Effects of sediments from the Redwood National Park bypass project (CALTRANS) on anadromous salmonids in Prairie Creek State Park 1995-1998: Review draft
Roelofs TD and Sparkman MD. 1999. Effects of sediments from the Redwood National Park bypass project (CALTRANS) on anadromous salmonids in Prairie Creek State Park 1995-1998: Review draft
From the Abstract: "A large storm in October 1989 deposited sediments from the highway 101 bypass project in several Prairie Creek and Klamath River tributaries. We studied chinook and coho salmon in sections of Prairie Creek upstream and downstream of the sediments produced in this event. Many chinook salmon and fewer coho salmon spawn in Prairie Creek below Browns Creek (the area impacted by the sediment input). Similar numbers of redds were observed during the three spawning seasons, with chinook salmon comprising 74 percent of the salmon associated with redds during the three spawning seasons. Emergent nets placed over redds in the impacted sections captured fewer fry than emergent nets over redds upstream of Browns Creek. Stream gravel characteristics (percent fines, geometric mean diameter, and fredle index) were similar above and below Browns Creek. Fry emergence numbers and downstream migrating age 0+ chinook and coho salmon were lowest in 1998. The numbers of coho salmon smolts (age 1+) was more consistent from year to year, and may indicate that overwinter survival limits coho salmon production in Prairie Creek." The appendices contain spawning survey data and statistical results.
- Type
- Published Report
- Authors
- Roelofs, Terry; Sparkman, Michael
- Date of Issue
- 1999-04
- Units
- REDW
- Keywords
- boyes creek, browns creek, carcass; coastal cutthroat trout, Chinook Salmon, Coho Salmon, Dissolved Oxygen, emergence, emergent nets, Fish Studies, fry, godwood creek, gravel permeability, Impacts, klamath river, NCCCSI, Oncorhynchus kisutch, Oncorhynchus mykiss, Oncorhynchus tshawytscha, outmigration, Prairie Creek, Prairie Creek Bibliography, Prairie Creek Redwoods State Park, Redds, Redwood creek, research projects, rotary screw trap, Salmonid Species, Sediment, spawner, Spawning Survey, Steelhead Trout, Trapping Bill Jong Collection