Demographic decline and detection of genetic bottleneck in a population of Barn Owl Tyto alba in Hungary

摘要: The effects of population bottlenecks, from both the and conservation genetics point view, have attracted great interest. Heterozygosity allelic diversity are basic components evolutionary potential populations. Many endangered species go through bottlenecks time to time. consequences important because in resulting small populations stochastic processes more pronounced and, by strengthening each other, they can lead extinction. Within framework global climate change question emerges how different species, primarily susceptible ones those depending on protection measures, react extremities. It is well known that a large proportion Barn Owl Tyto alba die following an unfavourable period. In study reported here we genotyped 24 microsatellite loci 58 unrelated individuals originating continuous three neighbouring Hungarian counties. We then performed Wilcoxon sign-rank test, L test Monte Carlo simulation loss alleles heterozygosity. also attempted infer past dynamics using two likelihood-based Bayesian methods. Although 74% reduction this documented harsh winter 2002/2003 sampling resolution methods used standard considered be commonly satisfactory, none tests showed signs recent bottleneck. These results discussed terms imminent apparent drawbacks models used, roles absolute numbers survivors versus genotype percentages biological viewpoint.