Physical parameters associated with coho salmon redds in northwest California
Regnart JR. 1991. Physical parameters associated with coho salmon redds in northwest California. Humboldt State University
A Master of Science thesis from Humboldt State University, California. Taken from abstract: "Substrate composition, water depth, water velocity, and water temperature were measured at coho salmon (Oncorhynchus kisutch) redds in six northern California coastal streams of varying sizes. At each redd a gravel sample was taken with a McNeil sampler from inside and outside the redd to determine differences between the two samples in Fredle index and percent fines (<2mm). Forty six redds were sampled during the 1989-1990 spawning season. Mean Fredle index values ranged from 6.0 to 12.5 outside the redd and 8.7 to 20.3 inside the redd; percent fines ranged from 3.5 to 17.3 outside the redd and 1.5 to 10.1 inside, indicating suitable spawning gravel at all redds. Mean stream velocities at coho salmon redds ranged from 0.11 to 0.51 m/s. Mean spawning depth was from 0.13 to 0.27 m. Water temperature at time of spawning ranged from 3.9 to 8.9 C. Mean water depth and velocity differed significantly between the six streams. The Fredle index and percent fines were significantly different between sample sites."
- Type
- Academic
- Authors
- Regnart, Jeff
- Date of Issue
- 1991-09
- Publisher
- Humboldt State University
- Units
- KLMN , REDW
- Keywords
- Bill Jong Collection; camp creek; carcass; freshwater creek; lost man creek; rush creek; trinity river; weaver creek, Coho Salmon, Fish Habitat, Lost Man Creek, Oncorhynchus kisutch, Prarire Creek Bibliography, Redd, spawn, Stream, substrate composition, Thesis