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Inbreeding depression in a critically endangered carnivore
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen.ORCID-id: 0000-0002-9707-5206
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen.
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. Swedish Museum of Natural History, Sweden.ORCID-id: 0000-0001-8270-7613
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. National Veterinary Institute, Sweden.
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2016 (Engelska)Ingår i: Molecular Ecology, ISSN 0962-1083, E-ISSN 1365-294X, Vol. 25, nr 14, s. 3309-3318Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Harmful effects arising from matings between relatives (inbreeding) is a long-standing observation that is well founded in theory. Empirical evidence for inbreeding depression in natural populations is however rare because of the challenges of assembling pedigrees supplemented with fitness traits. We examined the occurrence of inbreeding and subsequent inbreeding depression using a unique data set containing a genetically verified pedigree with individual fitness traits for a critically endangered arctic fox (Vulpes lagopus) population. The study covered nine years and was comprised of 33 litters with a total of 205 individuals. We recorded that the present population was founded by only five individuals. Over the study period, the population exhibited a tenfold increase in average inbreeding coefficient with a final level corresponding to half-sib matings. Inbreeding mainly occurred between cousins, but we also observed two cases of full-sib matings. The pedigree data demonstrated clear evidence of inbreeding depression on traditional fitness traits where inbred individuals displayed reduced survival and reproduction. Fitness traits were however differently affected by the fluctuating resource abundande. Inbred individuals born at low-quality years displayed reduced first-year survival, while inbred individuals born at high-quality years were less likely to reproduce. The documentation of inbreeding depression in fundamental fitness traits suggests that inbreeding depression can limit population recovery. Introducing new genetic material to promote a genetic rescue effect may thus be necessary for population long-term persistence.

Ort, förlag, år, upplaga, sidor
2016. Vol. 25, nr 14, s. 3309-3318
Nyckelord [en]
conservation, extinction vortex, inbreeding coefficient, life history, microsatellites
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:su:diva-129381DOI: 10.1111/mec.13674ISI: 000379614400006OAI: oai:DiVA.org:su-129381DiVA, id: diva2:921993
Tillgänglig från: 2016-04-21 Skapad: 2016-04-21 Senast uppdaterad: 2020-03-04Bibliografiskt granskad

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Norén, KarinDalén, LoveMeijer, TomasAngerbjörn, Anders
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Zoologiska institutionen
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Molecular Ecology
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