Continuous Deep Pool Length and Salish Sucker System Capacity
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Species Common Name
Salish Sucker
Latin Name (Genus species)
Catostomus sp.
Stressor Name
Length of continuous deep pool
Specific Stressor Metric
Length of continuous deep pool (>70 cm depth)
Stressor Units
m
Vital Rate (Process)
CPUE (yoy and adult)
Geography
Lower Fraser Valley (British Columbia)
Detailed SR Function Description
We inferred a stepwise response with a threshold value of 50 m continuous pool length above 70 cm water depth based on the inferences made in Pearson (2004) and Fisheries and Oceans Canada (2019) i.e., a minimum of 50 m continuous pool with a water depth exceeding 70 cm under summer low flow conditions is required to support moderate to high densities of juvenile and adult Salish Sucker. See also the associated Salish Sucker SR function for habitat depth.
Function Derivation
DOUBLE CHECKBased on data from Salish Sucker; Empirical data (correlative model); Published
Transferability of Function
As local adaptations are likely minimal among different Salish Sucker populations, we would not expect much variation in true tolerance among populations. This function should therefore be broadly applicable to all populations of the species.
Source of stressor Data
Data on length of reaches greater than 70cm deep is available for most (but not all) reaches in Bertrand, Pepin, Fishtrap Creeks, and the Salmon River, collected as part of Pearson (2004) and subsequent field work to define critical habitat for Salish sucker.
Function Type
step
Stressor Scale
linear
Citation(s)
Usoof, A.M. and Rosenfeld, J.S. 2024. Relationship between system capacity and length of continuous deep pool for Salish Sucker.
Fisheries and Oceans Canada. 2019. Recovery strategy for the Salish Sucker ( Catostomus sp .) in Canada [Proposed]. 1st amendment. Species at Risk Act Recovery Strategy Series. Fisheries and Oceans Canada, Ottawa.
Rosenfeld, J., M. P. Pearson, J. Miners, and K. Zinn. 2021. Effects of landscape-scale hypoxia on Salish sucker and salmonid habitat associations : implications for endangered 1233:1219–1233.
Fisheries and Oceans Canada. 2019. Recovery strategy for the Salish Sucker ( Catostomus sp .) in Canada [Proposed]. 1st amendment. Species at Risk Act Recovery Strategy Series. Fisheries and Oceans Canada, Ottawa.
Rosenfeld, J., M. P. Pearson, J. Miners, and K. Zinn. 2021. Effects of landscape-scale hypoxia on Salish sucker and salmonid habitat associations : implications for endangered 1233:1219–1233.
Images
Stressor Response csv data
Data_SS_Reach length of deep pool.csv
(169 bytes)
| Length of continous pool >70 cm (m) | Mean System Capacity (%) | SD | low.limit | up.limit |
|---|---|---|---|---|
| 0.0 | 0 | 0 | 0 | 100 |
| 49.9 | 0 | 0 | 0 | 100 |
| 50.0 | 100 | 0 | 0 | 100 |
| 100.0 | 100 | 0 | 0 | 100 |
| 150.0 | 100 | 0 | 0 | 100 |
Stressor Response Chart