Thermal performance of fish is explained by an interplay between physiology, behaviour and ecology

Conservation Physiology
Philipp Neubauer, Ken H Andersen

Abstract

Increasing temperatures under climate change are thought to affect individual physiology of fish and other ectotherms through increases in metabolic demands, leading to changes in species performance with concomitant effects on species ecology. Although intuitively appealing, the driving mechanism behind thermal performance is contested; thermal performance (e.g. growth) appears correlated with metabolic scope (i.e. oxygen availability for activity) for a number of species, but a substantial number of datasets do not support oxygen limitation of long-term performance. Whether or not oxygen limitations via the metabolic scope, or a lack thereof, have major ecological consequences remains a highly contested question. size and trait-based model of energy and oxygen budgets to determine the relative influence of metabolic rates, oxygen limitation and environmental conditions on ectotherm performance. We show that oxygen limitation is not necessary to explain performance variation with temperature. Oxygen can drastically limit performance and fitness, especially at temperature extremes, but changes in thermal performance are primarily driven by the interplay between changing metabolic rates and species ecology. Furthermore, our mode...Continue Reading

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Citations

Sep 23, 2020·Biological Reviews of the Cambridge Philosophical Society·Wilco C E P VerberkHenk Siepel
Dec 2, 2020·Proceedings of the National Academy of Sciences of the United States of America·Juan G RubalcabaH Arthur Woods
Dec 1, 2020·Temperature : Multidisciplinary Biomedical Journal·Helene Volkoff, Ivar Rønnestad
Feb 26, 2021·The Journal of Experimental Biology·Sjannie LefevreDavid J McKenzie

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