Northwest Fisheries Science Center

Display All Information

Document Type: Report
Center: NWFSC
Document ID: 8946
Title: Contribution of 1975-brood Snake River fall Chinook slamon Oncorhynchus tshawytscha to Pacific coast and Columbia River fisheries
Author/Editor: Lyle G. Gilbreath, Larry R. Basham, Emil Slatick
Year: 1986
City: Seattle
Institution: Report of the Northwest and Alaska Fisheries Center

Harvest information on a unique stock of Snake River fall Chinook salmon is presented in response to management information needs outlined in the Columbia River Basin Fish and Wildlife Program.  Data from fish marked with coded wire tags were examined to determine the contribution of marked 1975- brood Snake River fall chinook salmon, Oncorhynchus tshawytscha, to Pacific coast and Columbia River salmon fisheries.  Of 50,400 marked fish released, 180 were recovered by fisheries samplers from 1977 through 1980.  Based on these recoveries, the estimated contribution to combined ocean and Columbia River salmon fisheries was 667 fish (13.2 fish caught/1,000 released).  Four user groups accounted for 93% of the estimated catch as follows:  Canadian troll fishery, 38%; Alaskan troll fishery, 26 %; Columbia River treaty Indian set-net fishery, 20%; and Columbia River drift-net fishery, 9%.