The genetic rescue of two bottlenecked South Island robin populations using translocations of inbred donors

Heber, Sol; Varsani, Arvind; Kuhn, Sylvia; Girg, Alexander; Kempenaers, Bart; Briskie, James V.

doi:10.1098/rspb.2012.2228

Cited by 86 publications

(95 citation statements)

References 69 publications

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“…But because recipients and immigrants came from population sources that have been long isolated from one another, and genetic drift is random, introgression between two inbred sources can still result in genetic rescue (Heber et al, 2013). But because recipients and immigrants came from population sources that have been long isolated from one another, and genetic drift is random, introgression between two inbred sources can still result in genetic rescue (Heber et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Testing the demographic effects of divergent immigrants on small populations of Trinidadian guppies

et al. 2016

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Augmenting small and isolated populations with immigrants from elsewhere is a potentially powerful, yet controversial management tool. The goal of this approach was to increase population sizes via demographic and/or genetic rescue, but augmentation can also have the unintended consequence of breaking down local adaptation and reducing population fitness through outbreeding depression. In theory, outbreeding depression is more likely the more divergent immigrants are from the recipient population. Managers should therefore choose immigrant populations that are as adaptively and genetically similar as possible. However, for species of conservation concern, divergent source populations are often the only option. A crucial question that remains in applied conservation is whether the positive effects of augmentation with divergent immigrants will outweigh the potential risks of outbreeding depression. Here, we evaluate the demographic effects of augmenting small, inbred laboratory populations of Trinidadian guppies with two different types of immigrants: (1) adaptively divergent but genetically similar or (2) adaptively similar but genetically divergent, and compare them against the demography of control populations with no immigration. After 1-2 generations, we found that adult abundance remained constant or slightly declined over the duration of the experiment in the control populations. In contrast, adult recruitment and total abundance increased in augmented populations. Furthermore, treatments that received immigrants from the adaptively similar but genetically divergent population attained overall larger population sizes than those that received immigrants from the adaptively divergent but genetically similar population. Although our experimental design could not parse out the effects of demographic and genetic rescue, our results do suggest that augmentation can be better than no action, even in situations where only divergent immigrant sources are available.

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Section: Discussionmentioning

confidence: 99%

Testing the demographic effects of divergent immigrants on small populations of Trinidadian guppies

et al. 2016

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“…; Heber et al . ). Most mammals display male‐biased dispersal; that is, males disperse farther and more frequently from the natal home range than females.…”

Section: Introductionmentioning

confidence: 97%

Y chromosome haplotype distribution of brown bears (Ursus arctos) in Northern Europe provides insight into population history and recovery

Schregel

Eiken

Grøndahl³

et al. 2015

Molecular Ecology

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High-resolution, male-inherited Y-chromosomal markers are a useful tool for population genetic analyses of wildlife species, but to date have only been applied in this context to relatively few species besides humans. Using nine Y-chromosomal STRs and three Y-chromosomal single nucleotide polymorphism markers (Y-SNPs), we studied whether male gene flow was important for the recent recovery of the brown bear (Ursus arctos) in Northern Europe, where the species declined dramatically in numbers and geographical distribution during the last centuries but is expanding now. We found 36 haplotypes in 443 male extant brown bears from Sweden, Norway, Finland and northwestern Russia. In 14 individuals from southern Norway from 1780 to 1920, we found two Y chromosome haplotypes present in the extant population as well as four Y chromosome haplotypes not present among the modern samples. Our results suggested major differences in genetic connectivity, diversity and structure between the eastern and the western populations in Northern Europe. In the west, our results indicated that the recovered population originated from only four male lineages, displaying pronounced spatial structuring suggestive of large-scale population size increase under limited male gene flow within the western subpopulation. In the east, we found a contrasting pattern, with high haplotype diversity and admixture. This first population genetic analysis of male brown bears shows conclusively that male gene flow was not the main force of population recovery.

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“…Hedrick [235] has shown that gene flow of up to 20% into a recipient population is not likely to swamp locally adapted alleles, particularly those under strong selection. Such genetic rescue/restoration has been successful in several recent cases, such as the Florida panthers, greater prairie chickens in North America, adders in Sweden, South Island robins in New Zealand and mountain pygmy possums in Australia [227,237,238]. However, as with translocations for genetic adaptation above, it is still contentious and has been underutilised as a tool in the conservation of endangered species.…”

Section: Last Ditch Efforts For Critical Speciesmentioning

confidence: 99%

“…Such findings could have important implications for genetic rescue efforts that consider breeding between genetically isolated populations and species, e.g. [226][227][228], but many more studies will be needed before generalisations will emerge. Do climate refugia outside species' current ranges exist and can species reach them?…”

Section: Potential For Naturally Occurring Hybridisation and Introgrementioning

confidence: 99%

A framework for incorporating evolutionary genomics into biodiversity conservation and management

Hoffmann

Griffin

Dillon

et al. 2015

Clim Chang Responses

178

186

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The genetic rescue of two bottlenecked South Island robin populations using translocations of inbred donors

Cited by 86 publications

References 69 publications

Testing the demographic effects of divergent immigrants on small populations of Trinidadian guppies

Testing the demographic effects of divergent immigrants on small populations of Trinidadian guppies

Y chromosome haplotype distribution of brown bears (Ursus arctos) in Northern Europe provides insight into population history and recovery

A framework for incorporating evolutionary genomics into biodiversity conservation and management

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