Generic Substrate and Bull Trout
mbayly
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Species Common Name
Bull Trout
Latin Name (Genus species)
Salvelinus
species (latin)
confluentus
Stressor Name
Substrate
Specific Stressor Metric
Substrate Class Categorical
Stressor Units
(see notes)
Vital Rate (Process)
HSI
Life Stage
Activity
Spawning
Geography
Washington
Detailed SR Function Description
WDFW and Ecology recommended Habitat Suitability Criteria (HSC) or preference codes and values for instream flow modeling using PHABSIM or RHABSIM models. These values are based on habitat suitability studies. WDFW and/or Ecology staff (or individuals following WDFW-Ecology study guidelines) recorded the depth, velocity, substrate, and cover used by fish in a study reach.
Recommended Preferences do not always accurately reflect local conditions. Therefore, these preference values should only be used after consultation with and written agreement of WDFW and/or Ecology instream flow biologists. HSI preference curves are being revised continually as new data are obtained and analyzed. Please contact the Department of Ecology or WDFW for the most recent preference curves for salmon, trout, and other game fishes.
Cover Classes
1 - silt, clay, or organic
2 - sand
3 - sm gravel (0.1-.5")
4 - med gravel (.5-1.5")
5 - Irg gravel (1.5-3")
6 - sm cobble (3-6")
7 - Irg cobble (6-12")
8 - boulder (>12')
9 - bedrock
TABLE 14. Bull Trout (Salvelinus confluentus) and Dolly Varden (S. malma) Spawning
Substrate Preference Data 4 streams, 34 redds. For the full table of 3 digit codes, use Table 6.
Recommended Preferences do not always accurately reflect local conditions. Therefore, these preference values should only be used after consultation with and written agreement of WDFW and/or Ecology instream flow biologists. HSI preference curves are being revised continually as new data are obtained and analyzed. Please contact the Department of Ecology or WDFW for the most recent preference curves for salmon, trout, and other game fishes.
Cover Classes
1 - silt, clay, or organic
2 - sand
3 - sm gravel (0.1-.5")
4 - med gravel (.5-1.5")
5 - Irg gravel (1.5-3")
6 - sm cobble (3-6")
7 - Irg cobble (6-12")
8 - boulder (>12')
9 - bedrock
TABLE 14. Bull Trout (Salvelinus confluentus) and Dolly Varden (S. malma) Spawning
Substrate Preference Data 4 streams, 34 redds. For the full table of 3 digit codes, use Table 6.
Function Type
step
Stressor Scale
linear
References Cited
Beecher, H., Caldwell, B. (2022). INSTREAM FLOW STUDY GUIDELINES. Technical and Habitat Suitability Issues Including Fish Preference Curves. UPDATED, January 25, 2022. 04-11-007
Citation Link
Stressor Response csv data
14_bulltrout.csv
(200 bytes)
| Raw Stressor Values | Scaled Response Values 0 to 100 | SD | low.limit | up.limit |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 100 |
| 2 | 0 | 0 | 0 | 100 |
| 3 | 100 | 0 | 0 | 100 |
| 4 | 100 | 0 | 0 | 100 |
| 5 | 100 | 0 | 0 | 100 |
| 6 | 70 | 0 | 0 | 100 |
| 7 | 70 | 0 | 0 | 100 |
| 8 | 0 | 0 | 0 | 100 |
| 9 | 0 | 0 | 0 | 100 |
Stressor Response Chart