Genetic Variability of the European Perch in the Lake-River System of the Sebezhsky National Park

Based on 10 microsatellite loci of nuclear DNA, the analysis of the genetic variability of perch Perca fluviatilis (L., 1758) from four reservoirs of the Sebezhsky National Park, Sebezhsky district of the Pskov region, which are part of a single lake-river system, was carried out for the first time. The average estimates of the allelic diversity of microsatellite loci and the observed heterozygosity were A = 8.87 and H = 0.694 and did not significantly differ between the studied localities. The overall genetic differentiation of perch was θ = 0.002.95% CI (−0.0007; 0.005) and was non-significant. The population-genetic structure based on the studied multilocus genotypes has not been revealed by the Bayesian analysis method. The data obtained indicate a high level of gene flow in perch throughout the studied water area and make it possible to assume the presence of a genetically unified panmix population in the system of Sebezh lakes and rivers.