| Physiological responses of free-swimming adult coho salmon to simulated predator and fisheries encounters. | |
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MedLine Citation:
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PMID: 20961224 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The responses of free-swimming adult coho salmon (Oncorhynchus kisutch) to simulated predator and fisheries encounters were assessed by monitoring heart rate (f(H)) with implanted data loggers and periodically taking caudal blood samples. A 10- or 30-min corralling treatment was conducted to simulate conspecifics being cornered by a predator or corralled by fisheries gear without physical contact. Corralling rapidly doubled f(H) from ∼31 beats min(-1) to a maximum of ∼60 beats min(-1), regardless of the duration of the corralling. However, recovery of f(H) to precorralling levels was significantly faster after the 10-min corralling (7.6 h) than after the 30-min corralling (11.5 h). An exhaustive-exercise treatment (chasing for 3 min, with physical contact) to simulate a predator chasing a fish to exhaustion or a fish becoming exhausted after encountering fisheries gear resulted in increased f(H) (to 60 beats min(-1)), plasma lactate, glucose, sodium, osmolality, and cortisol (males only) and a significant decrease in mean corpuscular hemoglobin concentration. Recovery of f(H) and most blood variables was complete about 16 h after exhaustive exercise and handling. The results illustrate a clear relationship between the intensity of exercise and the duration required for recovery of f(H). Changes in f(H) were significantly correlated with those in plasma lactate, chloride, and sodium at 1 h after the exercise treatment protocols. Thus, measurements of f(H) may provide an accurate indication of the general physiological response of salmonids to exhaustive exercise in the natural environment. |
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Authors:
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M R Donaldson; T D Clark; S G Hinch; S J Cooke; D A Patterson; M K Gale; P B Frappell; A P Farrell |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-10-20 |
Journal Detail:
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Title: Physiological and biochemical zoology : PBZ Volume: 83 ISSN: 1537-5293 ISO Abbreviation: Physiol. Biochem. Zool. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-09 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883369 Medline TA: Physiol Biochem Zool Country: United States |
Other Details:
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Languages: eng Pagination: 973-83 Citation Subset: IM |
Affiliation:
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Pacific Salmon Ecology and Conservation Laboratory, Centre for Applied Conservation Research, and Department of Forest Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada. michael.r.donaldson@gmail.com |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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