Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 9152
Title: Effect of increased water temperatures on survival of adult threespine stickleback and juvenile yellow perch in the Columbia River
Author: Theodore H. Blahm, George R. Snyder
Publication Year: 1975
Journal: Northwest Science
Volume: 49
Issue: 4
Pages: 267-270
Keywords: Temperature stress, survival, yellow perch, threespine stickleback,

Flow-through bioassay tests on the effects of temperature increases on yellow perch Perca flavescens and threespine stickleback Gasterosteus aculeatus were conducted on the lower Columbia River near Prescott, Oregon.  The on-site tests of two weeks' duration were performed on (1) control samples of fish at a water temperature of 19°C and (2) test samples of fish at water temperatures of 20-26°C—in 1-degree increments—and at 29, 32, and 38°C.  Samples of threespine stickleback reached 50% mortality at 25°C in 1,725 minutes, and samples of yellow perch reached 50% mortality in 143 minutes.