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Differences in thermal tolerance among sockeye salmon populations


Eliason, EJ and Clark, TD and Hague, MJ and Hanson, LM and Gallagher, ZS and Jeffries, KM and Gale, MK and Patterson, DA and Hinch, SG and Farrell, AP, Differences in thermal tolerance among sockeye salmon populations, Science, 332, (6025) pp. 109-112. ISSN 0036-8075 (2011) [Refereed Article]

DOI: doi:10.1126/science.1199158


Climate change–induced increases in summer water temperature have been associated with elevated mortality of adult sockeye salmon (Oncorhynchus nerka) during river migration. We show that cardiorespiratory physiology varies at the population level among Fraser River sockeye salmon and relates to historical environmental conditions encountered while migrating. Fish from populations with more challenging migratory environments have greater aerobic scope, larger hearts, and better coronary supply. Furthermore, thermal optima for aerobic, cardiac, and heart rate scopes are consistent with the historic river temperature ranges for each population. This study suggests that physiological adaptation occurs at a very local scale, with population-specific thermal limits being set by physiological limitations in aerobic performance, possibly due to cardiac collapse at high temperatures.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal behaviour
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:Clark, TD (Dr Timothy Clark)
ID Code:103407
Year Published:2011
Web of Science® Times Cited:518
Deposited By:IMAS Research and Education Centre
Deposited On:2015-10-08
Last Modified:2017-11-01

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