Unidirectional response to bidirectional selection on body size. I. Phenotypic, life-history, and endocrine responses.

ABSTRACT: Anthropogenic perturbations such as harvesting often select against a large body size and are predicted to induce rapid evolution toward smaller body sizes and earlier maturation. However, body-size evolvability and, hence, adaptability to anthropogenic perturbations remain seldom evaluated in wild populations. Here, we use a laboratory experiment over 6 generations to measure the ability of wild-caught medaka fish (Oryzias latipes) to evolve in response to bidirectional size-dependent selection mimicking opposite harvest regimes. Specifically, we imposed selection against a small body size (Large line), against a large body size (Small line) or random selection (Control line), and measured correlated responses across multiple phenotypic, life-history, and endocrine traits. As expec

SUBMITTER: Renneville C 

PROVIDER: S-EPMC7548191 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature