Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements
Thirty-eight black bears (Ursus americanus) and 43 polar bears (Ursus maritimus) were dissected to determine equations for predicting body weight (BW) and nonfat body weight (NFBW). Nutritional condition was estimated by calculating a fat to nonfat (FNF) ratio, equalling (BW – NFBW)/NFBW. For each s...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1990
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Online Access: | http://dx.doi.org/10.1139/z90-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/z90-006 |
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crcansciencepubl:10.1139/z90-006 2023-12-17T10:51:21+01:00 Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements Cattet, Marc 1990 http://dx.doi.org/10.1139/z90-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/z90-006 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 68, issue 1, page 32-39 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1990 crcansciencepubl https://doi.org/10.1139/z90-006 2023-11-19T13:38:22Z Thirty-eight black bears (Ursus americanus) and 43 polar bears (Ursus maritimus) were dissected to determine equations for predicting body weight (BW) and nonfat body weight (NFBW). Nutritional condition was estimated by calculating a fat to nonfat (FNF) ratio, equalling (BW – NFBW)/NFBW. For each species, BW and NFBW were accurately predicted by multiple regression equations based on morphological measurements. The FNF ratio was independent of body size and thus comparable between sexes and among age-classes. The accuracy of predicting the FNF ratio is limited, and reliable comparisons of nutritional condition among individual bears will require the development of more accurate techniques. Physiological measurements of marrow and intramuscular percent lipid content were also evaluated as potential indicators of nutritional condition, but were determined to be unreliable. Article in Journal/Newspaper Ursus maritimus Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 68 1 32 39 |
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 Cattet, Marc Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Thirty-eight black bears (Ursus americanus) and 43 polar bears (Ursus maritimus) were dissected to determine equations for predicting body weight (BW) and nonfat body weight (NFBW). Nutritional condition was estimated by calculating a fat to nonfat (FNF) ratio, equalling (BW – NFBW)/NFBW. For each species, BW and NFBW were accurately predicted by multiple regression equations based on morphological measurements. The FNF ratio was independent of body size and thus comparable between sexes and among age-classes. The accuracy of predicting the FNF ratio is limited, and reliable comparisons of nutritional condition among individual bears will require the development of more accurate techniques. Physiological measurements of marrow and intramuscular percent lipid content were also evaluated as potential indicators of nutritional condition, but were determined to be unreliable. |
format |
Article in Journal/Newspaper |
author |
Cattet, Marc |
author_facet |
Cattet, Marc |
author_sort |
Cattet, Marc |
title |
Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
title_short |
Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
title_full |
Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
title_fullStr |
Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
title_full_unstemmed |
Predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
title_sort |
predicting nutritional condition in black bears and polar bears on the basis of morphological and physiological measurements |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/z90-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/z90-006 |
genre |
Ursus maritimus |
genre_facet |
Ursus maritimus |
op_source |
Canadian Journal of Zoology volume 68, issue 1, page 32-39 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z90-006 |
container_title |
Canadian Journal of Zoology |
container_volume |
68 |
container_issue |
1 |
container_start_page |
32 |
op_container_end_page |
39 |
_version_ |
1785576586604445696 |