Energetic reserves of Hudson Bay willow ptarmigan during winter and spring
Willow ptarmigan (Lagopus lagopus) were collected from the Hudson Bay coast of Ontario from February to June, and the proximate composition and tissue composition of the carcasses were analysed. Total carcass composition remained uniform from February to late May. The neutral fat level remained low...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1982
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Online Access: | http://dx.doi.org/10.1139/z82-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-212 |
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crcansciencepubl:10.1139/z82-212 2023-12-17T10:31:23+01:00 Energetic reserves of Hudson Bay willow ptarmigan during winter and spring Thomas, Vernon G. 1982 http://dx.doi.org/10.1139/z82-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-212 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 60, issue 7, page 1618-1623 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1982 crcansciencepubl https://doi.org/10.1139/z82-212 2023-11-19T13:38:29Z Willow ptarmigan (Lagopus lagopus) were collected from the Hudson Bay coast of Ontario from February to June, and the proximate composition and tissue composition of the carcasses were analysed. Total carcass composition remained uniform from February to late May. The neutral fat level remained low at approximately 2% of body weight. The total energy reserve from neutral fat and labile protein was calculated to be 165 and 180 kcal (1 kcal = 4.1868 kJ), respectively, for a 550-g female and a 600-g male ptarmigan. Gonadal recrudescence began in early May, but its extent was not correlated significantly with change in body weight or carcass neutral fat content. The low neutral fat levels observed during winter and the onset of reproduction indicate that this population is dependent upon its immediate food supply for both winter survival and clutch formation. Article in Journal/Newspaper Hudson Bay Canadian Science Publishing (via Crossref) Hudson Bay Hudson Canadian Journal of Zoology 60 7 1618 1623 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Thomas, Vernon G. Energetic reserves of Hudson Bay willow ptarmigan during winter and spring |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Willow ptarmigan (Lagopus lagopus) were collected from the Hudson Bay coast of Ontario from February to June, and the proximate composition and tissue composition of the carcasses were analysed. Total carcass composition remained uniform from February to late May. The neutral fat level remained low at approximately 2% of body weight. The total energy reserve from neutral fat and labile protein was calculated to be 165 and 180 kcal (1 kcal = 4.1868 kJ), respectively, for a 550-g female and a 600-g male ptarmigan. Gonadal recrudescence began in early May, but its extent was not correlated significantly with change in body weight or carcass neutral fat content. The low neutral fat levels observed during winter and the onset of reproduction indicate that this population is dependent upon its immediate food supply for both winter survival and clutch formation. |
format |
Article in Journal/Newspaper |
author |
Thomas, Vernon G. |
author_facet |
Thomas, Vernon G. |
author_sort |
Thomas, Vernon G. |
title |
Energetic reserves of Hudson Bay willow ptarmigan during winter and spring |
title_short |
Energetic reserves of Hudson Bay willow ptarmigan during winter and spring |
title_full |
Energetic reserves of Hudson Bay willow ptarmigan during winter and spring |
title_fullStr |
Energetic reserves of Hudson Bay willow ptarmigan during winter and spring |
title_full_unstemmed |
Energetic reserves of Hudson Bay willow ptarmigan during winter and spring |
title_sort |
energetic reserves of hudson bay willow ptarmigan during winter and spring |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/z82-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-212 |
geographic |
Hudson Bay Hudson |
geographic_facet |
Hudson Bay Hudson |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
Canadian Journal of Zoology volume 60, issue 7, page 1618-1623 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z82-212 |
container_title |
Canadian Journal of Zoology |
container_volume |
60 |
container_issue |
7 |
container_start_page |
1618 |
op_container_end_page |
1623 |
_version_ |
1785584669050273792 |