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Related Experiment Videos

Population structure in a critically endangered arctic fox population: does genetics matter?

L Dalén1, K Kvaløy, J D C Linnell

  • 1Department of Zoology, Stockholm University, S-106 91 Stockholm, Sweden. love.dalen@zoologi.su.se

Molecular Ecology
|August 17, 2006
PubMed
Summary

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Critically endangered arctic foxes in Scandinavia are fragmented into four distinct populations. Despite high genetic variation within these groups, low dispersal poses a significant threat to their long-term survival.

Area of Science:

  • Conservation genetics
  • Population dynamics
  • Wildlife biology

Background:

  • The Scandinavian arctic fox (Alopex lagopus) is critically endangered due to severe population decline.
  • Historical high dispersal rates suggest limited prior population differentiation.
  • Recent population declines may have increased fragmentation and reduced gene flow.

Purpose of the Study:

  • To investigate the current population structure and genetic diversity of Scandinavian arctic foxes.
  • To assess the impact of recent population declines on dispersal and fragmentation.
  • To identify the primary threats to the persistence of arctic fox populations.

Main Methods:

  • Analysis of genetic variation using 10 microsatellite loci.
  • Sampling of 150 arctic foxes from Scandinavia and Russia.

Related Experiment Videos

  • Population genetic analyses including F(ST) calculations.

    • Main Results:

    • Arctic foxes in Scandinavia are currently subdivided into four distinct populations.
    • The Kola Peninsula and northwest Russia form a fifth, larger population.
    • Dispersal between Scandinavian populations is low, but genetic variation within populations remains high.
    • F(ST) values are consistent with recent fragmentation.

    Conclusions:

    • Recent fragmentation, rather than inbreeding depression, is the primary concern for Scandinavian arctic foxes.
    • Demographic stochasticity poses a higher threat than low genetic variation due to small, isolated populations.
    • Conservation efforts should focus on mitigating the effects of fragmentation and small population size.