 1953 | 1997 |
| DU10 Middle Fraser Stream Summer | Tachie River: Unknown | 1953 | 1972 |
| DU10 Middle Fraser Stream Summer | Taseko River: Relative abundance (type-4) | 1953 | 1997 |
| DU10 Middle Fraser Stream Summer | Taseko River: Relative abundance (type-5) | 1998 | 1998 |
| DU10 Middle Fraser Stream Summer | Taseko River: Unknown | 1996 | 1996 |
| DU11 Upper Fraser Stream Spring | Antler Creek: Infill | 2002 | 2002 |
| DU11 Upper Fraser Stream Spring | Antler Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Antler Creek: Unknown | 1994 | 1994 |
| DU11 Upper Fraser Stream Spring | Bad River (James Creek): Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Bad River (James Creek): Unknown | 1979 | 1994 |
| DU11 Upper Fraser Stream Spring | Bowron River: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Bowron River: Unknown | 1953 | 1994 |
| DU11 Upper Fraser Stream Spring | Captain Creek: Relative abundance (type-4) | 1996 | 2015 |
| DU11 Upper Fraser Stream Spring | Captain Creek: Relative abundance (type-5) | 1995 | 1997 |
| DU11 Upper Fraser Stream Spring | Captain Creek: Unknown | 1994 | 1994 |
| DU11 Upper Fraser Stream Spring | Dome Creek: Infill | 2009 | 2012 |
| DU11 Upper Fraser Stream Spring | Dome Creek: Relative abundance (type-3) | 1998 | 1999 |
| DU11 Upper Fraser Stream Spring | Dome Creek: Relative abundance (type-4) | 2006 | 2008 |
| DU11 Upper Fraser Stream Spring | Dome Creek: True abundance (type-1) | 2003 | 2007 |
| DU11 Upper Fraser Stream Spring | Dome Creek: True abundance (type-2) | 2000 | 2004 |
| DU11 Upper Fraser Stream Spring | Dome Creek: Unknown | 1981 | 2015 |
| DU11 Upper Fraser Stream Spring | Driscoll Creek: Relative abundance (type-4) | 2002 | 2002 |
| DU11 Upper Fraser Stream Spring | East Twin Creek: Relative abundance (type-4) | 1998 | 2015 |
| DU11 Upper Fraser Stream Spring | East Twin Creek: Unknown | 1975 | 2002 |
| DU11 Upper Fraser Stream Spring | Fontoniko Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Fontoniko Creek: Unknown | 1979 | 1994 |
| DU11 Upper Fraser Stream Spring | Forgetmenot Creek: Relative abundance (type-4) | 2000 | 2015 |
| DU11 Upper Fraser Stream Spring | Forgetmenot Creek: Unknown | 1994 | 2013 |
| DU11 Upper Fraser Stream Spring | Fraser River-Above Tete Jaune: Relative abundance (type-3) | 1994 | 1999 |
| DU11 Upper Fraser Stream Spring | Fraser River-Above Tete Jaune: Relative abundance (type-4) | 2000 | 2015 |
| DU11 Upper Fraser Stream Spring | Fraser River-Above Tete Jaune: Unknown | 1953 | 1993 |
| DU11 Upper Fraser Stream Spring | Goat River: Relative abundance (type-4) | 1999 | 2015 |
| DU11 Upper Fraser Stream Spring | Goat River: Relative abundance (type-5) | 1998 | 1998 |
| DU11 Upper Fraser Stream Spring | Goat River: Unknown | 1961 | 1997 |
| DU11 Upper Fraser Stream Spring | Haggen Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Haggen Creek: Unknown | 1994 | 1994 |
| DU11 Upper Fraser Stream Spring | Herrick Creek: Relative abundance (type-4) | 1995 | 2000 |
| DU11 Upper Fraser Stream Spring | Herrick Creek: Unknown | 1979 | 1994 |
| DU11 Upper Fraser Stream Spring | Holliday Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Holliday Creek: Unknown | 1994 | 1999 |
| DU11 Upper Fraser Stream Spring | Holmes River: Relative abundance (type-3) | 1995 | 1997 |
| DU11 Upper Fraser Stream Spring | Holmes River: Relative abundance (type-4) | 1998 | 2015 |
| DU11 Upper Fraser Stream Spring | Holmes River: Unknown | 1961 | 1994 |
| DU11 Upper Fraser Stream Spring | Horsey Creek: Presence-absence (type-6) | 1977 | 1977 |
| DU11 Upper Fraser Stream Spring | Horsey Creek: Relative abundance (type-3) | 1996 | 1999 |
| DU11 Upper Fraser Stream Spring | Horsey Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Horsey Creek: Unknown | 1962 | 1994 |
| DU11 Upper Fraser Stream Spring | Humbug Creek: Relative abundance (type-4) | 1996 | 2003 |
| DU11 Upper Fraser Stream Spring | Ice Creek: Infill | 1995 | 1997 |
| DU11 Upper Fraser Stream Spring | Ice Creek: Relative abundance (type-4) | 2000 | 2014 |
| DU11 Upper Fraser Stream Spring | Ice Creek: Relative abundance (type-5) | 1998 | 1999 |
| DU11 Upper Fraser Stream Spring | Ice Creek: Unknown | 1994 | 2015 |
| DU11 Upper Fraser Stream Spring | Indianpoint Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Indianpoint Creek: Relative abundance (type-5) | 1987 | 1987 |
| DU11 Upper Fraser Stream Spring | Indianpoint Creek: Unknown | 1986 | 1994 |
| DU11 Upper Fraser Stream Spring | Kenneth Creek: Relative abundance (type-4) | 2001 | 2003 |
| DU11 Upper Fraser Stream Spring | Kenneth Creek: Relative abundance (type-5) | 1999 | 2000 |
| DU11 Upper Fraser Stream Spring | Kenneth Creek: Unknown | 1986 | 1998 |
| DU11 Upper Fraser Stream Spring | Mcgregor River: Relative: constant multi-year methods | 1998 | 2000 |
| DU11 Upper Fraser Stream Spring | Mcgregor River: Relative: varying multi-year methods | 1997 | 1997 |
| DU11 Upper Fraser Stream Spring | Mcgregor River: Unknown | 1979 | 1991 |
| DU11 Upper Fraser Stream Spring | Mckale River: Infill | 1996 | 1997 |
| DU11 Upper Fraser Stream Spring | Mckale River: Presence-absence (type-6) | 1999 | 1999 |
| DU11 Upper Fraser Stream Spring | Mckale River: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Mckale River: Unknown | 1974 | 1994 |
| DU11 Upper Fraser Stream Spring | Morkill River: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Morkill River: Unknown | 1961 | 1994 |
| DU11 Upper Fraser Stream Spring | Nevin Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Nevin Creek: Unknown | 1962 | 1994 |
| DU11 Upper Fraser Stream Spring | Otter Creek: Unknown | 1996 | 1997 |
| DU11 Upper Fraser Stream Spring | Ptarmigan Creek: Not applicable | 1995 | 1995 |
| DU11 Upper Fraser Stream Spring | Ptarmigan Creek: Relative abundance (type-4) | 1999 | 2003 |
| DU11 Upper Fraser Stream Spring | Ptarmigan Creek: Relative abundance (type-5) | 1997 | 2001 |
| DU11 Upper Fraser Stream Spring | Ptarmigan Creek: Unknown | 1986 | 1998 |
| DU11 Upper Fraser Stream Spring | Robson River: Relative abundance (type-5) | 2000 | 2000 |
| DU11 Upper Fraser Stream Spring | Robson River: Unknown | 1996 | 1996 |
| DU11 Upper Fraser Stream Spring | Salmon River: Presence-absence (type-6) | 1984 | 1984 |
| DU11 Upper Fraser Stream Spring | Salmon River: Relative abundance (type-4) | 1999 | 2015 |
| DU11 Upper Fraser Stream Spring | Salmon River: Unknown | 1958 | 1998 |
| DU11 Upper Fraser Stream Spring | Seebach Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Seebach Creek: Unknown | 1979 | 1994 |
| DU11 Upper Fraser Stream Spring | Slim Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Slim Creek: Unknown | 1961 | 1994 |
| DU11 Upper Fraser Stream Spring | Small Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Small Creek: Unknown | 1994 | 1994 |
| DU11 Upper Fraser Stream Spring | Snowshoe Creek: Relative abundance (type-4) | 2002 | 2003 |
| DU11 Upper Fraser Stream Spring | Snowshoe Creek: Relative abundance (type-5) | 2000 | 2001 |
| DU11 Upper Fraser Stream Spring | Snowshoe Creek: Unknown | 1986 | 1991 |
| DU11 Upper Fraser Stream Spring | Spakwaniko Creek: Relative abundance (type-4) | 2002 | 2003 |
| DU11 Upper Fraser Stream Spring | Spakwaniko Creek: Relative abundance (type-5) | 1998 | 2000 |
| DU11 Upper Fraser Stream Spring | Spakwaniko Creek: Unknown | 1996 | 1996 |
| DU11 Upper Fraser Stream Spring | Sus Creek: Unknown | 1996 | 1996 |
| DU11 Upper Fraser Stream Spring | Swift Creek: Relative abundance (type-3) | 1995 | 2014 |
| DU11 Upper Fraser Stream Spring | Swift Creek: Relative abundance (type-4) | 2002 | 2015 |
| DU11 Upper Fraser Stream Spring | Swift Creek: Unknown | 1970 | 1994 |
| DU11 Upper Fraser Stream Spring | Torpy River: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Torpy River: Unknown | 1961 | 1994 |
| DU11 Upper Fraser Stream Spring | Twin Creek (combined): Infill | 1999 | 1999 |
| DU11 Upper Fraser Stream Spring | Twin Creek (combined): Merged | 2013 | 2015 |
| DU11 Upper Fraser Stream Spring | Twin Creek (combined): Relative abundance (type-4) | 1995 | 2012 |
| DU11 Upper Fraser Stream Spring | Twin Creek (combined): Unknown | 1971 | 1994 |
| DU11 Upper Fraser Stream Spring | Walker Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Walker Creek: Unknown | 1971 | 1994 |
| DU11 Upper Fraser Stream Spring | Wansa Creek: Presence-absence (type-6) | 1995 | 1995 |
| DU11 Upper Fraser Stream Spring | Wansa Creek: Relative abundance (type-4) | 1996 | 2015 |
| DU11 Upper Fraser Stream Spring | Wansa Creek: Unknown | 1994 | 1994 |
| DU11 Upper Fraser Stream Spring | West Twin Creek: Relative abundance (type-3) | 2013 | 2014 |
| DU11 Upper Fraser Stream Spring | West Twin Creek: Relative abundance (type-4) | 1998 | 2015 |
| DU11 Upper Fraser Stream Spring | West Twin Creek: Unknown | 1996 | 2007 |
| DU11 Upper Fraser Stream Spring | Willow River: Relative abundance (type-4) | 1995 | 2015 |
| DU11 Upper Fraser Stream Spring | Willow River: Unknown | 1954 | 1994 |
| DU12 South Thompson Ocean Summer | Adams River: Relative abundance (type-4) | 1997 | 2015 |
| DU12 South Thompson Ocean Summer | Adams River: Relative abundance (type-5) | 2004 | 2004 |
| DU12 South Thompson Ocean Summer | Adams River: Unknown | 1953 | 1996 |
