WDFW & Ecology 2008: HSI Coho Spawning Depth
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Species Common Name
Coho Salmon
Latin Name (Genus species)
Oncorhynchus kisutch
Stressor Name
Depth
Specific Stressor Metric
Water Depth (total depth at redd)
Stressor Units
m
Vital Rate (Process)
Habitat Suitability Index
Geography
Quinault River tributary, Washington
Detailed SR Function Description
Recommended spawning depth preference curve for Coho Salmon used in Washington PHABSIM/IFIM instream flow studies. Suitability is 0 below ~0.14 m, rises to optimum at ~0.62 m, and declines to near zero (0.01) by ~1.0–1.2 m. Plotted depths converted from feet to metres; the source's 99 ft terminal value (0.01) is omitted, so the last value (0.01 at 1.22 m) should be held for deeper water.
Stressor-response relationship data sourced from: FIGURE 4a. Coho Salmon (O. kisutch) Spawning Depth Preference, Dewatto River and Fletcher Canyon Creek (Quinault tributary) (2 studies, 30 redds) - Recommended depth preference curve (p. 44).
Stressor-response relationship data sourced from: FIGURE 4a. Coho Salmon (O. kisutch) Spawning Depth Preference, Dewatto River and Fletcher Canyon Creek (Quinault tributary) (2 studies, 30 redds) - Recommended depth preference curve (p. 44).
Function Derivation
Recommended (smoothed, expert-adjusted) curve derived from observed redd depth use relative to availability.
Transferability of Function
Developed for western Washington coastal streams; consult WDFW/Ecology before local application.
Source of stressor Data
Redd microhabitat measurements (2 studies, 30 redds) compared with available habitat, following WDFW–Ecology instream flow study guidelines.
Function Type
continuous
Stressor Scale
linear
References Cited
Washington Department of Fish and Wildlife & Washington Department of Ecology. (2008). Instream flow study guidelines: Technical and habitat suitability issues including fish preference curves (Publication No. 04-11-007; updated April 5, 2004; error correction update February 12, 2008). Washington Department of Fish and Wildlife.
Citation Link
Images
Stressor Response csv data
WDFW 2004 HSI Coho Spawning Depth.csv
(169 bytes)
| Raw Stressor Values | Scaled Response Values 0 to 100 | SD | low.limit | up.limit |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 100 |
| 0.137 | 0 | 0 | 0 | 100 |
| 0.351 | 75 | 0 | 0 | 100 |
| 0.625 | 100 | 0 | 0 | 100 |
| 0.991 | 9 | 0 | 0 | 100 |
| 1.219 | 1 | 0 | 0 | 100 |
Stressor Response Chart
Mean Response
±1 Standard Deviation
Upper/Lower Limits