Physiological Effects of Capturing Striped Bass in Gill Nets and Fyke Traps
作者:
ToddE. Hopkins,
JosephJ. Cech,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1992)
卷期:
Volume 121,
issue 6
页码: 819-822
ISSN:0002-8487
年代: 1992
DOI:10.1577/1548-8659(1992)121<0819:PEOCSB>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Adult striped bassMorone saxatiliswere captured in 20–40-min gill-net sets in the San Joaquin River, California, and in 24–48-h fyke-trap sets in the Sacramento River as part of a tagging program. They were bled by cardiac puncture for various measurements of stress responses to capture and handling. Fish caught in gill nets were more lethargic, were kept longer out of water, and were significantly more acidotic (lower blood pH and higher lactate concentration) than fyke-trapped fish. Gillnetted fish also had a significantly higher Pco2, hematocrit, and plasma glucose and potassium concentrations than fyke-trapped fish. Both capture methods induced secondary stress responses, but responses were greater in gillnetted fish, probably because gill nets restricted buccal and opercular movements.
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