Beecher 2004: HSI Coho and Juvenile Velocity
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Species Common Name
Coho Salmon
Latin Name (Genus species)
Oncorhynchus kisutch
Stressor Name
Velocity
Specific Stressor Metric
Water Velocity
Stressor Units
m/s
Vital Rate (Process)
Habitat Suitability Index
Geography
Pacific Northwest
Key Covariates and Dependencies
fine-to-coarse gravel configurations (2 mm to 64 mm)
Small- to medium-sized wadeable streams
gravel-bed pool-riffle sequences
Detailed SR Function Description
These empirical, frequency-of-use values are derived from standard Washington Department of Fish and Wildlife Instream Flow Study Guidelines and regional Pacific Northwest monitoring. They assume a strict behavioral preference for slow pool margins.
Stressor-response relationship data sourced from: FIGURE 5b. Coho Salmon Juvenile Velocity Preference Recommended velocity preference curve (p.g., 45).
Stressor-response relationship data sourced from: FIGURE 5b. Coho Salmon Juvenile Velocity Preference Recommended velocity preference curve (p.g., 45).
Function Derivation
Empirical frequency-of-use (use/availability) data, smoothed into a recommended curve.
Transferability of Function
Western Washington streams; frequency-based curves may not reflect habitat quality at high fish densities.
Source of stressor Data
Snorkel observations of juvenile coho microhabitat use (4 studies, 451 fish) relative to measured habitat availability.. Instream flow study criteria.
Function Type
continuous
Stressor Scale
linear
References Cited
Beecher, H. A., Carleton, B. A., & Fricke, T. F. (2002). Evaluation of depth and velocity preferences of juvenile coho salmon in Washington streams. Northwest Science, 76(4), 314–325.
Citation Link
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Stressor Response csv data
demo_sr_1.csv
(196 bytes)
| Raw Stressor Values | Scaled Response Values 0 to 100 | SD | low.limit | up.limit |
|---|---|---|---|---|
| 0 | 78 | 0 | 0 | 100 |
| 0.046 | 100 | 0 | 0 | 100 |
| 0.091 | 96 | 0 | 0 | 100 |
| 0.137 | 31 | 0 | 0 | 100 |
| 0.183 | 20 | 0 | 0 | 100 |
| 0.366 | 16 | 0 | 0 | 100 |
| 0.61 | 0 | 0 | 0 | 100 |
Stressor Response Chart
Mean Response
±1 Standard Deviation
Upper/Lower Limits