Can variation in standard metabolic rate explain context-dependent performance of farmed Atlantic salmon offspring?

ABSTRACT: Escaped farmed Atlantic salmon interbreed with wild Atlantic salmon, leaving offspring that often have lower success in nature than pure wild salmon. On top of this, presence of farmed salmon descendants can impair production of wild-type recruits. We hypothesize that both these effects connect with farmed salmon having acquired higher standard metabolic rates (SMR, the energetic cost of self-maintenance) during domestication. Fitness-related advantages of phenotypic traits associated with both high SMR and farmed salmon (e.g., social dominance) depend on environmental conditions, such as food availability. We hypothesize that farmed offspring have an advantage at high food availability due to, for example, dominance behavior but suffer increased risks of starvation when food is scarce bec

SUBMITTER: Robertsen G 

PROVIDER: S-EPMC6342125 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature