Upper thermal limits of the hearts of Arctic cod Boreogadus saida: adults compared with larvae |
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| Authors: | H. E. Drost J. Fisher F. Randall D. Kent E. C. Carmack A. P. Farrell |
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| Affiliation: | 1. Zoology Department, University of British Columbia, Vancouver, BC, Canada;2. Vancouver Aquarium, Vancouver, BC, Canada;3. , Vancouver, BC, V6R 4N9, Canada;4. Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC, Canada;5. Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, Canada |
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| Abstract: | Wild adult and reared larval Boreogadus saida were acclimated to 3·5° C before testing their cardiac response to acute warming. Heart rate transition temperatures during warming were similar for adult and larval hearts, except that the maximum temperature for heart rate was 3° C warmer for adults. Thus, in a rapidly warming Arctic Ocean, the upper temperature limit for larval rather than adult B. saida appears more likely to dictate the southern range of the species. |
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| Keywords: | climate change food web heart rate transition temperatures: TAB, TQB, Tmax, TAR |
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