Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada?
We examined the premise that changing abundance and environmental conditions influence the seasonal dispersion and distribution of migratory tundra caribou (Rangifer tarandus groenlandicus). The Ahiak herd’s (north-central Nunavut Territory, Canada) calving shifted from dispersed on islands to grega...
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/2544 2023-05-15T16:35:29+02:00 Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? Gunn, Anne Poole, Kim G. Wierzchowski, Jack Nishi, John S. Adamczewski, Jan Russell, Don D'Hont, Adrian 2013-06-01 application/pdf https://septentrio.uit.no/index.php/rangifer/article/view/2544 https://doi.org/10.7557/2.33.2.2544 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/2544/3305 https://septentrio.uit.no/index.php/rangifer/article/view/2544 doi:10.7557/2.33.2.2544 Copyright (c) 2015 Anne Gunn, Kim G. Poole, Jack Wierzchowski, John S. Nishi, Jan Adamczewski, Don Russell, Adrian D'Hont http://creativecommons.org/licenses/by/3.0/ CC-BY Rangifer; Vol 33 (2013): Special Issue No. 21; 35-58 1890-6729 Ahiak herd calving geography Rangifer tarandus groenlandicus rutting spatial fidelity sub-population tree-line info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftunitroemsoe https://doi.org/10.7557/2.33.2.2544 2021-08-16T15:12:39Z We examined the premise that changing abundance and environmental conditions influence the seasonal dispersion and distribution of migratory tundra caribou (Rangifer tarandus groenlandicus). The Ahiak herd’s (north-central Nunavut Territory, Canada) calving shifted from dispersed on islands to gregarious calving on the mainland coast. As abundance further increased, the calving ground elongated east and west such that we proposed a longitudinal climate gradient. As well, the calving ground’s east and west ends are different distances from the tree-line, which dips south closer to Hudson Bay. We proposed that whether caribou winter on the tundra or within boreal forest and the different climate across the long calving ground could contribute to differential survival and productivity such that sub-population structure would result. At the scale of the individual cows (identified through satellite-collars), we did not find inter-annual spatial fidelity to either the western or eastern parts of the calving ground. At the population scale (aerial surveys of calving distribution), we also did not find discontinuities in calving distribution. The spatial association of individual cows during calving compared with their association during the rut was inconsistent among years, but overall, cows that calve together, rut together. At this time and with the available evidence, we could not infer sub-population structure from shifts in dispersion and distribution as influenced by geography and changes in abundance for the Ahiak herd. Article in Journal/Newspaper Hudson Bay Nunavut Rangifer Rangifer tarandus Tundra University of Tromsø: Septentrio Academic Publishing Canada Hudson Hudson Bay Nunavut Rangifer 33 2 35 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
Ahiak herd calving geography Rangifer tarandus groenlandicus rutting spatial fidelity sub-population tree-line |
spellingShingle |
Ahiak herd calving geography Rangifer tarandus groenlandicus rutting spatial fidelity sub-population tree-line Gunn, Anne Poole, Kim G. Wierzchowski, Jack Nishi, John S. Adamczewski, Jan Russell, Don D'Hont, Adrian Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? |
topic_facet |
Ahiak herd calving geography Rangifer tarandus groenlandicus rutting spatial fidelity sub-population tree-line |
description |
We examined the premise that changing abundance and environmental conditions influence the seasonal dispersion and distribution of migratory tundra caribou (Rangifer tarandus groenlandicus). The Ahiak herd’s (north-central Nunavut Territory, Canada) calving shifted from dispersed on islands to gregarious calving on the mainland coast. As abundance further increased, the calving ground elongated east and west such that we proposed a longitudinal climate gradient. As well, the calving ground’s east and west ends are different distances from the tree-line, which dips south closer to Hudson Bay. We proposed that whether caribou winter on the tundra or within boreal forest and the different climate across the long calving ground could contribute to differential survival and productivity such that sub-population structure would result. At the scale of the individual cows (identified through satellite-collars), we did not find inter-annual spatial fidelity to either the western or eastern parts of the calving ground. At the population scale (aerial surveys of calving distribution), we also did not find discontinuities in calving distribution. The spatial association of individual cows during calving compared with their association during the rut was inconsistent among years, but overall, cows that calve together, rut together. At this time and with the available evidence, we could not infer sub-population structure from shifts in dispersion and distribution as influenced by geography and changes in abundance for the Ahiak herd. |
format |
Article in Journal/Newspaper |
author |
Gunn, Anne Poole, Kim G. Wierzchowski, Jack Nishi, John S. Adamczewski, Jan Russell, Don D'Hont, Adrian |
author_facet |
Gunn, Anne Poole, Kim G. Wierzchowski, Jack Nishi, John S. Adamczewski, Jan Russell, Don D'Hont, Adrian |
author_sort |
Gunn, Anne |
title |
Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? |
title_short |
Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? |
title_full |
Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? |
title_fullStr |
Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? |
title_full_unstemmed |
Have geographical influences and changing abundance led to sub-population structure in the Ahiak caribou herd, Nunavut, Canada? |
title_sort |
have geographical influences and changing abundance led to sub-population structure in the ahiak caribou herd, nunavut, canada? |
publisher |
Septentrio Academic Publishing |
publishDate |
2013 |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/2544 https://doi.org/10.7557/2.33.2.2544 |
geographic |
Canada Hudson Hudson Bay Nunavut |
geographic_facet |
Canada Hudson Hudson Bay Nunavut |
genre |
Hudson Bay Nunavut Rangifer Rangifer tarandus Tundra |
genre_facet |
Hudson Bay Nunavut Rangifer Rangifer tarandus Tundra |
op_source |
Rangifer; Vol 33 (2013): Special Issue No. 21; 35-58 1890-6729 |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/2544/3305 https://septentrio.uit.no/index.php/rangifer/article/view/2544 doi:10.7557/2.33.2.2544 |
op_rights |
Copyright (c) 2015 Anne Gunn, Kim G. Poole, Jack Wierzchowski, John S. Nishi, Jan Adamczewski, Don Russell, Adrian D'Hont http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/2.33.2.2544 |
container_title |
Rangifer |
container_volume |
33 |
container_issue |
2 |
container_start_page |
35 |
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1766025713482203136 |