Banding survey at colonies of Brent Goose, &lt;i&gt;Branta bernicla&lt;/i&gt; in the Lena Delta, Russia and a recovery record

Sawa, Yusuke; Satô, Tatsuo; Ikeuchi, Toshio; Pozdnyakov, Vladimir

doi:10.14491/jbba.ms117

Cited by 1 publication

(2 citation statements)

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Section: Discussionmentioning

confidence: 99%

“…Outside of North America, the Lena River delta samples were grouped within nigricans where birds from the central and eastern portion of this delta are placed based on plumage (belly color) and migration routes east to the Pacific region (Sawa et al., 2019 , 2020 ). However, our sample of wintering brant at Terschelling Island, the Netherlands ( bernicla ) showed considerable admixture with microsatellite data and mtDNA haplotypes were placed within hrota haplotypes.…”

Section: Discussionmentioning

confidence: 99%

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Where east meets west: Phylogeography of the high Arctic North American brant goose

Wilson,

Boyd,

Sonsthagen

et al. 2024

Ecology and Evolution

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Genetic variation in Arctic species is often influenced by vicariance during the Pleistocene, as ice sheets fragmented the landscape and displaced populations to low‐ and high‐latitude refugia. The formation of secondary contact or suture zones during periods of ice sheet retraction has important consequences on genetic diversity by facilitating genetic connectivity between formerly isolated populations. Brant geese (Branta bernicla) are a maritime migratory waterfowl (Anseriformes) species that almost exclusively uses coastal habitats. Within North America, brant geese are characterized by two phenotypically distinct subspecies that utilize disjunct breeding and wintering areas in the northern Pacific and Atlantic. In the Western High Arctic of Canada, brant geese consist of individuals with an intermediate phenotype that are rarely observed nesting outside this region. We examined the genetic structure of brant geese populations from each subspecies and areas consisting of intermediate phenotypes using mitochondrial DNA (mtDNA) control region sequence data and microsatellite loci. We found a strong east–west partition in both marker types consistent with refugial populations. Within subspecies, structure was also observed at mtDNA while microsatellite data suggested the presence of only two distinct genetic clusters. The Western High Arctic (WHA) appears to be a secondary contact zone for both Atlantic and Pacific lineages as mtDNA and nuclear genotypes were assigned to both subspecies, and admixed individuals were observed in this region. The mtDNA sequence data outside WHA suggests no or very restricted intermixing between Atlantic and Pacific wintering populations which is consistent with published banding and telemetry data. Our study indicates that, although brant geese in the WHA are not a genetically distinct lineage, this region may act as a reservoir of genetic diversity and may be an area of high conservation value given the potential of low reproductive output in this species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%