Predation of Karluk River sockeye salmon by coho salmon and char

Fishery Bulletin
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The number of sockeye salmon, Oncorhynchus nerka, in Alaska's Karluk River (Fig. 1) declined from millions to thousands during the early part of the present century. Rounsefell (1958) discussed alternative explanations for the decline including a general loss offertility ofthe system as the number of salmon carcasses declined, competition, overfishing, subtle changes in climate, and predation; he concluded that the combined effect of predation and fishing was the most probable explanation. Later, Van Cleave and Bevan (1973) suggested that the weir constructed in the river each year to facilitate counting the fish as they entered the system was the most probable cause ofthe decline. Itprevented free movement of both adults and juveniles in the river. All of these hypotheses remain as potential explanations for the decline

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Publication type Article
Publication Subtype Journal Article
Title Predation of Karluk River sockeye salmon by coho salmon and char
Series title Fishery Bulletin
Volume 86
Issue 3
Year Published 1988
Language English
Publisher National Marine Fisheries Service
Contributing office(s) Western Fisheries Research Center
Description 6 p.
First page 611
Last page 616
Country United States
State Alaska
Other Geospatial Karluk Lake, Karluk River, Kodiak Island
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