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

2020/10/28 by Sébastien Alfonso, Manuel Gesto, Bastien Sadoul · 602 citations
Agricultural and Biological Sciences · Environmental Science · #Biology #Climate change #Context (archaeology) #Ecology #Fish <Actinopterygii> #Fishery #Food Industry and Aquatic Biology #Global warming #Physiological and biochemical adaptations #Physiology #Zoology

paper · pdf · doi:10.1111/jfb.14599

published in Journal of Fish Biology 98(6), 1496-1508 (Wiley)

openalex publication_date 2020/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/03

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 that can alter the ability of fishes to cope with additional stressors, which might compromise their fitness. In addition, 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 the context of global warming.

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