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Maintenance of high levels of allelic variation in spite of a severe bottleneck in population size: the brown bear (Ursus arctos) in the Western Carpathians
Authors:Günther B. Hartl  Pavel Hell
Affiliation:(1) Forschungsinstitut für Wildtierkunde der Veterinärmedizinischen Universität Wien, Savoyenstraße 1, A-1160 Vienna, Austria;(2) Institute of Forestry Research, Ul. T. G. Masaryka 22, 96092, Zvolen, Slovakia
Abstract:Genetic variation in an isolated brown bear population of the Western Carpathians was studied by electrophoretic analysis of 51 presumptive allozyme loci. In spite of a severe population bottleneck at the beginning of the 1930s (40 survivors), average heterozygosity (H=5.3%) was within the range commonly found in mammals and the mean number of alleles per polymorphic locus (Ap=3, over five polymorphic loci) was very high. Possible reasons for the maintenance of high allelic variation are discussed.
Keywords:brown bear  Ursus arctos  Western Carpathians  bottleneck  electrophoresis  genetic variability
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