Census of breeding seabirds in Vigur Island, Westfjords, Iceland in 2021
Recensement de l'avifaune de l'île de Vigur, Westfjords, Islande en 2021
Skráning fuglalífs á Vigur í vestfjörðum, Íslandi
Résumé
The Vigur Island bird census focused on the main bird species found on the island: Black Guillemots Cepphus grylle, Northern Fulmars Fulmarus glacialis, Great Cormorants Phalacrocorax carbo, gulls Larus sp., Eurasian Oystercatchers Haematopus ostralegus, and Arctic Terns Sterna paradisaea. The Arctic Tern population was estimated by counting nests, using a transect line method. Due to the hatching of the eggs, the survey had to be stopped and only 60% of the colony area was covered. The results show that in summer 2021, Vigur hosted 1092 ± 246 SD Black Guillemot individuals, 28 ± 8 SD oystercatchers, 19 ± 8 SD Cormorants, 120 ± 34 SD Fulmars, and 58 ± 20 SD European Herring Gulls Larus argentatus and Lesser Black-backed Gulls Larus fuscus. We counted 440 occupied Arctic Tern nests, leading to an estimation of 880 breeding adults.
Le recensement de l’avifaune de l’île de Vigur se focalise sur les principales espèces trouvées sur l’île : le Guillemot à miroir Cepphus grylle, le Fulmar boréal Fulmarus glacialis, le Grand Cormoran Phalacrocorax carbo, le Goéland Larus sp., l’Huîtrier pie Haematopus ostralegus, et la Sterne Arctique Sterna paradisaea. La population de Sternes Arctiques a été estimée par comptage des nids occupés, à l’aide de transects. En raison de l’éclosion des œufs, le comptage a dû être stoppé et seulement 60% de la colonie ont été couvert. Les résultats montrent que durant l’été 2021, l’île de Vigur a accueilli 1092 ± 246 (écart-type) Guillemots, 28 ± 8 Huîtriers, 19 ± 8 Cormorans, 120 ± 34 Fulmars, et 58 ± 20 goélands. Nous avons compté 440 nids occupé par des Sternes Arctiques, menant à une estimation de 880 adultes reproducteurs.
Talning fugla í Vigur leggur áherslu á megintegundir fugla á eyjunni: Teistur Cepphus grylle, Fýla Fulmarus glacialis, Dílaskarfa Phalacrocorax carbo, Máva Larus sp., Tjalda Haematopus ostralegus og Kríur Sterna paradisaea. Fjöldi kría var áætlað með sniðatalningu, en talningarsvæðið var skipt niður í ferkantaðar einingar og hreiður talin í hverri einingu með „transect line” aðferð. Að sökum útklekjun eggja varð rannsóknin stöðvuð, en hún náði aðeins yfir um 60% heildar fuglahjarðar svæðisins. Niðurstöður talningunnar sumars 2021 sýna að á Vigri var að finna 1092±246 teistur, 28±8 tjalda, 198 skarfa, 120±34 fýla og 58±20 máva. Við töldum 440 hreiður í virkri notkun, gefandi í skyn 880 fullorðna fugla.
Mots clés
vigur
birdlife
puffin
guillemot
fulmar
eider duck
tourism
wildlife
westfjords
Terns
Arctic
Ecology
marine ecology
Cormorants and Shags
oystercatchers
iceland
Fichier principal
Milesi-Gaches and Lhériau, 2022. Census of breeding seabirds in Vigur Island, Westfjords, Iceland in 2021. Bird Census News.pdf (865.67 Ko)
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