The Breeding Distribution and Current Population Status of the Ivory Gull in Canada

Aerial surveys were conducted in the eastern Canadian High Arctic from 1982 to 1985 to determine the distribution and size of breeding populations of the ivory gull (Pagophila eburnea). The known Canadian population is confined to Ellesmere, Devon, Seymour, Baffin and Perley islands. Two major conce...

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Published in:ARCTIC
Main Authors: Thomas, V.G., MacDonald, S.D.
Format: Article in Journal/Newspaper
Language:English
Published: The Arctic Institute of North America 1987
Subjects:
Online Access:https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823
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spelling ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64823 2023-05-15T14:19:14+02:00 The Breeding Distribution and Current Population Status of the Ivory Gull in Canada Thomas, V.G. MacDonald, S.D. 1987-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823/48737 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823 ARCTIC; Vol. 40 No. 3 (1987): September: 175–237; 211-218 1923-1245 0004-0843 Aerial surveys Animal distribution Animal population Ivory Gulls Nunataks Brodeur Peninsula Nunavut Devon Island Ellesmere Island info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1987 ftunivcalgaryojs 2022-03-22T21:21:59Z Aerial surveys were conducted in the eastern Canadian High Arctic from 1982 to 1985 to determine the distribution and size of breeding populations of the ivory gull (Pagophila eburnea). The known Canadian population is confined to Ellesmere, Devon, Seymour, Baffin and Perley islands. Two major concentrations of ivory gull colonies exist, one among the granitic nunataks of southeastern Ellesmere Island and the other on the sedimentary plateaus of the Brodeur Peninsula of Baffin Island. The size of breeding groups varies greatly from 4 to over 300 adult gulls. Breeding colonies are typified by their inland, remote and desolate locations and virtual absence of other animal species. We suggest that there is a single Canadian population of ivory gulls whose adult cohort contains over 2400 birds. The small number of leg band recoveries and retrapping of banded birds indicates that individuals can live at least 15 years. One-year-old ivory gulls were not seen at the colonies or on adjacent waters, and their location during summer remains unknown.Key words: ivory gull, Pagophila eburnea, arctic breeding populations, nunataks, polynyas On a effectué des relevés aériens dans la partie est de l'Extrême-Arctique canadien de 1982 à 1985 pour établir la distribution et la taille des populations de mouettes blanches (Pagophila eburnea) qui se reproduisent. La population canadienne que l'on connaît habite seulement les îles Ellesmere, Devon, Seymour, Baffin et Perley. Il y a deux endroits importants où se concentrent les colonies de mouettes blanches, l'une parmi les nunataks granitiques du sud-est de l'île Ellesmere, et l'autre sur les plateaux sédimentaires de la presqu'île Brodeur dans l'île Baffin. La taille des groupes qui se reproduisent varie grandement, allant de 4 à plus de 300 oiseaux adultes. Les colonies d'animaux qui se reproduisent sont caractérisées par leur aire de nidification isolée, loin à l'intérieur des terres, et par l'absence virtuelle d'autres espèces animales. Notre opinion est qu'il existe une seule population canadienne de mouettes blanches, dont l'ensemble des adultes compte plus de 2400 oiseaux. Le petit nombre de bagues récupérées et d'oiseaux bagués avoisinantes, et l'endroit où elles se tiennent reste inconnu.Mots clés: mouette blanche, Pagophila eburnea, populations qui se reproduisent dans l'Arctique, nunataks, polynies Article in Journal/Newspaper Arctic Arctic Arctique* Baffin Island Baffin Brodeur Peninsula Devon Island Ellesmere Island ivory gull Nunavut Pagophila eburnea University of Calgary Journal Hosting Arctic Baffin Island Blanche ENVELOPE(140.018,140.018,-66.663,-66.663) Brodeur Peninsula ENVELOPE(-88.000,-88.000,72.501,72.501) Canada Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) Ellesmere Island Nunavut Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) ARCTIC 40 3
institution Open Polar
collection University of Calgary Journal Hosting
op_collection_id ftunivcalgaryojs
language English
topic Aerial surveys
Animal distribution
Animal population
Ivory Gulls
Nunataks
Brodeur Peninsula
Nunavut
Devon Island
Ellesmere Island
spellingShingle Aerial surveys
Animal distribution
Animal population
Ivory Gulls
Nunataks
Brodeur Peninsula
Nunavut
Devon Island
Ellesmere Island
Thomas, V.G.
MacDonald, S.D.
