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Large but uneven reduction in fish size across species in relation to changing sea temperatures [Global Change Biology]

Keywords : climate change, ectotherms, fish growth, fisheries, temperature–size rule

par Frédéric Magné - publié le , mis à jour le

Ectotherms often attain smaller body sizes when they develop at higher temperatures. This phenomenon, known as the temperature–size rule, has important consequences for global fisheries, whereby ocean warming is predicted to result in smaller fish and reduced biomass. However, the generality of this phenomenon and the mechanisms that drive it in natural populations remain unresolved. In this study, we document the maximal size of 74 fish species along a steep temperature gradient in the Mediterranean Sea and find strong support for the temperature–size rule.(...)

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