Thermal dependence of cardiac function in arctic fish: implications of a warming world

Franklin, Craig E., Farrell, Anthony P., Altimiras, Jordi and Axelsson, Michael (2013) Thermal dependence of cardiac function in arctic fish: implications of a warming world. Journal of Experimental Biology, 216 22: 4251-4255. doi:10.1242/jeb.087130

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Author Franklin, Craig E.
Farrell, Anthony P.
Altimiras, Jordi
Axelsson, Michael
Title Thermal dependence of cardiac function in arctic fish: implications of a warming world
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
Publication date 2013-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1242/jeb.087130
Open Access Status File (Publisher version)
Volume 216
Issue 22
Start page 4251
End page 4255
Total pages 5
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists Ltd.
Language eng
Subject 1103 Clinical Sciences
1105 Dentistry
1312 Molecular Biology
1314 Physiology
1109 Neurosciences
1104 Complementary and Alternative Medicine
Abstract With the Arctic experiencing one of the greatest and most rapid increases in sea temperatures in modern time, predicting how Arctic marine organisms will respond to elevated temperatures has become crucial for conservation biology. Here, we examined the thermal sensitivity of cardiorespiratory performance for three closely related species of sculpins that inhabit the Arctic waters, two of which, Gymnocanthus tricuspis and Myoxocephalus scorpioides, have adapted to a restricted range within the Arctic, whereas the third species, Myoxocephalus scorpius, has a wider distribution. We tested the hypothesis that the fish restricted to Arctic cold waters would show reduced cardiorespiratory scope in response to an increase in temperature, as compared with the more eurythermal M. scorpius. As expected from their biogeography, M. scorpioides and G. tricuspis maximised cardiorespiratory performance at temperatures between 1 and 4°C, whereas M. scorpius maximised performance over a wider range of temperatures (1-10°C). Furthermore, factorial scope for cardiac output collapsed at elevated temperature for the two high-latitude species, negatively impacting their ability to support aerobically driven metabolic processes. Consequently, these results concurred with our hypothesis, suggesting that the sculpin species restricted to the Arctic are likely to be negatively impacted by increases in ocean temperatures.
Keyword Cardiovascular
Conservation physiology
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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