The Breeding Distribution and Current Population Status of the Ivory Gull in Canada
topic_facet Aerial surveys
Animal distribution
Animal population
Ivory Gulls
Nunataks
Brodeur Peninsula
Nunavut
Devon Island
Ellesmere Island
description Aerial surveys were conducted in the eastern Canadian High Arctic from 1982 to 1985 to determine the distribution and size of breeding populations of the ivory gull (Pagophila eburnea). The known Canadian population is confined to Ellesmere, Devon, Seymour, Baffin and Perley islands. Two major concentrations of ivory gull colonies exist, one among the granitic nunataks of southeastern Ellesmere Island and the other on the sedimentary plateaus of the Brodeur Peninsula of Baffin Island. The size of breeding groups varies greatly from 4 to over 300 adult gulls. Breeding colonies are typified by their inland, remote and desolate locations and virtual absence of other animal species. We suggest that there is a single Canadian population of ivory gulls whose adult cohort contains over 2400 birds. The small number of leg band recoveries and retrapping of banded birds indicates that individuals can live at least 15 years. One-year-old ivory gulls were not seen at the colonies or on adjacent waters, and their location during summer remains unknown.Key words: ivory gull, Pagophila eburnea, arctic breeding populations, nunataks, polynyas On a effectué des relevés aériens dans la partie est de l'Extrême-Arctique canadien de 1982 à 1985 pour établir la distribution et la taille des populations de mouettes blanches (Pagophila eburnea) qui se reproduisent. La population canadienne que l'on connaît habite seulement les îles Ellesmere, Devon, Seymour, Baffin et Perley. Il y a deux endroits importants où se concentrent les colonies de mouettes blanches, l'une parmi les nunataks granitiques du sud-est de l'île Ellesmere, et l'autre sur les plateaux sédimentaires de la presqu'île Brodeur dans l'île Baffin. La taille des groupes qui se reproduisent varie grandement, allant de 4 à plus de 300 oiseaux adultes. Les colonies d'animaux qui se reproduisent sont caractérisées par leur aire de nidification isolée, loin à l'intérieur des terres, et par l'absence virtuelle d'autres espèces animales. Notre opinion est qu'il existe une seule population canadienne de mouettes blanches, dont l'ensemble des adultes compte plus de 2400 oiseaux. Le petit nombre de bagues récupérées et d'oiseaux bagués avoisinantes, et l'endroit où elles se tiennent reste inconnu.Mots clés: mouette blanche, Pagophila eburnea, populations qui se reproduisent dans l'Arctique, nunataks, polynies
format Article in Journal/Newspaper
author Thomas, V.G.
MacDonald, S.D.
author_facet Thomas, V.G.
MacDonald, S.D.
author_sort Thomas, V.G.
title The Breeding Distribution and Current Population Status of the Ivory Gull in Canada
title_short The Breeding Distribution and Current Population Status of the Ivory Gull in Canada
title_full The Breeding Distribution and Current Population Status of the Ivory Gull in Canada
title_fullStr The Breeding Distribution and Current Population Status of the Ivory Gull in Canada
title_full_unstemmed The Breeding Distribution and Current Population Status of the Ivory Gull in Canada
title_sort breeding distribution and current population status of the ivory gull in canada
publisher The Arctic Institute of North America
publishDate 1987
url https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823
long_lat ENVELOPE(140.018,140.018,-66.663,-66.663)
ENVELOPE(-88.000,-88.000,72.501,72.501)
ENVELOPE(-88.000,-88.000,75.252,75.252)
ENVELOPE(-56.767,-56.767,-64.283,-64.283)
geographic Arctic
Baffin Island
Blanche
Brodeur Peninsula
Canada
Devon Island
Ellesmere Island
Nunavut
Seymour
geographic_facet Arctic
Baffin Island
Blanche
Brodeur Peninsula
Canada
Devon Island
Ellesmere Island
Nunavut
Seymour
genre Arctic
Arctic
Arctique*
Baffin Island
Baffin
Brodeur Peninsula
Devon Island
Ellesmere Island
ivory gull
Nunavut
Pagophila eburnea
genre_facet Arctic
Arctic
Arctique*
Baffin Island
Baffin
Brodeur Peninsula
Devon Island
Ellesmere Island
ivory gull
Nunavut
Pagophila eburnea
op_source ARCTIC; Vol. 40 No. 3 (1987): September: 175–237; 211-218
1923-1245
0004-0843
op_relation https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823/48737
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64823
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