Publication Date:
2011-04-02
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eliason, Erika J -- Clark, Timothy D -- Hague, Merran J -- Hanson, Linda M -- Gallagher, Zoe S -- Jeffries, Ken M -- Gale, Marika K -- Patterson, David A -- Hinch, Scott G -- Farrell, Anthony P -- New York, N.Y. -- Science. 2011 Apr 1;332(6025):109-12. doi: 10.1126/science.1199158.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada, V6T 1Z4. eliason@zoology.ubc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21454790" target="_blank"〉PubMed〈/a〉
Keywords:
*Adaptation, Physiological
;
Animal Migration
;
Animals
;
Climate Change
;
Heart/physiology
;
Population Dynamics
;
Salmon/*physiology
;
Species Specificity
;
*Temperature
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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