Natural and sexual selection drive multivariate phenotypic divergence along climatic gradients in an invasive fish.

ABSTRACT: Invasive species that rapidly spread throughout novel distribution ranges are prime models to investigate climate-driven phenotypic diversification on a contemporary scale. Previous studies on adaptive diversification along latitudinal gradients in fish have mainly considered body size and reported either increased or decreased body size towards higher latitudes (i.e. Bergmann's rule). Our study is the first to investigate phenotypic divergence in multiple traits, including sexually selected traits (size and shape of the male copulatory organ, the gonopodium) of invasive Gambusia affinis in China. We studied body size, life history traits and morphological variation across populations spanning 17 degrees of latitude and 16 degrees of longitude. Even though we found phenotypic variation alo

SUBMITTER: Ouyang X 

PROVIDER: S-EPMC6057953 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature