Genetic diversity and structure of a recent fish invasion: Tench (Tinca tinca) in eastern North America.

ABSTRACT: Introduced and geographically expanding populations experience similar eco-evolutionary challenges, including founder events, genetic bottlenecks, and novel environments. Theory predicts that reduced genetic diversity resulting from such phenomena limits the success of introduced populations. Using 1900 SNPs obtained from restriction-site-associated DNA sequencing, we evaluated hypotheses related to the invasion history and connectivity of an invasive population of Tench (Tinca tinca), a Eurasian freshwater fish that has been expanding geographically in eastern North America for three decades. Consistent with the reported history of a single introduction event, our findings suggest that multiple introductions from distinct genetic sources are unlikely as Tench had a small effective

SUBMITTER: Bernos TA 

PROVIDER: S-EPMC9850014 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature