Individual energy dynamics reveal nonlinear interaction of stressors threatening migratory fish populations.

ABSTRACT: Migratory fish populations, like salmon, have dramatically declined for decades. Because of their extensive and energetically costly breeding migration, anadromous fish are sensitive to a variety of environmental stressors, in particular infrastructure building in freshwater streams that increases the energetic requirements of the breeding migration and food declines in the ocean.While the effects of these stressors separately are well documented, the cumulative and interactive impacts of them are poorly understood.Here, we use a bioenergetics model recently developed for fish life history to investigate the individual life history and population responses to these stressors combined.We find that food decline in the ocean can mitigate rather than exacerbate the negative effect of elevated

SUBMITTER: Chaparro-Pedraza PC 

PROVIDER: S-EPMC7986916 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature