Scientific publications

Genetic variability and the degree of divergence between grayling populations from the east of the distribution range (Barents and White Sea watersheds) were evaluated relying on the analysis of 37 allozyme loci. Genetic differences (DN=0.001–0.002) were found even between grayling stocks inhabiting different spawning tributaries within the same river systems. The greatest divergence from the rest was demonstrated by the populations from rivers Pechora and Indiga – the watercourses closest to the Ural drainage divide. The magnitude of the differences revealed (DN=0.035) and the distribution of the variation among specific allozyme loci are considered to assess the validity of distinguishing the grayling inhabiting the Ural region waters as an independent, longestablished genetic lineage. The likely sources for postglacial recolonization of northern Europe by grayling are discussed.