| DU12 South Thompson Ocean Summer | Little River: Relative abundance (type-3) | 1998 | 1999 |
| DU12 South Thompson Ocean Summer | Little River: Relative abundance (type-4) | 1997 | 2015 |
| DU12 South Thompson Ocean Summer | Little River: Unknown | 1953 | 1996 |
| DU12 South Thompson Ocean Summer | Shuswap River-Lower: Relative abundance (type-3) | 1983 | 2005 |
| DU12 South Thompson Ocean Summer | Shuswap River-Lower: True abundance (type-2) | 2006 | 2015 |
| DU12 South Thompson Ocean Summer | Shuswap River-Lower: Unknown | 1953 | 1982 |
| DU12 South Thompson Ocean Summer | Shuswap River-Middle: Relative abundance (type-3) | 1983 | 2005 |
| DU12 South Thompson Ocean Summer | Shuswap River-Middle: Relative abundance (type-4) | 2015 | 2015 |
| DU12 South Thompson Ocean Summer | Shuswap River-Middle: True abundance (type-2) | 2006 | 2014 |
| DU12 South Thompson Ocean Summer | Shuswap River-Middle: Unknown | 1953 | 1982 |
| DU12 South Thompson Ocean Summer | South Thompson River: Relative abundance (type-4) | 1995 | 2015 |
| DU12 South Thompson Ocean Summer | South Thompson River: Unknown | 1953 | 1994 |
| DU12 South Thompson Ocean Summer | Thompson River: Infill | 1997 | 2003 |
| DU12 South Thompson Ocean Summer | Thompson River: Presence-absence (type-6) | 2005 | 2013 |
| DU12 South Thompson Ocean Summer | Thompson River: Relative abundance (type-4) | 1999 | 2015 |
| DU12 South Thompson Ocean Summer | Thompson River: Unknown | 1953 | 1996 |
| DU12 South Thompson Ocean Summer | Wap Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU13 South Thompson Stream Summer | Eagle River: Relative abundance (type-4) | 1999 | 2015 |
| DU13 South Thompson Stream Summer | Eagle River: Unknown | 1953 | 1997 |
| DU13 South Thompson Stream Summer | Salmon River: Relative abundance (type-4) | 1999 | 2008 |
| DU13 South Thompson Stream Summer | Salmon River: True abundance (type-1) | 2012 | 2015 |
| DU13 South Thompson Stream Summer | Salmon River: True abundance (type-2) | 2002 | 2011 |
| DU13 South Thompson Stream Summer | Salmon River: Unknown | 1953 | 1998 |
| DU13 South Thompson Stream Summer | Scotch Creek: Presence-absence (type-6) | 1981 | 2012 |
| DU13 South Thompson Stream Summer | Scotch Creek: Relative abundance (type-3) | 2011 | 2014 |
| DU13 South Thompson Stream Summer | Scotch Creek: Relative abundance (type-4) | 2008 | 2015 |
| DU13 South Thompson Stream Summer | Scotch Creek: True abundance (type-1) | 2010 | 2010 |
| DU13 South Thompson Stream Summer | Scotch Creek: Unknown | 1967 | 1968 |
| DU13 South Thompson Stream Summer | Seymour River: Presence-absence (type-6) | 1978 | 1983 |
| DU13 South Thompson Stream Summer | Seymour River: Relative abundance (type-3) | 2003 | 2015 |
| DU13 South Thompson Stream Summer | Seymour River: Relative abundance (type-4) | 2008 | 2012 |
| DU13 South Thompson Stream Summer | Seymour River: Unknown | 1954 | 1993 |
| DU14 South Thompson Stream Summer | Bessette Creek: Presence-absence (type-6) | 1976 | 1987 |
| DU14 South Thompson Stream Summer | Bessette Creek: Relative abundance (type-3) | 2012 | 2015 |
| DU14 South Thompson Stream Summer | Bessette Creek: Relative abundance (type-4) | 1995 | 2011 |
| DU14 South Thompson Stream Summer | Bessette Creek: Unknown | 1962 | 1994 |
| DU14 South Thompson Stream Summer | Creighton Creek: Presence-absence (type-6) | 2012 | 2012 |
| DU14 South Thompson Stream Summer | Creighton Creek: Relative abundance (type-3) | 2013 | 2014 |
| DU14 South Thompson Stream Summer | Creighton Creek: Relative abundance (type-4) | 2000 | 2015 |
| DU14 South Thompson Stream Summer | Creighton Creek: Relative abundance (type-5) | 1996 | 1998 |
| DU14 South Thompson Stream Summer | Duteau Creek: Relative abundance (type-3) | 2012 | 2015 |
| DU14 South Thompson Stream Summer | Duteau Creek: Relative abundance (type-4) | 1999 | 2011 |
| DU14 South Thompson Stream Summer | Duteau Creek: Relative abundance (type-5) | 1995 | 1998 |
| DU14 South Thompson Stream Summer | Harris Creek: Presence-absence (type-6) | 2012 | 2012 |
| DU14 South Thompson Stream Summer | Harris Creek: Relative abundance (type-3) | 2013 | 2015 |
| DU14 South Thompson Stream Summer | Harris Creek: Relative abundance (type-5) | 1996 | 2011 |
| DU15 Lower Thompson Stream Spring | Bonaparte River: True abundance (type-1) | 2012 | 2015 |
| DU15 Lower Thompson Stream Spring | Bonaparte River: True abundance (type-2) | 1995 | 2011 |
| DU15 Lower Thompson Stream Spring | Bonaparte River: Unknown | 1953 | 1994 |
| DU15 Lower Thompson Stream Spring | Coldwater River: Relative abundance (type-4) | 1999 | 2015 |
| DU15 Lower Thompson Stream Spring | Coldwater River: Relative abundance (type-5) | 1995 | 1998 |
| DU15 Lower Thompson Stream Spring | Coldwater River: Unknown | 1953 | 1994 |
| DU15 Lower Thompson Stream Spring | Deadman River: True abundance (type-1) | 2012 | 2015 |
| DU15 Lower Thompson Stream Spring | Deadman River: True abundance (type-2) | 1995 | 2011 |
| DU15 Lower Thompson Stream Spring | Deadman River: Unknown | 1953 | 1994 |
| DU15 Lower Thompson Stream Spring | Louis Creek: Relative abundance (type-3) | 2012 | 2015 |
| DU15 Lower Thompson Stream Spring | Louis Creek: Relative abundance (type-4) | 2013 | 2013 |
| DU15 Lower Thompson Stream Spring | Louis Creek: Relative abundance (type-5) | 1995 | 2011 |
| DU15 Lower Thompson Stream Spring | Louis Creek: Unknown | 1953 | 1994 |
| DU15 Lower Thompson Stream Spring | Nicola River: True abundance (type-2) | 1995 | 2015 |
| DU15 Lower Thompson Stream Spring | Nicola River: Unknown | 1953 | 1994 |
| DU15 Lower Thompson Stream Spring | Nicola River-Upper: Relative abundance (type-4) | 2008 | 2008 |
| DU15 Lower Thompson Stream Spring | Nicola River-Upper: Relative: varying multi-year methods | 1999 | 1999 |
| DU15 Lower Thompson Stream Spring | Nicola River-Upper: Unknown | 1996 | 1996 |
| DU15 Lower Thompson Stream Spring | Spius Creek: Relative abundance (type-4) | 1995 | 2015 |
| DU15 Lower Thompson Stream Spring | Spius Creek: Unknown | 1953 | 1994 |
| DU16 North Thompson Stream Spring | Albreda River: Unknown | 2000 | 2000 |
| DU16 North Thompson Stream Spring | Blue River: Infill | 2005 | 2005 |
| DU16 North Thompson Stream Spring | Blue River: Presence-absence (type-6) | 1991 | 1997 |
| DU16 North Thompson Stream Spring | Blue River: Relative abundance (type-4) | 1999 | 2014 |
| DU16 North Thompson Stream Spring | Blue River: Unknown | 1979 | 2015 |
| DU16 North Thompson Stream Spring | Finn Creek: Relative abundance (type-3) | 2001 | 2015 |
| DU16 North Thompson Stream Spring | Finn Creek: Relative abundance (type-4) | 1999 | 2007 |
| DU16 North Thompson Stream Spring | Finn Creek: Relative abundance (type-5) | 1997 | 1997 |
| DU16 North Thompson Stream Spring | Finn Creek: Unknown | 1953 | 1998 |
| DU16 North Thompson Stream Spring | Lyon Creek: Presence-absence (type-6) | 1981 | 2011 |
| DU16 North Thompson Stream Spring | Lyon Creek: Relative abundance (type-4) | 1999 | 2013 |
| DU16 North Thompson Stream Spring | Lyon Creek: Unknown | 1969 | 2002 |
| DU16 North Thompson Stream Spring | Mad River: Unknown | 1995 | 1995 |
| DU17 North Thompson Stream Summer | Barriere River: Infill | 1997 | 1998 |
| DU17 North Thompson Stream Summer | Barriere River: Presence-absence (type-6) | 1982 | 1999 |
| DU17 North Thompson Stream Summer | Barriere River: Relative abundance (type-4) | 2001 | 2015 |
| DU17 North Thompson Stream Summer | Barriere River: Relative abundance (type-5) | 2000 | 2007 |
| DU17 North Thompson Stream Summer | Barriere River: Unknown | 1953 | 1996 |
| DU17 North Thompson Stream Summer | Clearwater River: Relative abundance (type-4) | 1995 | 2015 |
| DU17 North Thompson Stream Summer | Clearwater River: Unknown | 1955 | 1994 |
| DU17 North Thompson Stream Summer | Lemieux Creek: Infill | 1997 | 2003 |
| DU17 North Thompson Stream Summer | Lemieux Creek: Presence-absence (type-6) | 1975 | 2011 |
| DU17 North Thompson Stream Summer | Lemieux Creek: Relative abundance (type-3) | 1999 | 2015 |
| DU17 North Thompson Stream Summer | Lemieux Creek: Relative abundance (type-4) | 2001 | 2013 |
| DU17 North Thompson Stream Summer | Lemieux Creek: Unknown | 1953 | 1996 |
| DU17 North Thompson Stream Summer | Mahood River: Relative abundance (type-3) | 1997 | 2000 |
| DU17 North Thompson Stream Summer | Mahood River: Relative abundance (type-4) | 1999 | 2015 |
| DU17 North Thompson Stream Summer | Mahood River: Unknown | 1970 | 1996 |
| DU17 North Thompson Stream Summer | Mann Creek: Presence-absence (type-6) | 1987 | 2011 |
| DU17 North Thompson Stream Summer | Mann Creek: Relative abundance (type-3) | 2012 | 2012 |
| DU17 North Thompson Stream Summer | Mann Creek: Relative abundance (type-4) | 2008 | 2008 |
| DU17 North Thompson Stream Summer | Mann Creek: Relative abundance (type-5) | 1999 | 2015 |
| DU17 North Thompson Stream Summer | Mann Creek: Unknown | 1955 | 2013 |
| DU17 North Thompson Stream Summer | North Thompson River: Relative abundance (type-4) | 1997 | 2003 |
| DU17 North Thompson Stream Summer | North Thompson River: Unknown | 1953 | 1998 |
| DU17 North Thompson Stream Summer | Raft River: Relative abundance (type-3) | 1999 | 2015 |
| DU17 North Thompson Stream Summer | Raft River: Relative abundance (type-4) | 1997 | 2012 |
| DU17 North Thompson Stream Summer | Raft River: Unknown | 1953 | 1996 |
| DU18 South Coast - Georgia Strait Ocean Fall | Ashlu Creek: Unknown | 1983 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Brothers Creek: Unknown | 1979 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Cheakamus River: Not applicable | 2005 | 2013 |
| DU18 South Coast - Georgia Strait Ocean Fall | Cheakamus River: Unknown | 1983 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Drew Creek: Unknown | 1995 | 1997 |
| DU18 South Coast - Georgia Strait Ocean Fall | Indian River: Unknown | 1977 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Klite River: Relative abundance (type-4) | 2010 | 2010 |
| DU18 South Coast - Georgia Strait Ocean Fall | Klite River: Relative abundance (type-5) | 2011 | 2011 |
| DU18 South Coast - Georgia Strait Ocean Fall | Lynn Creek: Unknown | 1979 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Mamquam River: Unknown | 1985 | 1992 |
| DU18 South Coast - Georgia Strait Ocean Fall | Mckercher Creek: Unknown | 1995 | 1995 |
| DU18 South Coast - Georgia Strait Ocean Fall | Pender Harbour Creek: Unknown | 1999 | 1999 |
| DU18 South Coast - Georgia Strait Ocean Fall | Quatam River: Presence-absence (type-6) | 2000 | 2000 |
| DU18 South Coast - Georgia Strait Ocean Fall | Quatam River: Relative abundance (type-3) | 2009 | 2011 |
| DU18 South Coast - Georgia Strait Ocean Fall | Quatam River: Relative abundance (type-4) | 2002 | 2008 |
| DU18 South Coast - Georgia Strait Ocean Fall | Quatam River: Unknown | 1954 | 1967 |
| DU18 South Coast - Georgia Strait Ocean Fall | Richards Creek: Unknown | 1985 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Roberts Creek: Unknown | 2000 | 2000 |
| DU18 South Coast - Georgia Strait Ocean Fall | Seymour River: Not applicable | 1994 | 2011 |
| DU18 South Coast - Georgia Strait Ocean Fall | Seymour River: Unknown | 1976 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Skwawka River: Presence-absence (type-6) | 1995 | 1998 |
| DU18 South Coast - Georgia Strait Ocean Fall | Skwawka River: Relative abundance (type-5) | 2002 | 2002 |
| DU18 South Coast - Georgia Strait Ocean Fall | Skwawka River: Unknown | 1962 | 1994 |
| DU18 South Coast - Georgia Strait Ocean Fall | Squamish River: Not applicable | 2012 | 2013 |
| DU18 South Coast - Georgia Strait Ocean Fall | Squamish River: Relative abundance (type-5) | 1994 | 2011 |
| DU18 South Coast - Georgia Strait Ocean Fall | Squamish River: True abundance (type-1) | 1997 | 1997 |
| DU18 South Coast - Georgia Strait Ocean Fall | Squamish River: Unknown | 1953 | 1993 |
| DU18 South Coast - Georgia Strait Ocean Fall | Tenderfoot Creek: Not applicable | 1999 | 2007 |
| DU18 South Coast - Georgia Strait Ocean Fall | Tenderfoot Creek: Unknown | 1991 | 1991 |
| DU18 South Coast - Georgia Strait Ocean Fall | Theodosia River: Relative abundance (type-3) | 2003 | 2013 |
| DU18 South Coast - Georgia Strait Ocean Fall | Theodosia River: Relative abundance (type-4) | 2002 | 2015 |
| DU18 South Coast - Georgia Strait Ocean Fall | Theodosia River: Unknown | 1967 | 1969 |
| DU18 South Coast - Georgia Strait Ocean Fall | Toba River: Presence-absence (type-6) | 2010 | 2011 |
| DU18 South Coast - Georgia Strait Ocean Fall | Toba River: Relative abundance (type-5) | 1984 | 1991 |
| DU18 South Coast - Georgia Strait Ocean Fall | Toba River: Unknown | 1953 | 1988 |
| DU18 South Coast - Georgia Strait Ocean Fall | Tzoonie River: Unknown | 1953 | 1994 |
| DU18 South Coast - Georgia Strait Ocean Fall | Vancouver River: Unknown | 1995 | 1995 |
| DU18 South Coast - Georgia Strait Ocean Fall | Wilson Creek: Unknown | 1998 | 1998 |
| DU19 East Vancouver Island Stream Spring | Nanaimo River-Upper: Relative abundance (type-4) | 2012 | 2012 |
| DU19 East Vancouver Island Stream Spring | Nanaimo River-Upper: Relative abundance (type-5) | 1979 | 2008 |
| DU20 East Vancouver Island Ocean Summer | Nanaimo River: Relative abundance (type-4) | 1995 | 2003 |
| DU20 East Vancouver Island Ocean Summer | Nanaimo River: Relative abundance (type-5) | 2004 | 2015 |
| DU20 East Vancouver Island Ocean Summer | Nanaimo River: Unknown | 1953 | 1994 |
| DU20 East Vancouver Island Ocean Summer | Puntledge River: Relative abundance (type-3) | 2006 | 2015 |
| DU20 East Vancouver Island Ocean Summer | Puntledge River: True abundance (type-2) | 1990 | 2012 |
| DU20 East Vancouver Island Ocean Summer | Puntledge River: Unknown | 1967 | 1989 |
| DU21 East Vancouver Island Ocean Fall | Black Creek: True abundance (type-1) | 2002 | 2002 |
| DU21 East Vancouver Island Ocean Fall | Chemainus River: Presence-absence (type-6) | 2014 | 2014 |
| DU21 East Vancouver Island Ocean Fall | Chemainus River: Relative abundance (type-3) | 2002 | 2002 |
| DU21 East Vancouver Island Ocean Fall | Chemainus River: Relative abundance (type-4) | 2004 | 2005 |
| DU21 East Vancouver Island Ocean Fall | Chemainus River: Relative abundance (type-5) | 1995 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Chemainus River: Unknown | 1954 | 2013 |
| DU21 East Vancouver Island Ocean Fall | Cowichan River: Relative abundance (type-3) | 1965 | 2013 |
| DU21 East Vancouver Island Ocean Fall | Cowichan River: Relative abundance (type-4) | 1978 | 1979 |
| DU21 East Vancouver Island Ocean Fall | Cowichan River: True abundance (type-1) | 1988 | 2008 |
| DU21 East Vancouver Island Ocean Fall | Cowichan River: True abundance (type-2) | 1997 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Cowichan River: Unknown | 1953 | 1987 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: Infill | 2004 | 2004 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: Presence-absence (type-6) | 1994 | 2009 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: Relative abundance (type-3) | 2005 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: Relative abundance (type-4) | 2000 | 2014 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: Relative abundance (type-5) | 1997 | 2007 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: True abundance (type-1) | 1999 | 1999 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: True abundance (type-2) | 2001 | 2003 |
| DU21 East Vancouver Island Ocean Fall | Englishman River: Unknown | 1960 | 1993 |
| DU21 East Vancouver Island Ocean Fall | Goldstream River: Presence-absence (type-6) | 1995 | 1998 |
| DU21 East Vancouver Island Ocean Fall | Goldstream River: Relative abundance (type-4) | 2000 | 2011 |
| DU21 East Vancouver Island Ocean Fall | Goldstream River: Relative abundance (type-5) | 1999 | 2006 |
| DU21 East Vancouver Island Ocean Fall | Goldstream River: True abundance (type-1) | 2007 | 2008 |
| DU21 East Vancouver Island Ocean Fall | Goldstream River: True abundance (type-2) | 2004 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Goldstream River: Unknown | 1962 | 1994 |
| DU21 East Vancouver Island Ocean Fall | Haslam Creek: Presence-absence (type-6) | 2000 | 2000 |
| DU21 East Vancouver Island Ocean Fall | Haslam Creek: Relative abundance (type-3) | 2002 | 2003 |
| DU21 East Vancouver Island Ocean Fall | Haslam Creek: Unknown | 1995 | 1998 |
| DU21 East Vancouver Island Ocean Fall | Koksilah River: Presence-absence (type-6) | 2003 | 2003 |
| DU21 East Vancouver Island Ocean Fall | Koksilah River: Relative abundance (type-5) | 2002 | 2002 |
| DU21 East Vancouver Island Ocean Fall | Koksilah River: Unknown | 1953 | 1992 |
| DU21 East Vancouver Island Ocean Fall | Little Qualicum River: Relative abundance (type-3) | 1990 | 2013 |
| DU21 East Vancouver Island Ocean Fall | Little Qualicum River: Relative abundance (type-4) | 2012 | 2014 |
| DU21 East Vancouver Island Ocean Fall | Little Qualicum River: Relative abundance (type-5) | 2015 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Little Qualicum River: True abundance (type-2) | 2005 | 2005 |
| DU21 East Vancouver Island Ocean Fall | Little Qualicum River: Unknown | 1953 | 1989 |
| DU21 East Vancouver Island Ocean Fall | Mesachie Creek: True abundance (type-1) | 1986 | 1986 |
| DU21 East Vancouver Island Ocean Fall | Morrison Creek: Relative abundance (type-5) | 2010 | 2010 |
| DU21 East Vancouver Island Ocean Fall | Morrison Creek: Relative: varying multi-year methods | 1998 | 2001 |
| DU21 East Vancouver Island Ocean Fall | Nanaimo River: Relative abundance (type-3) | 2004 | 2013 |
| DU21 East Vancouver Island Ocean Fall | Nanaimo River: Relative abundance (type-4) | 2012 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Nanaimo River: Relative abundance (type-5) | 1980 | 1980 |
| DU21 East Vancouver Island Ocean Fall | Nanaimo River: True abundance (type-1) | 1995 | 2003 |
| DU21 East Vancouver Island Ocean Fall | Nanaimo River: True abundance (type-2) | 2005 | 2005 |
| DU21 East Vancouver Island Ocean Fall | Nanaimo River: Unknown | 1979 | 1994 |
| DU21 East Vancouver Island Ocean Fall | Nanoose Creek: Presence-absence (type-6) | 2002 | 2002 |
| DU21 East Vancouver Island Ocean Fall | Napoleon Creek: True abundance (type-1) | 1999 | 2000 |
| DU21 East Vancouver Island Ocean Fall | Napoleon Creek: Unknown | 1996 | 2001 |
| DU21 East Vancouver Island Ocean Fall | Oyster River: Presence-absence (type-6) | 2011 | 2011 |
| DU21 East Vancouver Island Ocean Fall | Oyster River: Relative abundance (type-3) | 2002 | 2002 |
| DU21 East Vancouver Island Ocean Fall | Oyster River: Relative abundance (type-5) | 1997 | 2003 |
| DU21 East Vancouver Island Ocean Fall | Oyster River: Unknown | 1953 | 2013 |
| DU21 East Vancouver Island Ocean Fall | Patricia Creek: Presence-absence (type-6) | 1990 | 1992 |
| DU21 East Vancouver Island Ocean Fall | Patricia Creek: Relative: varying multi-year methods | 2001 | 2001 |
| DU21 East Vancouver Island Ocean Fall | Puntledge River: Not applicable | 1953 | 1953 |
| DU21 East Vancouver Island Ocean Fall | Puntledge River: Relative abundance (type-3) | 2006 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Puntledge River: Relative abundance (type-4) | 2007 | 2007 |
| DU21 East Vancouver Island Ocean Fall | Puntledge River: Relative abundance (type-5) | 1975 | 1989 |
| DU21 East Vancouver Island Ocean Fall | Puntledge River: True abundance (type-2) | 1990 | 2005 |
| DU21 East Vancouver Island Ocean Fall | Puntledge River: Unknown | 1967 | 1974 |
| DU21 East Vancouver Island Ocean Fall | Qualicum River: Relative abundance (type-3) | 2006 | 2015 |
| DU21 East Vancouver Island Ocean Fall | Qualicum River: True abundance (type-1) | 1990 | 2004 |
| DU21 East Vancouver Island Ocean Fall | Qualicum River: True abundance (type-2) | 2005 | 2008 |
| DU21 East Vancouver Island Ocean Fall | Qualicum River: Unknown | 1953 | 1989 |
| DU21 East Vancouver Island Ocean Fall | Robertson River: Presence-absence (type-6) | 1990 | 2000 |
| DU21 East Vancouver Island Ocean Fall | Rosewall Creek: Presence-absence (type-6) | 2000 | 2000 |
| DU21 East Vancouver Island Ocean Fall | Shaw Creek: Presence-absence (type-6) | 1991 | 2003 |
| DU21 East Vancouver Island Ocean Fall | Shaw Creek: Relative abundance (type-3) | 2001 | 2001 |
| DU21 East Vancouver Island Ocean Fall | Shaw Creek: True abundance (type-2) | 2004 | 2004 |
| DU21 East Vancouver Island Ocean Fall | Shaw Creek: Unknown | 1999 | 1999 |
| DU21 East Vancouver Island Ocean Fall | Simms Creek: True abundance (type-1) | 2007 | 2010 |
| DU21 East Vancouver Island Ocean Fall | Simms Creek: True abundance (type-2) | 1999 | 2005 |
| DU21 East Vancouver Island Ocean Fall | Simms Creek: Unknown | 1997 | 2004 |
| DU21 East Vancouver Island Ocean Fall | Tod Creek: Presence-absence (type-6) | 1987 | 1989 |
| DU21 East Vancouver Island Ocean Fall | Tsable River: True abundance (type-1) | 1999 | 1999 |
| DU21 East Vancouver Island Ocean Fall | Tsable River: Unknown | 1991 | 1993 |
| DU21 East Vancouver Island Ocean Fall | Willow Creek: True abundance (type-1) | 1999 | 2000 |
| DU21 East Vancouver Island Ocean Fall | Willow Creek: Unknown | 1995 | 2014 |
| DU21 East Vancouver Island Ocean Fall | Woods Creek: Unknown | 2001 | 2001 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahnuhati River: Presence-absence (type-6) | 2004 | 2004 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahnuhati River: Relative abundance (type-3) | 2014 | 2014 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahnuhati River: Relative abundance (type-4) | 2002 | 2002 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahnuhati River: Relative abundance (type-5) | 1995 | 2005 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahnuhati River: Unknown | 1953 | 1994 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahta River: Relative abundance (type-3) | 2014 | 2014 |
| DU22 South Coast - Southern Fjords Ocean Fall | Ahta River: Unknown | 1996 | 1999 |
| DU22 South Coast - Southern Fjords Ocean Fall | Apple River: Presence-absence (type-6) | 1995 | 2000 |
| DU22 South Coast - Southern Fjords Ocean Fall | Apple River: Relative abundance (type-4) | 2002 | 2011 |
| DU22 South Coast - Southern Fjords Ocean Fall | Apple River: Relative abundance (type-5) | 2001 | 2009 |
| DU22 South Coast - Southern Fjords Ocean Fall | Apple River: Unknown | 1967 | 1992 |
| DU22 South Coast - Southern Fjords Ocean Fall | Fanny Bay Creek: Unknown | 1996 | 1996 |
| DU22 South Coast - Southern Fjords Ocean Fall | Franklin River: Unknown | 1953 | 1966 |
| DU22 South Coast - Southern Fjords Ocean Fall | Fulmore River: Unknown | 1953 | 1984 |
| DU22 South Coast - Southern Fjords Ocean Fall | Glendale Creek: Relative: constant multi-year methods | 1998 | 1998 |
| DU22 South Coast - Southern Fjords Ocean Fall | Heydon Creek: True abundance (type-1) | 1999 | 2011 |
| DU22 South Coast - Southern Fjords Ocean Fall | Heydon Creek: True abundance (type-2) | 2001 | 2001 |
| DU22 South Coast - Southern Fjords Ocean Fall | Heydon Creek: Unknown | 1966 | 2002 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kakweiken River: Presence-absence (type-6) | 1995 | 2000 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kakweiken River: Relative abundance (type-3) | 2011 | 2011 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kakweiken River: Relative abundance (type-4) | 2002 | 2002 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kakweiken River: Relative abundance (type-5) | 1996 | 1997 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kakweiken River: Unknown | 1953 | 1994 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kingcome River: Relative abundance (type-3) | 2004 | 2010 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kingcome River: Relative abundance (type-4) | 2002 | 2011 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kingcome River: Relative abundance (type-5) | 1995 | 2014 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kingcome River: Unknown | 1953 | 1994 |
| DU22 South Coast - Southern Fjords Ocean Fall | Kwalate Creek: Unknown | 1953 | 1996 |
| DU22 South Coast - Southern Fjords Ocean Fall | Orford River: Relative abundance (type-3) | 2011 | 2011 |
| DU22 South Coast - Southern Fjords Ocean Fall | Orford River: Relative abundance (type-5) | 1996 | 2005 |
| DU22 South Coast - Southern Fjords Ocean Fall | Orford River: Unknown | 1953 | 1994 |
| DU22 South Coast - Southern Fjords Ocean Fall | Phillips River: Presence-absence (type-6) | 1995 | 2000 |
| DU22 South Coast - Southern Fjords Ocean Fall | Phillips River: Relative abundance (type-3) | 2006 | 2014 |
| DU22 South Coast - Southern Fjords Ocean Fall | Phillips River: Relative abundance (type-4) | 2002 | 2009 |
| DU22 South Coast - Southern Fjords Ocean Fall | Phillips River: Relative abundance (type-5) | 2001 | 2015 |
| DU22 South Coast - Southern Fjords Ocean Fall | Phillips River: True abundance (type-2) | 2012 | 2012 |
| DU22 South Coast - Southern Fjords Ocean Fall | Phillips River: Unknown | 1953 | 1994 |
| DU22 South Coast - Southern Fjords Ocean Fall | Sim River: Unknown | 1953 | 1992 |
| DU22 South Coast - Southern Fjords Ocean Fall | Southgate River: Relative abundance (type-5) | 1995 | 1995 |
| DU22 South Coast - Southern Fjords Ocean Fall | Southgate River: Unknown | 1953 | 1990 |
| DU22 South Coast - Southern Fjords Ocean Fall | Stafford River: Presence-absence (type-6) | 1995 | 1998 |
| DU22 South Coast - Southern Fjords Ocean Fall | Stafford River: Relative abundance (type-4) | 2002 | 2002 |
| DU22 South Coast - Southern Fjords Ocean Fall | Stafford River: Unknown | 1954 | 1993 |
| DU22 South Coast - Southern Fjords Ocean Fall | Teaquahan River: Presence-absence (type-6) | 1987 | 1987 |
| DU22 South Coast - Southern Fjords Ocean Fall | Teaquahan River: Unknown | 1953 | 1980 |
| DU22 South Coast - Southern Fjords Ocean Fall | Wakeman River: Relative abundance (type-3) | 2008 | 2010 |
| DU22 South Coast - Southern Fjords Ocean Fall | Wakeman River: Relative abundance (type-4) | 2002 | 2011 |
| DU22 South Coast - Southern Fjords Ocean Fall | Wakeman River: Relative abundance (type-5) | 1995 | 2014 |
| DU22 South Coast - Southern Fjords Ocean Fall | Wakeman River: Unknown | 1953 | 1994 |
| DU22 South Coast - Southern Fjords Ocean Fall | Warner Bay Creek: Unknown | 1994 | 2003 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Adam River: Presence-absence (type-6) | 1984 | 2000 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Adam River: Relative abundance (type-3) | 2005 | 2014 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Adam River: Relative abundance (type-4) | 2002 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Adam River: Relative abundance (type-5) | 2001 | 2001 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Adam River: Unknown | 1953 | 1994 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Amor De Cosmos Creek: Relative abundance (type-3) | 2009 | 2013 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Amor De Cosmos Creek: Relative abundance (type-4) | 2015 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Amor De Cosmos Creek: Relative abundance (type-5) | 2005 | 2008 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Amor De Cosmos Creek: Unknown | 1954 | 2004 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Campbell River: True abundance (type-2) | 1984 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Campbell River: Unknown | 1953 | 1983 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Cluxewe River: Not applicable | 1988 | 1988 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Cluxewe River: Unknown | 1991 | 1998 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Eve River: Relative abundance (type-5) | 2001 | 2001 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Granite Bay Creek: Unknown | 2000 | 2000 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Kokish River: Presence-absence (type-6) | 1997 | 2004 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Kokish River: Relative abundance (type-3) | 2012 | 2012 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Kokish River: Relative abundance (type-4) | 2015 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Kokish River: Relative abundance (type-5) | 1996 | 1996 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Kokish River: Unknown | 1963 | 2014 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Menzies Creek: Relative abundance (type-3) | 2009 | 2013 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Menzies Creek: Relative abundance (type-4) | 2011 | 2014 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Menzies Creek: Relative abundance (type-5) | 2008 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Menzies Creek: Unknown | 1995 | 2004 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Mohun Creek: Presence-absence (type-6) | 1999 | 1999 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Mohun Creek: Unknown | 2000 | 2004 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Nahwitti River: Unknown | 1998 | 1998 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Nimpkish River: Not applicable | 2015 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Nimpkish River: Relative abundance (type-3) | 2004 | 2014 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Nimpkish River: Relative abundance (type-4) | 2007 | 2008 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Nimpkish River: Relative abundance (type-5) | 1995 | 2006 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Nimpkish River: Unknown | 1953 | 1994 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Quatse River: Relative abundance (type-5) | 2001 | 2006 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Quatse River: Unknown | 1983 | 2004 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Quinsam River: True abundance (type-2) | 1984 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Quinsam River: Unknown | 1957 | 1983 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Salmon River: Presence-absence (type-6) | 1995 | 2000 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Salmon River: Relative abundance (type-3) | 2004 | 2014 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Salmon River: Relative abundance (type-4) | 2002 | 2015 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Salmon River: Relative abundance (type-5) | 2001 | 2003 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Salmon River: Unknown | 1953 | 1994 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Tsitika River: Presence-absence (type-6) | 1998 | 1998 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Tsitika River: Unknown | 1984 | 1992 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | White River: Unknown | 1982 | 1996 |
| DU23 East Vancouver Island Ocean Fall (EVI + SFj) | Woss River: Not applicable | 1985 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Ayum Creek: Unknown | 1997 | 1997 |
| DU24 West Vancouver Island Ocean Fall (South) | Bedwell System: Not applicable | 1990 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Bedwell System: Presence-absence (type-6) | 1985 | 1985 |
| DU24 West Vancouver Island Ocean Fall (South) | Bedwell System: Relative abundance (type-3) | 2012 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Bedwell System: True abundance (type-2) | 1995 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Bedwell System: Unknown | 1986 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Carnation Creek: True abundance (type-1) | 1999 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Carnation Creek: Unknown | 1982 | 1997 |
| DU24 West Vancouver Island Ocean Fall (South) | Caycuse River: Relative abundance (type-5) | 1998 | 2006 |
| DU24 West Vancouver Island Ocean Fall (South) | Caycuse River: Unknown | 1986 | 1992 |
| DU24 West Vancouver Island Ocean Fall (South) | Charters River: Relative abundance (type-5) | 1999 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Charters River: Unknown | 1996 | 1997 |
| DU24 West Vancouver Island Ocean Fall (South) | China Creek: Relative abundance (type-5) | 1989 | 1991 |
| DU24 West Vancouver Island Ocean Fall (South) | China Creek: Unknown | 1961 | 1990 |
| DU24 West Vancouver Island Ocean Fall (South) | Clayoquot River-Lower: Unknown | 1995 | 1996 |
| DU24 West Vancouver Island Ocean Fall (South) | Clayoquot River-Upper: Relative abundance (type-4) | 2002 | 2002 |
| DU24 West Vancouver Island Ocean Fall (South) | Clayoquot River-Upper: Relative: constant multi-year methods | 1999 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Clayoquot River-Upper: True abundance (type-1) | 2001 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Clayoquot River-Upper: Unknown | 1996 | 1996 |
| DU24 West Vancouver Island Ocean Fall (South) | Clemens Creek: Not applicable | 1985 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Clemens Creek: Presence-absence (type-6) | 2010 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Clemens Creek: Relative abundance (type-4) | 2002 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Clemens Creek: Relative abundance (type-5) | 2003 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Clemens Creek: Unknown | 2004 | 2004 |
| DU24 West Vancouver Island Ocean Fall (South) | Coeur D'Alene Creek: Presence-absence (type-6) | 1995 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Coeur D'Alene Creek: Relative abundance (type-5) | 2001 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Coeur D'Alene Creek: Unknown | 1958 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Coleman Creek: Unknown | 1968 | 1984 |
| DU24 West Vancouver Island Ocean Fall (South) | Consinka Creek: Unknown | 1995 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Cous Creek: Presence-absence (type-6) | 2012 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Cous Creek: Unknown | 1964 | 1990 |
| DU24 West Vancouver Island Ocean Fall (South) | Cypre River: Relative abundance (type-3) | 2015 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Cypre River: Relative abundance (type-4) | 2001 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Cypre River: Relative abundance (type-5) | 1995 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Cypre River: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | De Mamiel Creek: Relative abundance (type-4) | 1999 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | De Mamiel Creek: Relative abundance (type-5) | 2000 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | De Mamiel Creek: Unknown | 1995 | 1998 |
| DU24 West Vancouver Island Ocean Fall (South) | Doobah Creek: True abundance (type-1) | 1998 | 1998 |
| DU24 West Vancouver Island Ocean Fall (South) | Drinkwater Creek: True abundance (type-1) | 2001 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Effingham River: Presence-absence (type-6) | 1996 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Effingham River: Unknown | 1953 | 1992 |
| DU24 West Vancouver Island Ocean Fall (South) | Franklin River: Presence-absence (type-6) | 1995 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Franklin River: Relative abundance (type-5) | 2000 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Franklin River: Unknown | 1956 | 1990 |
| DU24 West Vancouver Island Ocean Fall (South) | Gordon River: Presence-absence (type-6) | 2015 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Gordon River: Relative abundance (type-3) | 1996 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Gordon River: Relative abundance (type-5) | 1995 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Gordon River: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Harris Creek: Presence-absence (type-6) | 2011 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Harris Creek: Relative abundance (type-4) | 2003 | 2005 |
| DU24 West Vancouver Island Ocean Fall (South) | Harris Creek: Relative abundance (type-5) | 2008 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Harris Creek: Unknown | 1995 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Henderson Lake Creek: Relative abundance (type-4) | 2002 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Henderson Lake Creek: Relative abundance (type-5) | 1995 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Henderson Lake Creek: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Ice River: Presence-absence (type-6) | 1995 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Ice River: Relative abundance (type-5) | 2001 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Ice River: Unknown | 1953 | 1991 |
| DU24 West Vancouver Island Ocean Fall (South) | Itatsoo Creek: Unknown | 1997 | 1997 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Lower: Presence-absence (type-6) | 1995 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Lower: Relative abundance (type-4) | 2000 | 2007 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Lower: Relative abundance (type-5) | 2008 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Lower: Unknown | 1953 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Upper: Presence-absence (type-6) | 2010 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Upper: Relative abundance (type-3) | 2002 | 2002 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Upper: Relative abundance (type-4) | 2003 | 2007 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Upper: Relative abundance (type-5) | 2008 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Upper: True abundance (type-1) | 2000 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Kennedy River-Upper: Unknown | 1996 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Klanawa River: Presence-absence (type-6) | 2003 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Klanawa River: Relative abundance (type-5) | 2004 | 2006 |
