Scott M Morrison, Theresa E Mackey, Travis Durhack, Jennifer D Jeffrey, Lilian M Wiens, Neil J Mochnacz, Caleb T Hasler, Eva C Enders, Jason R Treberg, Ken M Jeffries
Journal of fish biology 2020 AugThe upper thermal tolerance of brook trout Salvelinus fontinalis was estimated using critical thermal maxima (CTmax ) experiments on fish acclimated to temperatures that span the species' thermal range (5-25°C). The CTmax increased with acclimation temperature but plateaued in fish acclimated to 20, 23 and 25°C. Plasma lactate was highest, and the hepato-somatic index (IH ) was lowest at 23 and 25°C, which suggests additional metabolic costs at those acclimation temperatures. The results suggest that there is a sub-lethal threshold between 20 and 23°C, beyond which the fish experience reduced physiological performance. © 2020 The Fisheries Society of the British Isles.
Scott M Morrison, Theresa E Mackey, Travis Durhack, Jennifer D Jeffrey, Lilian M Wiens, Neil J Mochnacz, Caleb T Hasler, Eva C Enders, Jason R Treberg, Ken M Jeffries. Sub-lethal temperature thresholds indicate acclimation and physiological limits in brook trout Salvelinus fontinalis. Journal of fish biology. 2020 Aug;97(2):583-587
PMID: 32447755
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