Comparison of the Genetic Structure of Invasive Bigheaded Carp (Hypophthalmichthys spp.) Populations in Central-European Lacustrine and Riverine Habitats

Bigheaded carps (bighead carp, Hypophthalmichthys molitrix, and silver nobilis) their hybrids play an important ecological economic role in original habitat, while introduced stocks may pose serious risks. To address questions about the persistence invasiveness of these fish, we need to better understand population structures. The genetic structures bigheaded carp populations inhabiting Lake Balaton Tisza River were examined with ten microsatellite markers a mitochondrial DNA marker (COI). stock showed higher diversity compared stock. Based on hierarchical clustering, was characterized only by carps, included hybrid individuals. All COI haplotypes originated from Yangtze River. high genomic diversity, along significant deviation H–W equilibrium lack evidence bottleneck effect, it can be assumed that do not reproduce Balaton. present have repeated introductions escapes surrounding fishponds. consists solely This appears reproductive potential become invasive if environmental factors change due climate change.