| DU24 West Vancouver Island Ocean Fall (South) | Klanawa River: Unknown | 1975 | 1978 |
| DU24 West Vancouver Island Ocean Fall (South) | Lens Creek: Relative abundance (type-5) | 2012 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Lens Creek: Unknown | 1998 | 1998 |
| DU24 West Vancouver Island Ocean Fall (South) | Macktush Creek: Presence-absence (type-6) | 2012 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Macktush Creek: Unknown | 1964 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Maggie River: Unknown | 1996 | 1996 |
| DU24 West Vancouver Island Ocean Fall (South) | Megin River: Not applicable | 1990 | 1990 |
| DU24 West Vancouver Island Ocean Fall (South) | Megin River: Presence-absence (type-6) | 1985 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Megin River: Relative abundance (type-3) | 2002 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Megin River: Relative abundance (type-4) | 1995 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Megin River: Relative abundance (type-5) | 2000 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Megin River: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Mercantile Creek: Presence-absence (type-6) | 1995 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Mercantile Creek: Relative abundance (type-5) | 2002 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Mercantile Creek: Unknown | 1985 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Infill | 2012 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Not applicable | 1986 | 1992 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Presence-absence (type-6) | 1985 | 1988 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Relative abundance (type-3) | 1995 | 2005 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Relative abundance (type-4) | 2006 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Relative abundance (type-5) | 2013 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Moyeha River: Unknown | 1953 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Nahmint River: Presence-absence (type-6) | 1987 | 1987 |
| DU24 West Vancouver Island Ocean Fall (South) | Nahmint River: Relative abundance (type-3) | 1995 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Nahmint River: Relative abundance (type-4) | 2003 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Nahmint River: True abundance (type-2) | 2014 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Nahmint River: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Nitinat River: Relative abundance (type-3) | 2013 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Nitinat River: Relative abundance (type-4) | 2003 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Nitinat River: Relative abundance (type-5) | 2011 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Nitinat River: True abundance (type-1) | 1995 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Nitinat River: True abundance (type-2) | 2002 | 2008 |
| DU24 West Vancouver Island Ocean Fall (South) | Nitinat River: Unknown | 1953 | 2006 |
| DU24 West Vancouver Island Ocean Fall (South) | Pipestem Creek: Unknown | 1995 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Renfrew Creek: Presence-absence (type-6) | 2007 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Renfrew Creek: Relative abundance (type-4) | 2005 | 2005 |
| DU24 West Vancouver Island Ocean Fall (South) | Renfrew Creek: Relative abundance (type-5) | 2013 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Renfrew Creek: Unknown | 1997 | 1998 |
| DU24 West Vancouver Island Ocean Fall (South) | Rocky Creek: Presence-absence (type-6) | 1999 | 1999 |
| DU24 West Vancouver Island Ocean Fall (South) | Rocky Creek: Unknown | 1996 | 1997 |
| DU24 West Vancouver Island Ocean Fall (South) | San Juan River: Infill | 2004 | 2004 |
| DU24 West Vancouver Island Ocean Fall (South) | San Juan River: Relative abundance (type-4) | 1995 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | San Juan River: Relative abundance (type-5) | 2013 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | San Juan River: True abundance (type-2) | 2014 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | San Juan River: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Sand River: Presence-absence (type-6) | 2008 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Sand River: Relative abundance (type-5) | 2002 | 2004 |
| DU24 West Vancouver Island Ocean Fall (South) | Sand River: True abundance (type-1) | 2001 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Sand River: Unknown | 1996 | 1996 |
| DU24 West Vancouver Island Ocean Fall (South) | Sarita River: Relative abundance (type-3) | 1995 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Sarita River: Relative abundance (type-4) | 2002 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Sarita River: Relative abundance (type-5) | 1987 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Sarita River: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Smith Creek: Relative abundance (type-4) | 2002 | 2002 |
| DU24 West Vancouver Island Ocean Fall (South) | Smith Creek: Unknown | 1996 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Snug Basin Creek: Unknown | 1995 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass River: Not applicable | 1977 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass River: Relative abundance (type-4) | 1997 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass River: Relative abundance (type-5) | 1998 | 1998 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass River: Unknown | 1985 | 2008 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass-Sproat-GC System: Relative abundance (type-3) | 1985 | 1985 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass-Sproat-GC System: True abundance (type-1) | 1990 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass-Sproat-GC System: True abundance (type-2) | 1986 | 2012 |
| DU24 West Vancouver Island Ocean Fall (South) | Somass-Sproat-GC System: Unknown | 1953 | 1984 |
| DU24 West Vancouver Island Ocean Fall (South) | Sooke River: Infill | 2003 | 2008 |
| DU24 West Vancouver Island Ocean Fall (South) | Sooke River: Presence-absence (type-6) | 1995 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Sooke River: Relative abundance (type-3) | 1996 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Sooke River: Relative abundance (type-4) | 2007 | 2007 |
| DU24 West Vancouver Island Ocean Fall (South) | Sooke River: Relative abundance (type-5) | 2005 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Sooke River: Unknown | 1954 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Sugsaw Creek: Unknown | 1997 | 2001 |
| DU24 West Vancouver Island Ocean Fall (South) | Sydney River: Presence-absence (type-6) | 1995 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Sydney River: Relative abundance (type-5) | 2001 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Sydney River: Unknown | 1953 | 1993 |
| DU24 West Vancouver Island Ocean Fall (South) | Thornton Creek: Relative abundance (type-4) | 1997 | 2004 |
| DU24 West Vancouver Island Ocean Fall (South) | Thornton Creek: Relative abundance (type-5) | 1985 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Thornton Creek: Unknown | 1988 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Tofino Creek: Presence-absence (type-6) | 1996 | 1996 |
| DU24 West Vancouver Island Ocean Fall (South) | Tofino Creek: Relative abundance (type-5) | 2009 | 2013 |
| DU24 West Vancouver Island Ocean Fall (South) | Tofino Creek: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Toquart River: Presence-absence (type-6) | 1995 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Toquart River: Relative abundance (type-3) | 1998 | 2002 |
| DU24 West Vancouver Island Ocean Fall (South) | Toquart River: Relative abundance (type-4) | 1996 | 2014 |
| DU24 West Vancouver Island Ocean Fall (South) | Toquart River: Relative abundance (type-5) | 1997 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Toquart River: Unknown | 1953 | 2011 |
| DU24 West Vancouver Island Ocean Fall (South) | Tranquil Creek: Presence-absence (type-6) | 1988 | 1995 |
| DU24 West Vancouver Island Ocean Fall (South) | Tranquil Creek: Relative abundance (type-3) | 1996 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Tranquil Creek: Relative abundance (type-5) | 1992 | 1992 |
| DU24 West Vancouver Island Ocean Fall (South) | Tranquil Creek: Unknown | 1953 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Uchuck Creek: Unknown | 1953 | 1984 |
| DU24 West Vancouver Island Ocean Fall (South) | Warn bay Creek: Presence-absence (type-6) | 1995 | 1996 |
