- adult salmon passage


adult salmon passage -

The Fish Passage Center (FPC) provides current and historic data on salmon and steelhead passage in the main stem Snake and Columbia river basins. Data from the Smolt Monitoring Program (SMP) is intended to provide the information basis for federal, state and tribal recommendations for fish passage in the Federal Columbia River Hydro-electric System. Integrate adult lamprey passage assessment and needs into a new anadromous fish migration and passage recommendation in a new Spirit of the Salmon Plan. Until then, see updated technical recommendation Lamprey.

A minimum estimate of the cumulative losses of fall chinook adult salmon due to passage through eight hydroelectric projects is 39% (NMFS 1995). State and tribal fishery managers estimate that the loss was approximately 50% on average from 1988 to 1993. Passage Rates. Most adult salmon and steelhead pass individual dams in 1 to 2 d, and pass quickly through reservoirs. However, a proportion of each run (typically between 2–12%) has taken several days to weeks to pass individual dams.

Passage of Adult Salmon and Trout Through Pipes' BY EMIL SLATICK, Fishery Biologist Bureau of Commercial Fisheries Biological Laboratory Seattle, Washington 98102 ABSTRACT Pipes, which are relatively inexpensive and easily installed, are an economical and efficient solution to certain problems of fish passage at dams and at other ob-.