Genetic rescue in a severely inbred wolf population

Research output: Contribution to journalArticle

Abstract

Natural populations are becoming increasingly fragmented which is expected to affect their viability due to inbreeding depression, reduced genetic diversity and increased sensitivity to demographic and environmental stochasticity. In small and highly inbred populations, the introduction of only a few immigrants may increase vital rates significantly. However, very few studies have quantified the long-term success of immigrants and inbred individuals in natural populations. Following an episode of natural immigration to the isolated, severely inbred Scandinavian wolf (Canis lupus) population, we demonstrate significantly higher pairing and breeding success for offspring to immigrants compared to offspring from native, inbred pairs. We argue that inbreeding depression is the underlying mechanism for the profound difference in breeding success. Highly inbred wolves may have lower survival during natal dispersal as well as competitive disadvantage to find a partner. Our study is one of the first to quantify and compare the reproductive success of first-generation offspring from migrants vs. native, inbred individuals in a natural population. Indeed, our data demonstrate the profound impact single immigrants can have in small, inbred populations, and represent one of very few documented cases of genetic rescue in a population of large carnivores.

Details

Authors
  • Mikael Åkesson
  • Olof Liberg
  • Håkan Sand
  • Petter Wabakken
  • Staffan Bensch
  • Øystein Flagstad
Organisations
External organisations
  • Swedish University of Agricultural Sciences
  • Hedmark University College
  • Norwegian Institute for Nature Research
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Genetics

Keywords

  • Canis lupus, genetic rescue, heterozygosity, immigration, inbreeding, inbreeding depression
Original languageEnglish
Pages (from-to)4745-4756
Number of pages12
JournalMolecular Ecology
Volume25
Issue number19
Publication statusPublished - 2016 Oct 1
Publication categoryResearch
Peer-reviewedYes