Population genetics reveals divergent lineages and ongoing hybridization in a declining migratory fish species complex.

ABSTRACT: Deciphering the effects of historical and recent demographic processes responsible for the spatial patterns of genetic diversity and structure is a key objective in evolutionary and conservation biology. Using population genetic analyses, we investigated the demographic history, the contemporary genetic diversity and structure, and the occurrence of hybridization and introgression of two species of anadromous fish with contrasting life history strategies and which have undergone recent demographic declines, the allis shad (Alosa alosa) and the twaite shad (Alosa fallax). We genotyped 706 individuals from 20 rivers and 5 sites at sea in Southern Europe at thirteen microsatellite markers. Genetic structure between populations was lower for the nearly semelparous species A. alosa, which dispe

SUBMITTER: Rougemont Q 

PROVIDER: S-EPMC9338086 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature