Fall Chinook Salmon Spawning Ground Surveys in the Snake River Basin Upriver of Lower Granite Dam, Annual Report 2002.
Redd counts were used to document the spawning distribution of fall chinook salmon (Oncorhynchus tshawytscha) in the Snake River basin upriver of Lower Granite Dam. The first reported redd counts were from aerial searches conducted intermittently between 1959 and 1978 (Irving and Bjornn 1981, Witty 1988; Groves and Chandler 1996)(Appendix 1). In 1986, the Washington Department of Fish and Wildlife began an annual monitoring program that, in addition to the Snake River, included aerial searches of the Grande Ronde River the first year (Seidel and Bugert 1987), and the Imnaha River in subsequent years (Seidel et al. 1988; Bugert et al. 1989-1991; Mendel et al. 1992). The U. S. Fish and Wildlife Service and Idaho Power Company began contributing to this effort in 1991 by increasing the number of aerial searches conducted each year and adding underwater searches in areas of the Snake River that were too deep to be searched from the air (Connor et al. 1993; Garcia et al. 1994a, 1994b, 1996-2001; Groves 1993; Groves and Chandler 1996). The Nez Perce Tribe added aerial searches in the Clearwater River basin beginning in 1988 (Arnsberg et. al 1992) and the Salmon River beginning in 1992. Currently searches are conductedmore »
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- OSTI Identifier:
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- Resource Type:
- Technical Report
- Research Org:
- Bonneville Power Administration (BPA), Portland, OR
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- Country of Publication:
- United States
- 54 ENVIRONMENTAL SCIENCES; BONNEVILLE POWER ADMINISTRATION; DISTRIBUTION; GRANITES; MONITORING; RIVERS; SALMON; US FWS Chinook salmon - Nests - Counting - Snake River Watershed (Wyo.-Wash.); Chinook salmon - Spawning - Snake River Watershed (Wyo.-Wash.) - Statistics
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