Chronic exposure to environmental temperature attenuates the thermal sensitivity of salmonids.

ABSTRACT: Metabolism, the biological processing of energy and materials, scales predictably with temperature and body size. Temperature effects on metabolism are normally studied via acute exposures, which overlooks the capacity for organisms to moderate their metabolism following chronic exposure to warming. Here, we conduct respirometry assays in situ and after transplanting salmonid fish among different streams to disentangle the effects of chronic and acute thermal exposure. We find a clear temperature dependence of metabolism for the transplants, but not the in-situ assays, indicating that chronic exposure to warming can attenuate salmonid thermal sensitivity. A bioenergetic model accurately captures the presence of fish in warmer streams when accounting for chronic exposure, whereas it incorre

SUBMITTER: Gonzalez-Ferreras AM 

PROVIDER: S-EPMC10721842 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature