Physiological and genomic signatures of evolutionary thermal adaptation in redband trout from extreme climates.

ABSTRACT: Temperature is a master environmental factor that limits the geographical distribution of species, especially in ectotherms. To address challenges in biodiversity conservation under ongoing climate change, it is essential to characterize relevant functional limitations and adaptive genomic content at population and species levels. Here, we present evidence for adaptive divergence in cardiac function and genomic regions in redband trout (Oncorhynchus mykiss gairdneri) populations from desert and montane streams. Cardiac phenotypes of individual fish were measured in the field with a custom-built electrocardiogram apparatus. Maximum heart rate and its rate limiting temperature during acute warming were significantly higher in fish that have evolved in the extreme of a desert climate c

SUBMITTER: Chen Z 

PROVIDER: S-EPMC6183465 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature