Movements of Tundra Bean Goose Anser fabalis rossicus neck-banded in northern Scandinavia

Jong, Adriaan de; Heinicke, Thomas; Aarvak, Tomas; Øien, Ingar Jostein

doi:10.15845/on.v36i0.437

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…Tundra Bean Geese marked in spring in northern Sweden were mostly sighted in NE Scania (81% of 32 individuals; Figure 7, also cf. De Jong et al 2013). The remaining individuals of both forms were reported from sites north of Scania.…”

Section: Local Neckband Sightingsmentioning

confidence: 99%

Changes in local distribution and numbers of staging and wintering Bean Geese Anser fabalis in Scania, south Sweden 1977/1978–2016/2017

Nilsson

2017

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Scania in southern Sweden is an important staging and wintering province for the Bean Goose Anser fabalis, especially for the Taiga form A. f. fabalis. Based on counts in October, November and January 1977/1978–2016/2017, and observations of neck-banded individuals, the changes in local distribution are described. When the counts started, large numbers were counted already in October, but autumn numbers steadily decreased as the geese stayed further north in Sweden. The January counts on the other hand increased as the geese wintered in Scania in successively larger numbers rather than leaving Sweden. In January 2017, more than 40,000 or two-thirds of the global population of Taiga Bean Goose were counted in Scania. Within the province, more and more geese concentrated to inland areas and instead of using the Öresund coastal region as in earlier years. Birds from different breeding areas, e.g. from Finland and Sweden, used different parts of Scania. In recent years 3000–9000 of Tundra Bean Geese Anser f. rossicus have been wintering in a small area in northeast Scania.

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Section: Local Neckband Sightingsmentioning

confidence: 99%

Changes in local distribution and numbers of staging and wintering Bean Geese Anser fabalis in Scania, south Sweden 1977/1978–2016/2017

Nilsson

2017

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Determining the subspecies composition of bean goose harvests in Finland using genetic methods

et al. 2017

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Management of harvested species is of great importance in order to maintain a sustainable population. Genetics is, however, largely neglected in management plans. Here, we analysed the genetics of the bean goose (Anser fabalis) in order to aid conservation actions for the commonly hunted but declining subspecies, the taiga bean goose (A. f. fabalis). We used mitochondrial DNA (mtDNA) and microsatellites to determine the subspecies composition of the Finnish bean goose harvest, as the hunting bag is thought to comprise two subspecies, the taiga bean goose and the tundra bean goose (A. f. rossicus). The latter subspecies has a more stable or even increasing population size. Other eastern subspecies (A. f. serrirostris, A. f. middendorffii) could additionally be part of the Finnish hunting bag. We estimated genetic diversity, genetic structure and sex-biased gene flow of the different subspecies. Most of the harvested bean geese belonged to the taiga bean goose, whereas most of the tundra bean goose harvest was found to be geographically restricted to southeastern Finland. The mtDNA data supported strong genetic structure, while microsatellites showed much weaker structuring. This is probably due to the extreme female philopatry of the species. The taiga bean goose had lowered genetic diversity compared to other subspecies, warranting management actions. We also detected A. f. serrirostris mtDNA haplotypes and evidence of interspecific hybridization with two other Anser species.

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Environmental DNA reveals a presence of Anser fabalis (Bean Goose) and an absence of Anser erythropus (Lesser White-fronted Goose) in Finnish Northern Lapland

Honka,

Kvist,

Øien

et al. 2024

Ornithological Applications

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Detecting rare and elusive species from vast wilderness areas poses significant challenges. The Fennoscandian population of Anser erythropus (Lesser White-fronted Goose) is among the most endangered bird populations in Europe, with only 25–30 breeding pairs remaining in Northern Norway. Historically, its former breeding range extended across the mountainous regions of Fennoscandia. Thanks to targeted conservation efforts during the 21st century, A. erythropus has started to recolonize some of its former breeding areas in Norway and possibly also in Finland. Anser serrirostris rossicus (Tundra Bean Goose) is classified as Endangered (EN) in Finland, with just a few breeding pairs in northernmost Finnish Lapland with a poorly known breeding range. It breeds in higher numbers in Finnmark Norway and is listed as Vulnerable (VU) in Norway. Anser fabalis fabalis (Taiga Bean Goose), classified as Endangered in Norway, can also breed in the same area in low numbers. To locate individuals of these elusive goose species during breeding seasons, we used environmental DNA (eDNA) extracted from filtered lake water from selected lakes in northern Finland. We amplified and sequenced a short region of the mitochondrial control region to identify the species. Additionally, for positive controls, we sampled eDNA from the water of a Finnish spring staging site and known Norwegian breeding sites of the A. erythropus, from which eDNA of the A. erythropus was identified. eDNA of the A. erythropus was not detected within the former Finnish breeding range. Based on this, the A. erythropus has either not recolonized its former breeding habitats in Finland, the correct lakes were not sampled, the eDNA concentration was below detection limits, or due to other methodological issues. Anser serrirostris rossicus was detected in 3 lakes and A. fabalis fabalis in 10 lakes, providing new information about the breeding distribution of Bean Geese in Finnish Lapland.

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Movements of Tundra Bean Goose Anser fabalis rossicus neck-banded in northern Scandinavia

Cited by 4 publications

References 7 publications

Changes in local distribution and numbers of staging and wintering Bean Geese Anser fabalis in Scania, south Sweden 1977/1978–2016/2017

Changes in local distribution and numbers of staging and wintering Bean Geese Anser fabalis in Scania, south Sweden 1977/1978–2016/2017

Determining the subspecies composition of bean goose harvests in Finland using genetic methods

Environmental DNA reveals a presence of Anser fabalis (Bean Goose) and an absence of Anser erythropus (Lesser White-fronted Goose) in Finnish Northern Lapland

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