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

River Darter
Photo: © D.A. Watkinson, 2016

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

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

 

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