Show simple item record

dc.contributor.authorPoirier, M-A
dc.contributor.authorColtman, DW
dc.contributor.authorPelletier, F
dc.contributor.authorJorgenson, J
dc.contributor.authorFesta-Bianchet, M
dc.date.accessioned2020-12-10T00:23:25Z
dc.date.available2020-12-10T00:23:25Z
dc.date.issued2019-08-01
dc.identifierpii: EVA12706
dc.identifier.citationPoirier, M. -A., Coltman, D. W., Pelletier, F., Jorgenson, J. & Festa-Bianchet, M. (2019). Genetic decline, restoration and rescue of an isolated ungulate population. EVOLUTIONARY APPLICATIONS, 12 (7), pp.1318-1328. https://doi.org/10.1111/eva.12706.
dc.identifier.issn1752-4571
dc.identifier.urihttp://hdl.handle.net/11343/253475
dc.description.abstractIsolation of small populations is expected to reduce fitness through inbreeding and loss of genetic variation, impeding population growth and compromising population persistence. Species with long generation time are the least likely to be rescued by evolution alone. Management interventions that maintain or restore genetic variation to assure population viability are consequently of significant importance. We investigated, over 27 years, the genetic and demographic consequences of a demographic bottleneck followed by artificial supplementation in an isolated population of bighorn sheep (Ovis canadensis). Based on a long-term pedigree and individual monitoring, we documented the genetic decline, restoration and rescue of the population. Microsatellite analyses revealed that the demographic bottleneck reduced expected heterozygosity and allelic diversity by 6.2% and 11.3%, respectively, over two generations. Following supplementation, first-generation admixed lambs were 6.4% heavier at weaning and had 28.3% higher survival to 1 year compared to lambs of endemic ancestry. Expected heterozygosity and allelic diversity increased by 4.6% and 14.3% after two generations through new alleles contributed by translocated individuals. We found no evidence for outbreeding depression and did not see immediate evidence of swamping of local genes. Rapid intervention following the demographic bottleneck allowed the genetic restoration and rescue of this bighorn sheep population, likely preventing further losses at both the genetic and demographic levels. Our results provide further empirical evidence that translocation can be used to reduce inbreeding depression in nature and has the potential to mitigate the effect of human-driven environmental changes on wild populations.
dc.languageEnglish
dc.publisherWILEY
dc.titleGenetic decline, restoration and rescue of an isolated ungulate population
dc.typeJournal Article
dc.identifier.doi10.1111/eva.12706
melbourne.affiliation.departmentSchool of BioSciences
melbourne.source.titleEvolutionary Applications: evolutionary approaches to environmental, biomedical and socio-economic issues
melbourne.source.volume12
melbourne.source.issue7
melbourne.source.pages1318-1328
dc.rights.licenseCC BY
melbourne.elementsid1359189
melbourne.contributor.authorFesta-Bianchet, Marco
dc.identifier.eissn1752-4571
melbourne.accessrightsOpen Access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record