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COMMENTARY
The importance of incorporating natural thermal variation when evaluating physiological performance in wild species
Andrea J. Morash, Claire Neufeld, Tyson J. MacCormack, Suzanne Currie
Journal of Experimental Biology 2018 221: jeb164673 doi: 10.1242/jeb.164673 Published 23 July 2018
Andrea J. Morash
1Department of Biology, Mount Allison University, Sackville, NB, Canada, E4L 1G7
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  • For correspondence: amorash@mta.ca
Claire Neufeld
1Department of Biology, Mount Allison University, Sackville, NB, Canada, E4L 1G7
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Tyson J. MacCormack
2Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB, Canada, E4L 1G8
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Suzanne Currie
1Department of Biology, Mount Allison University, Sackville, NB, Canada, E4L 1G7
3Acadia University, Wolfville, NS, Canada, B4P 2R6
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ABSTRACT

Environmental variability in aquatic ecosystems makes the study of ectotherms complex and challenging. Physiologists have historically overcome this hurdle in the laboratory by using ‘average’ conditions, representative of the natural environment for any given animal. Temperature, in particular, has widespread impact on the physiology of animals, and it is becoming increasingly important to understand these effects as we face future climate challenges. The majority of research to date has focused on the expected global average increase in temperature; however, increases in climate variability are predicted to affect animals as much or more than climate warming. Physiological responses associated with the acclimation to a new stable temperature are distinct from those in thermally variable environments. Our goal is to highlight these physiological differences as they relate to both thermal acclimation and the ‘fallacy of the average’ or Jensen's inequality using theoretical models and novel empirical data. We encourage the use of more realistic thermal environments in experimental design to advance our understanding of these physiological responses such that we can better predict how aquatic animals will respond to future changes in our climate.

FOOTNOTES

  • Competing interests

    The authors declare no competing or financial interests.

  • Funding

    This work was supported by Natural Sciences and Engineering Research Council of Canada Discovery Grants RGPIN-2018-03884 to T.J.M. and RGPIN-061770 to S.C.; a New Brunswick Innovation Foundation grant to S.C. and T.J.M.; and New Brunswick Environmental Trust Fund grant 150081 to S.C. and T.J.M.

  • © 2018. Published by The Company of Biologists Ltd
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Keywords

  • Climate change
  • Environment
  • Growth
  • Metabolism
  • Aquatic
  • Ectotherm

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COMMENTARY
The importance of incorporating natural thermal variation when evaluating physiological performance in wild species
Andrea J. Morash, Claire Neufeld, Tyson J. MacCormack, Suzanne Currie
Journal of Experimental Biology 2018 221: jeb164673 doi: 10.1242/jeb.164673 Published 23 July 2018
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COMMENTARY
The importance of incorporating natural thermal variation when evaluating physiological performance in wild species
Andrea J. Morash, Claire Neufeld, Tyson J. MacCormack, Suzanne Currie
Journal of Experimental Biology 2018 221: jeb164673 doi: 10.1242/jeb.164673 Published 23 July 2018

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Article navigation

  • Top
  • Article
    • ABSTRACT
    • Introduction
    • Metabolism and temperature
    • Jensen's inequality and physiological performance
    • Empirical data
    • Future directions
    • Concluding remarks
    • Acknowledgements
    • FOOTNOTES
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