Data from: Strong decline of gene diversity in local populations of the highly endangered common hamster (Cricetus cricetus) in the western part of its european range.
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The Common hamster (Cricetus cricetus) has declined by more than 99% in the westernmost part of its range in Belgium, the Netherlands and the adjacent German federal state of North Rhine-Westphalia (BNN region) in the second half of the 20th century. To detect a decline in genetic variation as a result of inbreeding and genetic drift we have measured the genetic variation in current BNN hamster populations and compared the outcome with the genetic variation in museum samples from the historical, non-fragmented, population.Most of the current populations have lost the majority of their rare alleles and individual animals have become nearly homozygous. The total gene diversity of the remaining small populations combined is not much less than that of the historical population. Hence, the main genetic difference between historical and present is not in terms of total genetic variation or number of alleles in the BNN region, but in the distribution of this variation over the populations.SamplesThis study is based on 250 DNA samples from hamster populations in the BNN region (n=85) and reference populations in France (n=68) and a population in Central Germany (n=97).The samples from …
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