Factors limiting productivity of the Central Arctic Caribou Herd of Alaska
Many biotic and abiotic factors can limit productivity and growth of caribou (Rangifer tarandus) herds, but limiting factors typically vary by region. Identifying limiting factors may help to indicate which seasons are of relative importance to a caribou herd and possibly to suggest general life his...
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2004
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Online Access: | https://doi.org/10.7557/2.24.2.303 https://doaj.org/article/ef9cb5a9f60043f68e97cb86d235b21b |
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ftdoajarticles:oai:doaj.org/article:ef9cb5a9f60043f68e97cb86d235b21b 2023-05-15T14:56:16+02:00 Factors limiting productivity of the Central Arctic Caribou Herd of Alaska Shawn P. Haskell Warren B. Ballard 2004-04-01T00:00:00Z https://doi.org/10.7557/2.24.2.303 https://doaj.org/article/ef9cb5a9f60043f68e97cb86d235b21b EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/303 https://doaj.org/toc/1890-6729 doi:10.7557/2.24.2.303 1890-6729 https://doaj.org/article/ef9cb5a9f60043f68e97cb86d235b21b Rangifer, Vol 24, Iss 2 (2004) climate change foraging strategy insect harassment NAM Rangifer snow Animal culture SF1-1100 article 2004 ftdoajarticles https://doi.org/10.7557/2.24.2.303 2022-12-31T09:34:18Z Many biotic and abiotic factors can limit productivity and growth of caribou (Rangifer tarandus) herds, but limiting factors typically vary by region. Identifying limiting factors may help to indicate which seasons are of relative importance to a caribou herd and possibly to suggest general life history strategies. Using regression techniques, we found that despite previous suggestions, net productivity of Alaska’s Central Arctic Caribou Herd (CAH) did not respond to early summer forage biomass or summer insect severity from the previous year. Abiotic factors that did have apparent effects on CAH productivity included early fall snow deposition, winter snow condition, and spring snow ablation. To achieve a suitable weight for conception, caribou of the CAH may exhibit a seasonal time-minimizing foraging strategy by moderating weight gain during the warm summer insect season and feeding more intensively during the insect-free weeks before the autumn rut. A long-term trend of the Northern Hemisphere annular mode (NAM) may be linked to anthropogenic climate change and may have negative implications for the future success of the CAH. Article in Journal/Newspaper Arctic caribou Climate change Rangifer Rangifer tarandus Alaska Directory of Open Access Journals: DOAJ Articles Arctic Rangifer 24 2 71 78 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
climate change foraging strategy insect harassment NAM Rangifer snow Animal culture SF1-1100 |
spellingShingle |
climate change foraging strategy insect harassment NAM Rangifer snow Animal culture SF1-1100 Shawn P. Haskell Warren B. Ballard Factors limiting productivity of the Central Arctic Caribou Herd of Alaska |
topic_facet |
climate change foraging strategy insect harassment NAM Rangifer snow Animal culture SF1-1100 |
description |
Many biotic and abiotic factors can limit productivity and growth of caribou (Rangifer tarandus) herds, but limiting factors typically vary by region. Identifying limiting factors may help to indicate which seasons are of relative importance to a caribou herd and possibly to suggest general life history strategies. Using regression techniques, we found that despite previous suggestions, net productivity of Alaska’s Central Arctic Caribou Herd (CAH) did not respond to early summer forage biomass or summer insect severity from the previous year. Abiotic factors that did have apparent effects on CAH productivity included early fall snow deposition, winter snow condition, and spring snow ablation. To achieve a suitable weight for conception, caribou of the CAH may exhibit a seasonal time-minimizing foraging strategy by moderating weight gain during the warm summer insect season and feeding more intensively during the insect-free weeks before the autumn rut. A long-term trend of the Northern Hemisphere annular mode (NAM) may be linked to anthropogenic climate change and may have negative implications for the future success of the CAH. |
format |
Article in Journal/Newspaper |
author |
Shawn P. Haskell Warren B. Ballard |
author_facet |
Shawn P. Haskell Warren B. Ballard |
author_sort |
Shawn P. Haskell |
title |
Factors limiting productivity of the Central Arctic Caribou Herd of Alaska |
title_short |
Factors limiting productivity of the Central Arctic Caribou Herd of Alaska |
title_full |
Factors limiting productivity of the Central Arctic Caribou Herd of Alaska |
title_fullStr |
Factors limiting productivity of the Central Arctic Caribou Herd of Alaska |
title_full_unstemmed |
Factors limiting productivity of the Central Arctic Caribou Herd of Alaska |
title_sort |
factors limiting productivity of the central arctic caribou herd of alaska |
publisher |
Septentrio Academic Publishing |
publishDate |
2004 |
url |
https://doi.org/10.7557/2.24.2.303 https://doaj.org/article/ef9cb5a9f60043f68e97cb86d235b21b |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic caribou Climate change Rangifer Rangifer tarandus Alaska |
genre_facet |
Arctic caribou Climate change Rangifer Rangifer tarandus Alaska |
op_source |
Rangifer, Vol 24, Iss 2 (2004) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/303 https://doaj.org/toc/1890-6729 doi:10.7557/2.24.2.303 1890-6729 https://doaj.org/article/ef9cb5a9f60043f68e97cb86d235b21b |
op_doi |
https://doi.org/10.7557/2.24.2.303 |
container_title |
Rangifer |
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24 |
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2 |
container_start_page |
71 |
op_container_end_page |
78 |
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1766328281193250816 |