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Cardiorespiratory performance and blood chemistry during swimming and recovery in three populations of elite swimmers: adult sockeye salmon

Citation

Eliason, EJ and Clark, TD and Hinch, SG and Farrell, AP, Cardiorespiratory performance and blood chemistry during swimming and recovery in three populations of elite swimmers: adult sockeye salmon, Comparative Biochemistry and Physiology. Part A, 166, (2) pp. 385-397. ISSN 1095-6433 (2013) [Refereed Article]

DOI: doi:10.1016/j.cbpa.2013.07.020

Abstract

Every year, millions of adult sockeye salmon (Oncorhynchus nerka) perform an arduous, once-in-a-lifetime migration up the Fraser River (BC, Canada) to return to their natal stream to spawn. The changes in heart rate, stroke volume, and arterio-venous oxygen extraction (i.e., factors determining rates of oxygen delivery to the tissues by the cardiovascular system) have never been directly and simultaneously measured along with whole animal oxygen uptake in a maximally swimming fish. Here, such measurements were made using three sockeye salmon populations (Early Stuart, Chilko and Quesnel), which each performed two consecutive critical swimming speed (Ucrit) challenges to provide a comprehensive quantification of cardiovascular physiology, oxygen status and blood chemistry associated with swimming and recovery. Swim performance, oxygen uptake, cardiac output, heart rate and stroke volume did not significantly vary at rest, during swimming or during recovery between populations or sexes. Despite incomplete metabolic recovery between swim challenges, all fish repeated their swim performance and similar quantitative changes in the cardiorespiratory variables were observed for each swim challenge. The high maximum cardiorespiratory performance and excellent repeat swim performance are clearly beneficial in allowing the salmon to maintain steady ground speeds and reach the distant spawning grounds in a timely manner.

Item Details

Item Type:Refereed Article
Keywords:aerobic scope, blood gases, cardiac output, heart rate, lactate, migration, oxygen consumption, plasma ions
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal Behaviour
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Coastal and Estuarine Flora, Fauna and Biodiversity
UTAS Author:Clark, TD (Dr Timothy Clark)
ID Code:103353
Year Published:2013
Web of Science® Times Cited:22
Deposited By:IMAS Research and Education Centre
Deposited On:2015-10-06
Last Modified:2017-10-31
Downloads:0

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