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Identification of Columbia Basin Sockeye Salmon Stocks Based on Scale Pattern Analyses, 1990

Mar 25, 1991


Sockeye Salmon (Oncorhynchus nerka Walbaum) is one of five species of Pacific salmon native to the Columbia River Basin. Before White settlers developed the region, the Columbia Basin supported a Sockeye Salmon run estimated to have averaged more than three million fish annually (Northwest Power Planning Council 1986). Since the mid-1800s, however, this Sockeye population has severely declined. The estimated number of Sockeye Salmon entering the Columbia River over the ten year period from 1980 through 1989 has averaged only about 98,000 fish (King and McIsaac 1990). In both 1989 and 1990, fewer than 50,000 Sockeye Salmon returned to the Columbia Basin (CRITFC 1990).



Fryer, J. and M. Schwartzberg. 1991. Identification of Columbia Basin Sockeye Salmon stocks based on scale pattern analyses, 1990. Columbia River Inter-Tribal Fish Commission Technical Report 91-2. Portland, OR. 46p.



Report No.


Media Type

CRITFC Technical Report