Comparative body composition strategies of breeding and nonbreeding female caribou
We evaluated the effects of season and reproductive status on body fat and body protein masses of free-ranging female barren-ground caribou (Rangifer tarandus granti). Body fat mass fluctuated markedly during the year (by a factor of at least 2) in both reproductive classes, but whereas maximum fatn...
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1999
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crcansciencepubl:10.1139/z99-169 2023-12-17T10:28:46+01:00 Comparative body composition strategies of breeding and nonbreeding female caribou Chan-McLeod, Ann C. Allaye White, Robert G Russell, Don E 1999 http://dx.doi.org/10.1139/z99-169 http://www.nrcresearchpress.com/doi/pdf/10.1139/z99-169 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 77, issue 12, page 1901-1907 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1999 crcansciencepubl https://doi.org/10.1139/z99-169 2023-11-19T13:38:29Z We evaluated the effects of season and reproductive status on body fat and body protein masses of free-ranging female barren-ground caribou (Rangifer tarandus granti). Body fat mass fluctuated markedly during the year (by a factor of at least 2) in both reproductive classes, but whereas maximum fatness occurred in autumn (September-November) in nonbreeding females, it did not occur until late winter (March-April) in breeding females. Seasonal changes in dry body protein mass were relatively modest, with annual maxima averaging only 31-43% higher than annual minima. Moreover, seasonal differences between the reproductive classes were not significant except in November-December. Absolute fat deposition by both breeding and nonbreeding females was highest in summer, though fat deposition increased relative to protein deposition in autumn. Between June and September, the primary deposition of body protein in breeding females contrasted with the primary deposition of body fat in nonbreeding females. As a result, breeding females were highly compromised in their fat deposition but not in their protein deposition, which approximated levels in nonlactating females. Differences in body composition between breeding and nonbreeding females were highest in autumn and lowest in early spring because of divergence in summer and convergence in winter. Article in Journal/Newspaper caribou Rangifer tarandus Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 77 12 1901 1907 |
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 Chan-McLeod, Ann C. Allaye White, Robert G Russell, Don E Comparative body composition strategies of breeding and nonbreeding female caribou |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
We evaluated the effects of season and reproductive status on body fat and body protein masses of free-ranging female barren-ground caribou (Rangifer tarandus granti). Body fat mass fluctuated markedly during the year (by a factor of at least 2) in both reproductive classes, but whereas maximum fatness occurred in autumn (September-November) in nonbreeding females, it did not occur until late winter (March-April) in breeding females. Seasonal changes in dry body protein mass were relatively modest, with annual maxima averaging only 31-43% higher than annual minima. Moreover, seasonal differences between the reproductive classes were not significant except in November-December. Absolute fat deposition by both breeding and nonbreeding females was highest in summer, though fat deposition increased relative to protein deposition in autumn. Between June and September, the primary deposition of body protein in breeding females contrasted with the primary deposition of body fat in nonbreeding females. As a result, breeding females were highly compromised in their fat deposition but not in their protein deposition, which approximated levels in nonlactating females. Differences in body composition between breeding and nonbreeding females were highest in autumn and lowest in early spring because of divergence in summer and convergence in winter. |
format |
Article in Journal/Newspaper |
author |
Chan-McLeod, Ann C. Allaye White, Robert G Russell, Don E |
author_facet |
Chan-McLeod, Ann C. Allaye White, Robert G Russell, Don E |
author_sort |
Chan-McLeod, Ann C. Allaye |
title |
Comparative body composition strategies of breeding and nonbreeding female caribou |
title_short |
Comparative body composition strategies of breeding and nonbreeding female caribou |
title_full |
Comparative body composition strategies of breeding and nonbreeding female caribou |
title_fullStr |
Comparative body composition strategies of breeding and nonbreeding female caribou |
title_full_unstemmed |
Comparative body composition strategies of breeding and nonbreeding female caribou |
title_sort |
comparative body composition strategies of breeding and nonbreeding female caribou |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/z99-169 http://www.nrcresearchpress.com/doi/pdf/10.1139/z99-169 |
genre |
caribou Rangifer tarandus |
genre_facet |
caribou Rangifer tarandus |
op_source |
Canadian Journal of Zoology volume 77, issue 12, page 1901-1907 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z99-169 |
container_title |
Canadian Journal of Zoology |
container_volume |
77 |
container_issue |
12 |
container_start_page |
1901 |
op_container_end_page |
1907 |
_version_ |
1785580950423339008 |