Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada
In spring 2019, we conducted a comprehensive abundance and distribution survey for Peary caribou (Rangifer tarandus pearyi) and muskox (Ovibos moschatus) on Axel Heiberg Island, Nunavut, Canada. Although much of Axel Heiberg Island is rugged and extensively glaciated, areas east of the Princess Marg...
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/71605 2023-05-15T14:18:48+02:00 Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada Mallory, Conor D. Fredlund, Matthew Campbell, Mitch W. 2020-12-27 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605/54594 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605/54595 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605 Copyright (c) 2020 ARCTIC http://creativecommons.org/licenses/by/4.0/ CC-BY ARCTIC; Vol. 73 No. 4 (2020): December: 405-550; 499-508 1923-1245 0004-0843 Peary caribou muskox density surface model Rangifer tarandus pearyi Ovibos moschatus Axel Heiberg Island caribou de Peary boeuf musqué modèle de densité surfacique île Axel Heiberg info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2020 ftunivcalgaryojs 2022-07-03T17:30:01Z In spring 2019, we conducted a comprehensive abundance and distribution survey for Peary caribou (Rangifer tarandus pearyi) and muskox (Ovibos moschatus) on Axel Heiberg Island, Nunavut, Canada. Although much of Axel Heiberg Island is rugged and extensively glaciated, areas east of the Princess Margaret mountain range have high productivity given the latitude and have supported relatively large numbers of Peary caribou and muskoxen. This region of the island has been previously identified as a potential High Arctic refugium. The last island-wide survey, in 2007, estimated 4237 muskoxen (95% confidence interval [CI] [3371:5325]) and 2291 Peary caribou (95% CI [1636:3208]); based on our 2019 results, it appears that muskox numbers have been stable on Axel Heiberg Island since then. Using distance sampling and density surface models, we estimated 3772 muskoxen (95% CI [3001:4742]) on Axel Heiberg Island during our 2019 survey. In contrast, Peary caribou, which is listed as an endangered species under the Canadian Species at Risk Act, appear to have declined dramatically from the 2007 estimate. During the 2019 survey, we observed only six Peary caribou and could not generate an island-wide estimate. Abrupt declines in numbers are characteristic of the species and are usually related to poor winter conditions such as dense snowpack or extreme weather events that result in widespread ground-fast icing. However, the limited monitoring information available at the northern extent of Peary caribou range presents major challenges to our understanding of the mechanisms leading to this near total absence of approximately 20% of range-wide Peary caribou numbers. Au printemps de 2019, nous avons réalisé un levé exhaustif de l’abondance et de la distribution du caribou de Peary (Rangifer tarandus pearyi) et du boeuf musqué (Ovibos moschatus) sur l’île Axel Heiberg, au Nunavut, Canada. Même si une grande partie de l’île Axel Heiberg est accidentée et considérablement englacée, des aires à l’est des monts Princess Margaret ... Article in Journal/Newspaper Arctic Arctic Axel Heiberg Island Île Axel Heiberg muskox Nunavut ovibos moschatus Rangifer tarandus University of Calgary Journal Hosting Arctic Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Canada Caribou Range ENVELOPE(-125.436,-125.436,59.750,59.750) Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Nunavut Peary ENVELOPE(-63.867,-63.867,-65.250,-65.250) ARCTIC 73 4 499 508 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Peary caribou muskox density surface model Rangifer tarandus pearyi Ovibos moschatus Axel Heiberg Island caribou de Peary boeuf musqué modèle de densité surfacique île Axel Heiberg |
spellingShingle |
Peary caribou muskox density surface model Rangifer tarandus pearyi Ovibos moschatus Axel Heiberg Island caribou de Peary boeuf musqué modèle de densité surfacique île Axel Heiberg Mallory, Conor D. Fredlund, Matthew Campbell, Mitch W. Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada |
topic_facet |
Peary caribou muskox density surface model Rangifer tarandus pearyi Ovibos moschatus Axel Heiberg Island caribou de Peary boeuf musqué modèle de densité surfacique île Axel Heiberg |
description |
In spring 2019, we conducted a comprehensive abundance and distribution survey for Peary caribou (Rangifer tarandus pearyi) and muskox (Ovibos moschatus) on Axel Heiberg Island, Nunavut, Canada. Although much of Axel Heiberg Island is rugged and extensively glaciated, areas east of the Princess Margaret mountain range have high productivity given the latitude and have supported relatively large numbers of Peary caribou and muskoxen. This region of the island has been previously identified as a potential High Arctic refugium. The last island-wide survey, in 2007, estimated 4237 muskoxen (95% confidence interval [CI] [3371:5325]) and 2291 Peary caribou (95% CI [1636:3208]); based on our 2019 results, it appears that muskox numbers have been stable on Axel Heiberg Island since then. Using distance sampling and density surface models, we estimated 3772 muskoxen (95% CI [3001:4742]) on Axel Heiberg Island during our 2019 survey. In contrast, Peary caribou, which is listed as an endangered species under the Canadian Species at Risk Act, appear to have declined dramatically from the 2007 estimate. During the 2019 survey, we observed only six Peary caribou and could not generate an island-wide estimate. Abrupt declines in numbers are characteristic of the species and are usually related to poor winter conditions such as dense snowpack or extreme weather events that result in widespread ground-fast icing. However, the limited monitoring information available at the northern extent of Peary caribou range presents major challenges to our understanding of the mechanisms leading to this near total absence of approximately 20% of range-wide Peary caribou numbers. Au printemps de 2019, nous avons réalisé un levé exhaustif de l’abondance et de la distribution du caribou de Peary (Rangifer tarandus pearyi) et du boeuf musqué (Ovibos moschatus) sur l’île Axel Heiberg, au Nunavut, Canada. Même si une grande partie de l’île Axel Heiberg est accidentée et considérablement englacée, des aires à l’est des monts Princess Margaret ... |
format |
Article in Journal/Newspaper |
author |
Mallory, Conor D. Fredlund, Matthew Campbell, Mitch W. |
author_facet |
Mallory, Conor D. Fredlund, Matthew Campbell, Mitch W. |
author_sort |
Mallory, Conor D. |
title |
Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada |
title_short |
Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada |
title_full |
Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada |
title_fullStr |
Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada |
title_full_unstemmed |
Apparent Collapse of the Peary Caribou (Rangifer tarandus pearyi) Population on Axel Heiberg Island, Nunavut, Canada |
title_sort |
apparent collapse of the peary caribou (rangifer tarandus pearyi) population on axel heiberg island, nunavut, canada |
publisher |
The Arctic Institute of North America |
publishDate |
2020 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605 |
long_lat |
ENVELOPE(-91.001,-91.001,79.752,79.752) ENVELOPE(-125.436,-125.436,59.750,59.750) ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-63.867,-63.867,-65.250,-65.250) |
geographic |
Arctic Axel Heiberg Island Canada Caribou Range Heiberg Nunavut Peary |
geographic_facet |
Arctic Axel Heiberg Island Canada Caribou Range Heiberg Nunavut Peary |
genre |
Arctic Arctic Axel Heiberg Island Île Axel Heiberg muskox Nunavut ovibos moschatus Rangifer tarandus |
genre_facet |
Arctic Arctic Axel Heiberg Island Île Axel Heiberg muskox Nunavut ovibos moschatus Rangifer tarandus |
op_source |
ARCTIC; Vol. 73 No. 4 (2020): December: 405-550; 499-508 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605/54594 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605/54595 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/71605 |
op_rights |
Copyright (c) 2020 ARCTIC http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
container_title |
ARCTIC |
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73 |
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499 |
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