Effects of temperature acclimation on the upper thermal tolerance of two Arctic fishes.

ABSTRACT: The thermally dynamic nearshore Beaufort Sea, Alaska, is experiencing climate change-driven temperature increases. Measuring thermal tolerance of broad whitefish (Coregonus nasus) and saffron cod (Eleginus gracilis), both important species in the Arctic ecosystem, will enhance understanding of species-specific thermal tolerances. The objectives of this study were to determine the extent that acclimating broad whitefish and saffron cod to 5°C and 15°C changed their critical thermal maximum (CT_max) and HSP70 protein and mRNA expression in brain, muscle and liver tissues. After acclimation to 5°C and 15°C, the species were exposed to a thermal ramping rate of 3.4°C · h^-1 before quantifying the CT_max and HSP70 protein and transcript concentrations

SUBMITTER: Waterbury CR 

PROVIDER: S-EPMC10858409 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature