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dc.contributor.authorWallen, Johan
dc.contributor.authorNorén, Karin
dc.contributor.authorAngerbjörn, Anders
dc.contributor.authorEide, Nina Elisabeth
dc.contributor.authorLanda, Arild
dc.contributor.authorFlagstad, Øystein
dc.description.abstractTranslocations are a widespread approach to conserve threatened populations. Given the rapid decline and genetic deterioration of many natural populations, translocations are expected to become even more common in the future. The success of translocations is, however, dependent on multiple context-dependent factors, such as demographic and genetic status, habitat quality and animal behaviour. The Scandinavian arctic fox (Vulpes lagopus) exists in a small, fragmented population that is demographically vulnerable and exposed to inbreeding depression. In the early 2000 s, releases of arctic foxes from the Norwegian Captive Breeding Programme were initiated with the purpose of reintroducing populations to formerly inhabited areas and promoting connectivity. Since 2008/2009, 61 foxes have been released in Junkeren, Norway to re-establish an unoccupied area. We used a combination of field observations and microsatellite genotyping from the release site and two neighbouring subpopulations to investigate (i) the probability of establishment and reproduction for released foxes at the release site and in neighbouring subpopulations, and (ii) the impact on litter size and genetic composition in the recipient populations. Results showed that 18% of the released foxes were established at the release site, or in neighbouring subpopulations and 11.5% reproduced successfully. The extent of post-release dispersal into neighbouring subpopulations was also relatively high (11.5%). During the study period, the number of litters more than doubled in the subpopulations with released foxes contributing 29.5% to this increase, but no clear effect of immigration on litter size was found. There was a slight increase in genetic variation in one of the subpopulations, and a significant decline in genetic divergence between subpopulations. We conclude that despite extensive releases, demographic and genetic effects were highly context-dependent. This study highlights the challenges of reinforcement programmes in small populations and reintroductions to unoccupied sites, especially for highly mobile species in a fragmented landscape. conservation; immigration; translocation; genetic variation; demography; arctic fox; Vulpes lagopus; captive breeding; conservation breeding.en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.subjectgenetic variationen_US
dc.subjectarctic foxen_US
dc.subjectVulpes lagopusen_US
dc.subjectcaptive breedingen_US
dc.subjectconservation breedingen_US
dc.titleContext-dependent demographic and genetic effects of translocation from a captive breeding projecten_US
dc.title.alternativeContext-dependent demographic and genetic effects of translocation from a captive breeding projecten_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2022 The Authorsen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.journalAnimal Conservationen_US
dc.relation.projectEU/EU-Life projects SEFALO and SEFALO+en_US
dc.relation.projectAndre: Felles Fjellrev Nord II (20203530)en_US
dc.relation.projectAndre: EU/Interreg Sweden-Norway to Felles Fjellrev (304-4159-13)en_US
dc.relation.projectAndre: Göran Gustafssons stiftelse för natur och miljö i Lapplanden_US
dc.relation.projectAndre: Swedish Research Council FORMAS (#2015–1526)en_US
dc.relation.projectMiljødirektoratet: Norwegian Captive- Breeding Programme for Arctic Fox (190870en_US
dc.relation.projectMiljødirektoratet: Arctic Fox Monitoring Programme in Norway (18087019)en_US
dc.relation.projectAndre: Felles Fjellrev II (20200939)en_US
dc.relation.projectAndre: Felles Fjellrev Nord (20201086)en_US

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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