Temperature increase and its effects on fish stress physiology in the context of global warming

Type Article
Date 2021-06
Language English
Author(s) Alfonso Sebastien1, Gesto Manuel2, Sadoul Bastien3, 4
Affiliation(s) 1 : COISPA Tecnologia & Ricerca, stazione sperimentale per lo studio delle risorse del mare, 70126 Bari ,Italy
2 : Section for Aquaculture, DTU Aqua Technical University of Denmark, Willemoesvej 2, 9850 Hirtshals ,Denmark
3 : MARBEC, Ifremer, IRD, UM2, CNRS, 34200 Sète ,France
4 : ESE, Ecology and Ecosystem Health, Institut Agro, INRAE, 35042 Rennes Cedex ,France
Source Journal Of Fish Biology (0022-1112) (Wiley), 2021-06 , Vol. 98 , N. 6 , P. 1496-1508
DOI 10.1111/jfb.14599
WOS© Times Cited 15
Note Special Issue: Effects of Global Warming on Fishes and Fisheries
Keyword(s) adaptive capacity, coping, cortisol, heat, plasticity, teleost
Abstract

The capacity of fishes to cope with environmental variation is considered to be a main determinant of their fitness and is partly determined by their stress physiology. By 2100, global ocean temperature is expected to rise by 1–4°C, with potential consequences for stress physiology. Global warming is affecting animal populations worldwide, through chronic temperature increases and an increase in the frequency of extreme heatwave events. As ectotherms, fishes are expected to be particularly vulnerable to global warming. Although little information is available about the effects of global warming on stress physiology in nature, multiple studies describe the consequences of temperature increases on stress physiology in controlled laboratory conditions, providing insight into what can be expected in the wild. Chronic temperature increase constitutes a physiological load than can alter the ability of fishes to cope with additional stressors, which might compromise their fitness. Besides, rapid temperature increases are known to induce acute stress responses in fishes and might be of ecological relevance in particular situations. This review summarizes knowledge about effects of temperature increases on the stress physiology of fishes, and discusses these in a context of global warming.

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