Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance
The islands of the Canadian Arctic Archipelago lie immediately north of mainland North America in the Arctic Ocean. They are surrounded by ice for most of each year. Caribou (Rangifer tarandus) cross the sea ice in seasonal migrations among the islands and between the mainland and Arctic Islands. We...
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Septentrio Academic Publishing
2005
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Online Access: | https://septentrio.uit.no/index.php/rangifer/article/view/1773 https://doi.org/10.7557/2.25.4.1773 |
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/1773 2023-05-15T14:28:42+02:00 Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance Miller, Frank L. Barry, Samuel J. Calvert, Wndy A. 2005-05-01 application/pdf https://septentrio.uit.no/index.php/rangifer/article/view/1773 https://doi.org/10.7557/2.25.4.1773 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/1773/1653 https://septentrio.uit.no/index.php/rangifer/article/view/1773 doi:10.7557/2.25.4.1773 Copyright (c) 2015 Frank L. Miller, Samuel J. Barry, Wndy A. Calvert http://creativecommons.org/licenses/by/3.0/ CC-BY Rangifer; Vol 25 (2005): Special Issue No. 16; 77-88 1890-6729 caribou Arctic crossings of sea ice Canadian Arctic Islands inter-island and mainland-island seasonal migrations Rangifer tarandus info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2005 ftunitroemsoe https://doi.org/10.7557/2.25.4.1773 2021-08-16T15:07:20Z The islands of the Canadian Arctic Archipelago lie immediately north of mainland North America in the Arctic Ocean. They are surrounded by ice for most of each year. Caribou (Rangifer tarandus) cross the sea ice in seasonal migrations among the islands and between the mainland and Arctic Islands. We compiled observations of 1272 discrete caribou crossings on the sea ice of northeastern Franklin Strait, Bellot Strait, Peel Sound and Baring Channel in the south-central Canadian Arctic Archipelago during four May—June search periods from 1977 to 1980. We clustered the 850 caribou trails found on the sea ice of northeastern Franklin Strait and on outer Peel Sound as 73 sea-ice crossing sites. We investigated whether caribou at the origin of a sea-ice crossing site could see land on the opposite side at the potential terminus. We measured the straight-line distance from where the caribou first came onto the ice (origin) to the first possible landfall (potential terminus). Potential termini were geodetically visible to caribou from elevated terrain near 96% of the origins of the 73 sea-ice crossing sites and still visible at sea-level at the origins on 68%. Caribou are able to take advantage of seasonal use of all of the islands and the peninsula by making sea-ice crossings, thereby helping to increase the magnitudes and durations of population highs and reduce their lows. Knowledge of these alternative pat¬terns of use made possible by sea-ice crossings is necessary to fully understand the population dynamics of these caribou and the importance of possible future changes in ice cover. Article in Journal/Newspaper Arctic Archipelago Arctic Arctic Ocean Bellot Strait Canadian Arctic Archipelago Rangifer Rangifer tarandus Sea ice University of Tromsø: Septentrio Academic Publishing Arctic Arctic Ocean Baring Channel ENVELOPE(-98.835,-98.835,73.801,73.801) Bellot Strait ENVELOPE(-94.806,-94.806,71.994,71.994) Canadian Arctic Archipelago Franklin Strait ENVELOPE(-96.851,-96.851,71.501,71.501) Peel Sound ENVELOPE(-96.334,-96.334,73.001,73.001) Rangifer 25 4 77 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
caribou Arctic crossings of sea ice Canadian Arctic Islands inter-island and mainland-island seasonal migrations Rangifer tarandus |
spellingShingle |
caribou Arctic crossings of sea ice Canadian Arctic Islands inter-island and mainland-island seasonal migrations Rangifer tarandus Miller, Frank L. Barry, Samuel J. Calvert, Wndy A. Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance |
topic_facet |
caribou Arctic crossings of sea ice Canadian Arctic Islands inter-island and mainland-island seasonal migrations Rangifer tarandus |
description |
The islands of the Canadian Arctic Archipelago lie immediately north of mainland North America in the Arctic Ocean. They are surrounded by ice for most of each year. Caribou (Rangifer tarandus) cross the sea ice in seasonal migrations among the islands and between the mainland and Arctic Islands. We compiled observations of 1272 discrete caribou crossings on the sea ice of northeastern Franklin Strait, Bellot Strait, Peel Sound and Baring Channel in the south-central Canadian Arctic Archipelago during four May—June search periods from 1977 to 1980. We clustered the 850 caribou trails found on the sea ice of northeastern Franklin Strait and on outer Peel Sound as 73 sea-ice crossing sites. We investigated whether caribou at the origin of a sea-ice crossing site could see land on the opposite side at the potential terminus. We measured the straight-line distance from where the caribou first came onto the ice (origin) to the first possible landfall (potential terminus). Potential termini were geodetically visible to caribou from elevated terrain near 96% of the origins of the 73 sea-ice crossing sites and still visible at sea-level at the origins on 68%. Caribou are able to take advantage of seasonal use of all of the islands and the peninsula by making sea-ice crossings, thereby helping to increase the magnitudes and durations of population highs and reduce their lows. Knowledge of these alternative pat¬terns of use made possible by sea-ice crossings is necessary to fully understand the population dynamics of these caribou and the importance of possible future changes in ice cover. |
format |
Article in Journal/Newspaper |
author |
Miller, Frank L. Barry, Samuel J. Calvert, Wndy A. |
author_facet |
Miller, Frank L. Barry, Samuel J. Calvert, Wndy A. |
author_sort |
Miller, Frank L. |
title |
Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance |
title_short |
Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance |
title_full |
Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance |
title_fullStr |
Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance |
title_full_unstemmed |
Sea-ice crossings by caribou in the south-central Canadian Arctic Archipelago and their ecological importance |
title_sort |
sea-ice crossings by caribou in the south-central canadian arctic archipelago and their ecological importance |
publisher |
Septentrio Academic Publishing |
publishDate |
2005 |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/1773 https://doi.org/10.7557/2.25.4.1773 |
long_lat |
ENVELOPE(-98.835,-98.835,73.801,73.801) ENVELOPE(-94.806,-94.806,71.994,71.994) ENVELOPE(-96.851,-96.851,71.501,71.501) ENVELOPE(-96.334,-96.334,73.001,73.001) |
geographic |
Arctic Arctic Ocean Baring Channel Bellot Strait Canadian Arctic Archipelago Franklin Strait Peel Sound |
geographic_facet |
Arctic Arctic Ocean Baring Channel Bellot Strait Canadian Arctic Archipelago Franklin Strait Peel Sound |
genre |
Arctic Archipelago Arctic Arctic Ocean Bellot Strait Canadian Arctic Archipelago Rangifer Rangifer tarandus Sea ice |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Bellot Strait Canadian Arctic Archipelago Rangifer Rangifer tarandus Sea ice |
op_source |
Rangifer; Vol 25 (2005): Special Issue No. 16; 77-88 1890-6729 |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/1773/1653 https://septentrio.uit.no/index.php/rangifer/article/view/1773 doi:10.7557/2.25.4.1773 |
op_rights |
Copyright (c) 2015 Frank L. Miller, Samuel J. Barry, Wndy A. Calvert http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/2.25.4.1773 |
container_title |
Rangifer |
container_volume |
25 |
container_issue |
4 |
container_start_page |
77 |
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1766302861657899008 |