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Predation of juvenile salmonids by smallmouth bass and northern squawfish in the Columbia River near Richland, Washington

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Publication Date

Citation

Roger A. Tabor, Rip S. Shively, and Thomas P. Poe, 1993, Predation of juvenile salmonids by smallmouth bass and northern squawfish in the Columbia River near Richland, Washington: North American Journal of Fisheries Management, v. 13, iss. 4.

Summary

The importance of juvenile salmonids in the diet of smallmouth bass Micropterus dolomieu and northern squawfish Ptychocheilus oregonensis was examined at a 6-km stretch of the Columbia River. Piscivorous fish were sampled with electrofishing gear on 4 d (May 2–3 and June 20–21, 1990) during emigration of juvenile anadromous salmonids. Sixty-two smallmouth bass and 69 northern squawfish were collected for diet analysis. Juvenile salmonids made up 59% of smallmouth bass diet by weight and were present in 65% of the stomachs of smallmouth bass. By a meal turnover method, smallmouth bass were estimated to consume from 1.4 (May 2–3) to 1.0 (June 20–21) salmonids per predator daily. Crayfish were the dominant prey item (41.4% by weight) [...]

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Type Scheme Key
local-index unknown 70180654
local-pk unknown 70180654
series unknown North American Journal of Fisheries Management

Citation Extension

journalNorth American Journal of Fisheries Management
parts
typevolume
value13
typeissue
value4
languageEnglish
citationTypeArticle

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