Exxon Valdez oil spill. State/federal natural resource damage assessment final report. Sockeye salmon overescapement. Fish/shellfish study number 27
Technical Report
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OSTI ID:107898
The authors examined the effects of large escapements of sockeye salmon in to the Kenai River and into Red and Akalura Lakes on Kodiak Island. Estimated smolt numbers outmigrating from the Kenai River decreased from 30 million in 1989 to under 500,000 in 1992. Decreased overwintering survival of age-0 juvenile sockeye salmon rearing in Skilak and Kenai lakes is the major contributor to this decline. Preliminary examination of limnological data from Skilak and Kenai Lakes provided no obvious explanation for this major decline in winter survival of juvenile sockeye. Due to differences in diel vertical migration of zooplankton among glacial lakes on the Kenai Peninsula with varying planktivores levels, the authors hypothesize that behavioral changes of zooplankton induced by predation may be a major contributor to the juvenile sockeye decline.
- Research Organization:
- Alaska Dept. of Fish and Game, Soldotna, AK (United States). Commercial Fisheries Management and Development Div.
- OSTI ID:
- 107898
- Report Number(s):
- PB--95-966013/XAB
- Country of Publication:
- United States
- Language:
- English
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