Intraspecific variation among Chinook Salmon populations indicates physiological adaptation to local environmental conditions.

ABSTRACT: Understanding interpopulation variation is important to predicting species responses to climate change. Recent research has revealed interpopulation variation among several species of Pacific salmonids; however, the environmental drivers of population differences remain elusive. We tested for local adaptation and countergradient variation by assessing interpopulation variation among six populations of fall-run Chinook Salmon from the western United States. Juvenile fish were reared at three temperatures (11, 16 and 20°C), and five physiological metrics were measured (routine and maximum metabolic rate, aerobic scope, growth rate and critical thermal maximum). We then tested associations between these physiological metrics and 15 environmental characteristics (e.g. rearing temperature, lati

SUBMITTER: Zillig KW 

PROVIDER: S-EPMC10281501 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature