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Colonization history of the baltic harbor seals: Integrating archaeological, behavioral, and genetic data

Artikel i vetenskaplig tidskrift
Författare T. Härkönen
Karin C. Harding
S. J. Goodman
Kerstin Johannesson
Publicerad i Marine Mammal Science
Volym 21
Nummer/häfte 4
Sidor 695-716
ISSN 0824-0469
Publiceringsår 2005
Publicerad vid Institutionen för marin ekologi
Sidor 695-716
Språk en
Länkar dx.doi.org/10.1111/j.1748-7692.2005...
Ämnesord harbor seal, Phoca vitulina vitulina, bottleneck, effective population, size, genetic variation, hunting records, Littorina Sea, Mesolithic, Neolithic, PHOCA-VITULINA, MICROSATELLITE VARIATION, POPULATION-STRUCTURE, KATTEGAT-SKAGERRAK, HALICHOERUS-GRYPUS, BROWN BEARS, GREY SEALS, DIFFERENTIATION, AGE, CONSERVATION
Ämneskategorier Ekologi

Sammanfattning

Detailed knowledge about the history of colonization, population dynamics and behavior greatly enhance evaluation of genetic models of population units and migration rates in spatially structured populations. Here, the genetic uniqueness of harbor seals (Phoca vitulina) in the eastern Baltic is evaluated in the light of new information on the distribution and abundance of Baltic and eastern North Sea populations during the last 11,000 yr, recent hunting statistics, and population counts. Archaeological records reveal that the Baltic population of harbor seals was founded about 8,000 yr ago. Adjacent populations in the North Sea areas were either small, or went extinct, and became significant only during the last 300 yr. This information generates the hypothesis that the Baltic population has been isolated during the last 8,000 yr, despite the lack of geographical barriers. We show that stochastic effects, isolation, and a documented recent population bottleneck can account for the low observed genetic variation in Baltic harbor seals.

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