Temperature Effects on Swimming Performance of Larval and Juvenile Colorado Squawfish: Implications for Survival and Species Recovery
作者:
MichaelR. Childs,
RobertW. Clarkson,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1996)
卷期:
Volume 125,
issue 6
页码: 940-947
ISSN:0002-8487
年代: 1996
DOI:10.1577/1548-8659(1996)125<0940:TEOSPO>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We determined prolonged swimming ability of larval and juvenile Colorado SquawfishPtychocheilas luciusat 10, 14, and 20°C. Fatigue velocity (velocity at which 50% of the fish failed to sustain swimming in 30-min tests) increased significantly with water temperature and fish length. Differences in swimming ability between 10 and 14°C became less pronounced as fish length increased, but differences remained substantial between the two cooler and the 20°C swimming experiments for all size-classes tested. We conclude that cold hypolimnetic releases from hydroelectric dams can significantly reduce prolonged swimming ability of young-of-year Colorado Squawfish, and may help explain the decline of this species in the Colorado River basin.
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