Generic Cover and Salmon Trout Rearing
mbayly
View all records in the stressor response library
Species Common Name
Salmon and Trout (generalized)
Stressor Name
Cover
Specific Stressor Metric
Cover Class Categorical
Stressor Units
(see notes)
Vital Rate (Process)
HSI
Life Stage
Activity
Rearing
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
0.1 - undercut bank
0.2 - overhanging vegetation near or touching water
0.3 - rootwad (including partly undercut)
0.4 - log jam/submerged brush pile
0.5 - log(s) parallel to bank
0.6 - aquatic vegetation
0.7 - short (<1 foot) terrestrial grass
0.8 - tall (>3 feet) dense grass
0.9 - vegetation > 3 vertical ft above SZF
Source: TABLE 1. Generic Cover/Substrate Codes and Preference Value
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
0.1 - undercut bank
0.2 - overhanging vegetation near or touching water
0.3 - rootwad (including partly undercut)
0.4 - log jam/submerged brush pile
0.5 - log(s) parallel to bank
0.6 - aquatic vegetation
0.7 - short (<1 foot) terrestrial grass
0.8 - tall (>3 feet) dense grass
0.9 - vegetation > 3 vertical ft above SZF
Source: TABLE 1. Generic Cover/Substrate Codes and Preference Value
Function Type
step
Stressor Scale
linear
Citation(s)
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
Images
Stressor Response csv data
sr_curve_0.csv
(223 bytes)
| Raw Stressor Values | Scaled Response Values 0 to 100 | SD | low.limit | up.limit |
|---|---|---|---|---|
| 0.1 | 100 | 0 | 0 | 100 |
| 0.2 | 100 | 0 | 0 | 100 |
| 0.3 | 100 | 0 | 0 | 100 |
| 0.4 | 100 | 0 | 0 | 100 |
| 0.5 | 80 | 0 | 0 | 100 |
| 0.6 | 80 | 0 | 0 | 100 |
| 0.7 | 10 | 0 | 0 | 100 |
| 0.8 | 70 | 0 | 0 | 100 |
| 0.9 | 20 | 0 | 0 | 100 |
Stressor Response Chart