Identification of Columbia Basin Sockeye Salmon Stocks Using Scale Pattern Analysis in 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 suffered a severe decline. The estimated number of sockeye salmon entering the Columbia River over the last three years (198-1991) has average only about 55,000 fish (CRITFC 1991).
Fryer, J.K., C.E. Pearson, and M. Schwartzberg. 1992. Identification of Columbia Basin Sockeye stocks based on scale pattern analyses 1991. Columbia River Inter-Tribal Fish Commission Technical Report 92-2. 35p.