Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution
The beaver (Castor canadensis Kuhl) is subjected to a seasonally fluctuating energy regime in the northern portion of its distribution. During the summer the animal has free access to an abundant food supply in the form of growing plant material, while the winter food supply is limited to a store of...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1969
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Online Access: | http://dx.doi.org/10.1139/z69-086 http://www.nrcresearchpress.com/doi/pdf/10.1139/z69-086 |
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crcansciencepubl:10.1139/z69-086 2023-12-17T10:33:15+01:00 Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution Aleksiuk, Michael Cowan, Ian McTaggart 1969 http://dx.doi.org/10.1139/z69-086 http://www.nrcresearchpress.com/doi/pdf/10.1139/z69-086 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 47, issue 4, page 471-481 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1969 crcansciencepubl https://doi.org/10.1139/z69-086 2023-11-19T13:38:48Z The beaver (Castor canadensis Kuhl) is subjected to a seasonally fluctuating energy regime in the northern portion of its distribution. During the summer the animal has free access to an abundant food supply in the form of growing plant material, while the winter food supply is limited to a store of cached saplings. The summer and winter periods are 4 and 8 months long respectively.In the Mackenzie Delta. Northwest Territories, growth was found to be rapid in the summer and absent in the winter, A winter weight loss characterized immature animals. Fat was deposited in the autumn, maintained during the winter, and mobilized in the spring. Animals were lean during the summer. Thyroid gland weights were high in the summer and low in the winter. It was concluded from these data that metabolic energy expenditure is high during the summer and low during the winter. This annual pattern is an inherent property of northern beavers. The adaptive significance of the pattern. is believed to be that energy expenditure is attuned to environmental energy availability. Article in Journal/Newspaper Mackenzie Delta Northwest Territories Canadian Science Publishing (via Crossref) Northwest Territories Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Canadian Journal of Zoology 47 4 471 481 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Aleksiuk, Michael Cowan, Ian McTaggart Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
The beaver (Castor canadensis Kuhl) is subjected to a seasonally fluctuating energy regime in the northern portion of its distribution. During the summer the animal has free access to an abundant food supply in the form of growing plant material, while the winter food supply is limited to a store of cached saplings. The summer and winter periods are 4 and 8 months long respectively.In the Mackenzie Delta. Northwest Territories, growth was found to be rapid in the summer and absent in the winter, A winter weight loss characterized immature animals. Fat was deposited in the autumn, maintained during the winter, and mobilized in the spring. Animals were lean during the summer. Thyroid gland weights were high in the summer and low in the winter. It was concluded from these data that metabolic energy expenditure is high during the summer and low during the winter. This annual pattern is an inherent property of northern beavers. The adaptive significance of the pattern. is believed to be that energy expenditure is attuned to environmental energy availability. |
format |
Article in Journal/Newspaper |
author |
Aleksiuk, Michael Cowan, Ian McTaggart |
author_facet |
Aleksiuk, Michael Cowan, Ian McTaggart |
author_sort |
Aleksiuk, Michael |
title |
Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution |
title_short |
Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution |
title_full |
Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution |
title_fullStr |
Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution |
title_full_unstemmed |
Aspects of seasonal energy expenditure in the beaver ( Castor canadensis Kuhl) at the northern limit of its distribution |
title_sort |
aspects of seasonal energy expenditure in the beaver ( castor canadensis kuhl) at the northern limit of its distribution |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/z69-086 http://www.nrcresearchpress.com/doi/pdf/10.1139/z69-086 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Northwest Territories Mackenzie Delta |
geographic_facet |
Northwest Territories Mackenzie Delta |
genre |
Mackenzie Delta Northwest Territories |
genre_facet |
Mackenzie Delta Northwest Territories |
op_source |
Canadian Journal of Zoology volume 47, issue 4, page 471-481 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z69-086 |
container_title |
Canadian Journal of Zoology |
container_volume |
47 |
container_issue |
4 |
container_start_page |
471 |
op_container_end_page |
481 |
_version_ |
1785587168526204928 |