| DU24 West Vancouver Island Ocean Fall (South) | Warn bay Creek: Relative abundance (type-4) | 2003 | 2003 |
| DU24 West Vancouver Island Ocean Fall (South) | Warn bay Creek: Relative abundance (type-5) | 2004 | 2015 |
| DU24 West Vancouver Island Ocean Fall (South) | Warn bay Creek: Unknown | 1983 | 1994 |
| DU24 West Vancouver Island Ocean Fall (South) | Watta Creek: Presence-absence (type-6) | 1995 | 2010 |
| DU24 West Vancouver Island Ocean Fall (South) | Watta Creek: Unknown | 1958 | 1991 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Amai Creek: Presence-absence (type-6) | 2012 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Amai Creek: Unknown | 1954 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Artlish River: Relative abundance (type-3) | 1996 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Artlish River: Relative abundance (type-4) | 1995 | 2014 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Artlish River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Battle Bay River: Unknown | 1953 | 1996 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Black Creek: Unknown | 1995 | 1995 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Brodick Creek: Unknown | 1964 | 1992 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Burman River: Not applicable | 2014 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Burman River: Relative abundance (type-3) | 1995 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Burman River: Relative abundance (type-4) | 2004 | 2008 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Burman River: Relative abundance (type-5) | 2009 | 2009 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Burman River: True abundance (type-2) | 2002 | 2002 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Burman River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Cachalot Creek: Relative abundance (type-5) | 2003 | 2003 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Cachalot Creek: True abundance (type-1) | 2001 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Canton Creek: Relative abundance (type-3) | 2011 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Canton Creek: Relative abundance (type-5) | 2007 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Canton Creek: True abundance (type-1) | 1996 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Canton Creek: Unknown | 1953 | 1995 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chamiss Creek: Relative abundance (type-5) | 2003 | 2003 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chamiss Creek: Unknown | 1956 | 1991 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chum Creek: Presence-absence (type-6) | 2010 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chum Creek: Relative abundance (type-4) | 2002 | 2002 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chum Creek: Relative abundance (type-5) | 2006 | 2006 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chum Creek: True abundance (type-1) | 1998 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Chum Creek: Unknown | 1966 | 1995 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Clanninick Creek: Unknown | 1956 | 1989 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Conuma River: Not applicable | 2014 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Conuma River: Relative abundance (type-3) | 1995 | 2009 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Conuma River: Relative abundance (type-4) | 2004 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Conuma River: Relative abundance (type-5) | 2002 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Conuma River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Deserted Creek: Presence-absence (type-6) | 1984 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Deserted Creek: Relative abundance (type-3) | 1998 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Deserted Creek: Relative abundance (type-5) | 2001 | 2006 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Deserted Creek: Unknown | 1958 | 1990 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Easy Creek: Relative abundance (type-4) | 2003 | 2003 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Easy Creek: Relative abundance (type-5) | 2012 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Easy Creek: Unknown | 1966 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Eliza Creek: Unknown | 1962 | 1984 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Eliza East River: Presence-absence (type-6) | 2008 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Eliza East River: True abundance (type-1) | 1998 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Eliza East River: Unknown | 1996 | 1996 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Espinosa Creek: Presence-absence (type-6) | 1984 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Espinosa Creek: Relative abundance (type-5) | 1998 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Espinosa Creek: Unknown | 1962 | 1989 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Gold River: Not applicable | 1999 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Gold River: Presence-absence (type-6) | 1995 | 2010 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Gold River: Relative abundance (type-3) | 1998 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Gold River: Relative abundance (type-5) | 1996 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Gold River: Unknown | 1953 | 2006 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Hoiss Creek: Presence-absence (type-6) | 2010 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Hoiss Creek: Relative abundance (type-4) | 2002 | 2004 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Hoiss Creek: Relative abundance (type-5) | 2006 | 2008 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Hoiss Creek: True abundance (type-1) | 1998 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Hoiss Creek: Unknown | 1963 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Houston River: Unknown | 1967 | 1984 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Inner Basin River: Presence-absence (type-6) | 2010 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Jacklah River: Presence-absence (type-6) | 1984 | 1984 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Jacklah River: Unknown | 1957 | 1991 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kaouk River: Presence-absence (type-6) | 1988 | 1988 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kaouk River: Relative abundance (type-3) | 1995 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kaouk River: Relative abundance (type-4) | 2005 | 2009 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kaouk River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kapoose Creek: Unknown | 1997 | 1997 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kashutl River: Presence-absence (type-6) | 2011 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kashutl River: Unknown | 1953 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kauwinch River: Presence-absence (type-6) | 1996 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kauwinch River: Relative abundance (type-4) | 2015 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kauwinch River: Relative abundance (type-5) | 2001 | 2014 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kauwinch River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kleeptee Creek: Presence-absence (type-6) | 1995 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kleeptee Creek: Relative abundance (type-4) | 2002 | 2004 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kleeptee Creek: Relative abundance (type-5) | 2006 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Kleeptee Creek: Unknown | 1961 | 1992 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Leiner River: Not applicable | 2014 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Leiner River: Relative abundance (type-3) | 2002 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Leiner River: Relative abundance (type-4) | 1995 | 2000 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Leiner River: Relative abundance (type-5) | 2001 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Leiner River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Little Zeballos River: Presence-absence (type-6) | 1984 | 1999 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Little Zeballos River: Relative abundance (type-3) | 1998 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Little Zeballos River: Relative abundance (type-4) | 2002 | 2008 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Little Zeballos River: Relative abundance (type-5) | 2000 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Little Zeballos River: Unknown | 1953 | 1979 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Malksope River: Presence-absence (type-6) | 1984 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Malksope River: Relative abundance (type-4) | 2002 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Malksope River: Relative abundance (type-5) | 2014 | 2014 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Malksope River: Unknown | 1954 | 1992 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Mamat