River darter (Percina shumardi), various populations, COSEWIC assessment and status report 2016

Official title: COSEWIC Assessment and Status Report on the River Darter Percina shumardi - Saskatchewan – Nelson River populations Southern Hudson Bay – James Bay populations - Great Lakes-Upper St. Lawrence populations in Canada - 2016

• Next page

Table of contents

• COSEWIC Status Report
• Appendix 1-3
• Appendix 4. All known collection records of River Darter in Canada

Saskatchewan - Nelson River populations - Not at risk
Southern Hudson Bay - James Bay populations - Not at risk
Great Lakes - Upper St. Lawrence populations - Endangered

2016

Table of contents

• Table of contents
• Assessment summary
• Executive summary
• Technical summary - DU1
• Technical summary - DU2
• Technical summary - DU3
• Preface
• Wildlife species description and significance
  • Name and classification
  • Morphological description
  • Population spatial structure and variability
  • Designatable units
  • Special significance
• Distribution
  • Global range
  • Canadian range
    • DU1 - Saskatchewan - Nelson river populations
    • DU2 - Southern Hudson Bay - James Bay populations
    • DU3 - Great Lakes - upper St. Lawrence populations
  • Search effort
    • DU1 – Saskatchewan - Nelson river biogeographic zone
    • DU2 – Southern Hudson Bay - James Bay biogeographic zone
    • DU3 – Great Lakes - Upper St. Lawrence biogeographic zone
• Habitat
  • Habitat requirements
  • Habitat trends
• Biology
  • Life cycle
  • Reproduction
  • Feeding
  • Physiology and adaptability
  • Dispersal and migration
• Population sizes and trends
  • DU1 – Saskatchewan - Nelson river biogeographic zone
    • Sampling effort and methods
    • Abundance
    • Fluctuations and trends
    • Rescue effect
  • DU2 – Southern Hudson Bay - James Bay biogeographic zone
    • Sampling effort and methods
    • Abundance
    • Fluctuations and trends
    • Rescue effect
  • DU3 – Great Lakes - Upper St. Lawrence biogeographic zone
    • Sampling effort and methods
    • Abundance
    • Fluctuations and trends
    • Rescue effect
• Threats and limiting factors
  • Exotic species
  • Shoreline hardening
  • Contaminants and toxic substances
  • Sediment loadings
  • Impoundments
  • Physical alteration/modification of habitat
  • Number of locations
• Protection, status and ranks
  • Legal protection and status
  • Non-legal status and ranks
  • Habitat protection and ownership
• Aboriginal traditional knowledge
• Acknowledgements and authorities contacted
• Information sources
• Biographical summary of report writer(s)
• Collections examined

List of figures

• Figure 1. Male River Darter collected from the Bird River, Manitoba.
• Figure 2. Global distribution of the River Darter.
• Figure 3. The distribution of River Darter in DU1 - Saskatchewan - Nelson River populations. Occurrences are shown for three time periods and EOO is plotted for all time periods combined.
• Figure 4. The distribution of River Darter in DU2 - Southern Hudson Bay - James Bay populations. Occurrences are shown for two time periods and EOO is plotted for both time periods combined.
• Figure 5. The distribution of River Darter in DU3 - Great Lakes - Upper St. Lawrence populations. Occurrences are shown for pre-2005 and 2005-2014 and EOO is plotted for each time period.

List of tables

• Table 1. Summary of surveys in the known range of the River Darter since 1989 for DU1, DU2 and DU3.
• Table 2. Summary of DFO non-targeted sampling in DU1 and 3 since 1995.
• Table 3. Summary of DFO targeted sampling conducted with a mini-Missouri trawl, in DU1 and 2 in 2013 and 2014 (modified from Pratt et al. 2015).
• Table 4. Mean measured habitat parameters, including depth, temperature, pH, turbidity, and dissolved oxygen, from selected River Darter collection sites (modified from Pratt et al. 2015).
• Table 5. Mean total length (lt), length range (mm), mean weight (g), sex ratio, mean age (yrs), and age range for River Darter captured and assessed from DFO-led surveys. Numbers in brackets represent ± standard error (modified from Pratt et al. 2015).
• Table 6. Most common diet items in ten River Darter populations collected in 2013-2014 (modified from Pratt et al. 2015).

List of appendices

• Appendix 1. Threats assessment calculator DU1.
• Appendix 2. Threats assessment calculator DU2.
• Appendix 3. Threats assessment calculator DU3.
• Appendix 4. All known collection records of River Darter in Canada