The Seasonal Food Regime of Arctic Beavers
Seasonal variation in food of the beaver (Caster canadensis Kuhl) was examined on the Mackenzie Delta, Northwest Territories, Canada. Leaves and, to a lesser extent, growing tips of willow (Salix spp.) were the main food items during July and August; during the remaining 10 months food consisted of...
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Online Access: | http://dx.doi.org/10.2307/1933662 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1933662 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1933662 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1933662 |
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crwiley:10.2307/1933662 2024-09-15T18:18:09+00:00 The Seasonal Food Regime of Arctic Beavers Aleksiuk, Michael 1970 http://dx.doi.org/10.2307/1933662 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1933662 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1933662 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1933662 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology volume 51, issue 2, page 264-270 ISSN 0012-9658 1939-9170 journal-article 1970 crwiley https://doi.org/10.2307/1933662 2024-08-13T04:18:00Z Seasonal variation in food of the beaver (Caster canadensis Kuhl) was examined on the Mackenzie Delta, Northwest Territories, Canada. Leaves and, to a lesser extent, growing tips of willow (Salix spp.) were the main food items during July and August; during the remaining 10 months food consisted of the bark of willow (76%), poplar (Populus balsamifera) (14%) and alder (Alnus crispa) (10%). Protein: calorie ratios in the diet were approximately 40 and 8 mg/cal during those two periods respectively. The northern beaver has adapted to low energy availability characteristic of winter by storing food in the autumn and again in the spring, and by intrinsically lowering food intake during the winter. It has adapted to seasonal variation in protein availability by utilizing high—protein willow leaves almost exclusively when they are available. The heavy dependence upon willow, and its resultant removal from the community, can impart a high degree of instability to northern beaver populations. Article in Journal/Newspaper Mackenzie Delta Northwest Territories Wiley Online Library Ecology 51 2 264 270 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Seasonal variation in food of the beaver (Caster canadensis Kuhl) was examined on the Mackenzie Delta, Northwest Territories, Canada. Leaves and, to a lesser extent, growing tips of willow (Salix spp.) were the main food items during July and August; during the remaining 10 months food consisted of the bark of willow (76%), poplar (Populus balsamifera) (14%) and alder (Alnus crispa) (10%). Protein: calorie ratios in the diet were approximately 40 and 8 mg/cal during those two periods respectively. The northern beaver has adapted to low energy availability characteristic of winter by storing food in the autumn and again in the spring, and by intrinsically lowering food intake during the winter. It has adapted to seasonal variation in protein availability by utilizing high—protein willow leaves almost exclusively when they are available. The heavy dependence upon willow, and its resultant removal from the community, can impart a high degree of instability to northern beaver populations. |
format |
Article in Journal/Newspaper |
author |
Aleksiuk, Michael |
spellingShingle |
Aleksiuk, Michael The Seasonal Food Regime of Arctic Beavers |
author_facet |
Aleksiuk, Michael |
author_sort |
Aleksiuk, Michael |
title |
The Seasonal Food Regime of Arctic Beavers |
title_short |
The Seasonal Food Regime of Arctic Beavers |
title_full |
The Seasonal Food Regime of Arctic Beavers |
title_fullStr |
The Seasonal Food Regime of Arctic Beavers |
title_full_unstemmed |
The Seasonal Food Regime of Arctic Beavers |
title_sort |
seasonal food regime of arctic beavers |
publisher |
Wiley |
publishDate |
1970 |
url |
http://dx.doi.org/10.2307/1933662 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1933662 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F1933662 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1933662 |
genre |
Mackenzie Delta Northwest Territories |
genre_facet |
Mackenzie Delta Northwest Territories |
op_source |
Ecology volume 51, issue 2, page 264-270 ISSN 0012-9658 1939-9170 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/1933662 |
container_title |
Ecology |
container_volume |
51 |
container_issue |
2 |
container_start_page |
264 |
op_container_end_page |
270 |
_version_ |
1810456278457122816 |