Creek: Unknown | 1962 | 1984 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Marvinas Bay Creek: Presence-absence (type-6) | 2011 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Marvinas Bay Creek: Relative abundance (type-4) | 2002 | 2005 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Marvinas Bay Creek: Unknown | 1984 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Mckay Cove Creek: Unknown | 1953 | 1996 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Mooyah River: Presence-absence (type-6) | 1984 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Mooyah River: Relative abundance (type-4) | 2002 | 2004 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Mooyah River: Relative abundance (type-5) | 1999 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Mooyah River: Unknown | 1953 | 1987 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Muchalat River: Not applicable | 2003 | 2004 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Muchalat River: Relative abundance (type-5) | 2002 | 2002 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Muchalat River: True abundance (type-1) | 2001 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Muchalat River: Unknown | 2005 | 2005 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Narrowgut Creek: Presence-absence (type-6) | 2011 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Narrowgut Creek: Unknown | 1958 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Nasparti River: Unknown | 1958 | 1995 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Oktwanch River: Relative: constant multi-year methods | 1996 | 1996 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Oktwanch River: True abundance (type-1) | 2001 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Ououkinsh River: Presence-absence (type-6) | 1984 | 1996 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Ououkinsh River: Relative abundance (type-4) | 2002 | 2002 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Ououkinsh River: Relative abundance (type-5) | 2011 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Ououkinsh River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Park River: Presence-absence (type-6) | 1984 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Park River: Relative abundance (type-5) | 2006 | 2006 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Park River: Unknown | 1953 | 1980 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Power River: Unknown | 1953 | 1992 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Silverado Creek: Unknown | 1964 | 1991 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Sucwoa River: Not applicable | 2006 | 2014 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Sucwoa River: Presence-absence (type-6) | 1991 | 2010 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Sucwoa River: Relative abundance (type-3) | 2002 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Sucwoa River: Relative abundance (type-5) | 2003 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Sucwoa River: True abundance (type-1) | 1996 | 2001 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Sucwoa River: Unknown | 1958 | 2004 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsis River: Not applicable | 2014 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsis River: Relative abundance (type-3) | 2005 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsis River: Relative abundance (type-4) | 1995 | 2011 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsis River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsish River: Relative abundance (type-3) | 1995 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsish River: Relative abundance (type-4) | 1998 | 2014 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsish River: Relative abundance (type-5) | 2012 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tahsish River: Unknown | 1953 | 1994 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tatchu Creek: Unknown | 1997 | 1997 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tlupana River: Not applicable | 2014 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tlupana River: Presence-absence (type-6) | 2004 | 2007 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tlupana River: Relative abundance (type-3) | 1996 | 1998 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tlupana River: Relative abundance (type-4) | 1999 | 2003 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tlupana River: Relative abundance (type-5) | 2005 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tlupana River: Unknown | 1953 | 1995 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tsowwin River: Presence-absence (type-6) | 2012 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tsowwin River: Relative abundance (type-3) | 1996 | 1997 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tsowwin River: Relative abundance (type-4) | 1995 | 2008 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tsowwin River: Relative abundance (type-5) | 1998 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Tsowwin River: Unknown | 1953 | 1993 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Zeballos River: Not applicable | 2014 | 2015 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Zeballos River: Relative abundance (type-3) | 1996 | 1999 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Zeballos River: Relative abundance (type-4) | 1995 | 2013 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Zeballos River: Relative abundance (type-5) | 2001 | 2012 |
| DU25 West Vancouver Island Ocean Fall (Nootka and Kyuquot) | Zeballos River: Unknown | 1953 | 1994 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Benson River: Presence-absence (type-6) | 2011 | 2011 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Benson River: Relative abundance (type-5) | 2003 | 2003 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Benson River: Unknown | 1998 | 1998 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Cayeghle System: Relative abundance (type-3) | 1997 | 1998 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Cayeghle System: Relative abundance (type-5) | 1999 | 2010 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Cayeghle System: True abundance (type-2) | 2002 | 2002 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Cayeghle System: Unknown | 1955 | 1958 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Denad Creek: Unknown | 1992 | 1992 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | East Creek: Unknown | 1953 | 1993 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Goodspeed River: Not applicable | 2013 | 2013 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Goodspeed River: Relative abundance (type-4) | 2000 | 2000 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Goodspeed River: Relative abundance (type-5) | 1998 | 2001 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Goodspeed River: Unknown | 1955 | 2002 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Keith River: Presence-absence (type-6) | 2000 | 2000 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Keith River: Unknown | 1980 | 1980 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Klaskish River: Presence-absence (type-6) | 1984 | 1984 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Klaskish River: Relative abundance (type-4) | 1995 | 1998 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Klaskish River: Unknown | 1953 | 1992 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Klootchlimmis Creek: Presence-absence (type-6) | 2000 | 2000 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Klootchlimmis Creek: Unknown | 1998 | 2002 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Mahatta Creek: Unknown | 1953 | 1984 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Marble River: Presence-absence (type-6) | 1995 | 1995 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Marble River: Relative abundance (type-3) | 2012 | 2012 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Marble River: Relative abundance (type-4) | 1996 | 2015 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Marble River: Relative abundance (type-5) | 2001 | 2013 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Marble River: Unknown | 1954 | 1994 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Stephens Creek: Unknown | 1991 | 1991 |
| DU26 West Vancouver Island Ocean Fall (WVI + WQCI) | Washlawlis Creek: Unknown | 1984 | 1993 |
| DU27 Southern Mainland Ocean Summer | Cumsack Creek:Unknown | 1953 | 1970 |
| DU27 Southern Mainland Ocean Summer | Homathko River: Presence-absence (type-6) | 1995 | 1997 |
| DU27 Southern Mainland Ocean Summer | Homathko River: Relative abundance (type-4) | 2011 | 2011 |
| DU27 Southern Mainland Ocean Summer | Homathko River: Unknown | 1953 | 1993 |
| DU28 Southern Mainland Stream Summer | Klinaklini River: Presence-absence (type-6) | 1995 | 1996 |
| DU28 Southern Mainland Stream Summer | Klinaklini River: Relative abundance (type-3) | 1997 | 2000 |
| DU28 Southern Mainland Stream Summer | Klinaklini River: True abundance (type-2) | 2001 | 2003 |
| DU28 Southern Mainland Stream Summer | Klinaklini River: Unknown | 1953 | 1994 |
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