Biochemical indicators of condition, nutrition and nitrogen excretion in caribou
Urinary urea nitrogen to creatinine ratios, urinary Nt-methylhistidine to creatinine ratios, serum urea nitrogen concentrations (SUN mg/dl), and serum Nt-methylhistidine concentrations were compared with physical measures of body composition in adult female barren-ground caribou (Rangifer tarandus g...
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Septentrio Academic Publishing
1996
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ftdoajarticles:oai:doaj.org/article:51f906e2c1a14c188c213b09784b59eb 2023-05-15T15:53:26+02:00 Biochemical indicators of condition, nutrition and nitrogen excretion in caribou Ray Case 1996-01-01T00:00:00Z https://doi.org/10.7557/2.16.4.1243 https://doaj.org/article/51f906e2c1a14c188c213b09784b59eb EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/1243 https://doaj.org/toc/1890-6729 doi:10.7557/2.16.4.1243 1890-6729 https://doaj.org/article/51f906e2c1a14c188c213b09784b59eb Rangifer, Vol 16, Iss 4 (1996) Rangifer urea urine serum caribou Animal culture SF1-1100 article 1996 ftdoajarticles https://doi.org/10.7557/2.16.4.1243 2022-12-31T05:51:07Z Urinary urea nitrogen to creatinine ratios, urinary Nt-methylhistidine to creatinine ratios, serum urea nitrogen concentrations (SUN mg/dl), and serum Nt-methylhistidine concentrations were compared with physical measures of body composition in adult female barren-ground caribou (Rangifer tarandus groenlandicus) from the Bathurst and Southampton Island herds during late winter. Body weight and UUC were used to estimate urinary urea nitrogen (urea-N) excretion in free ranging caribou. Only mean UUC reflected differences in fat reserves between populations. None of the biochemical indicators were directly related to body composition. However, elevated UUC were only observed in caribou with depleted fat reserves as demonstrated by low kidney fat index (KFK40) and/or reduced femur marrow fat (FMF<80). UUC greater than 0.25 were indicative of undernourished animals with depleted fat reserves. SUN and UN -MHC showed no clear relationship with fat reserves. The mean estimated daily urea-N excretion for adult female caribou in late winter was extremely low (0.11+0.01SE g urea-N/day, n=76, range=0.011-0.510). The results of my study suggest that UUC can be used to detect nutritionally stressed caribou with depleted fat reserves on lichen winter ranges. Article in Journal/Newspaper caribou Rangifer Rangifer tarandus Southampton Island Directory of Open Access Journals: DOAJ Articles Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) Rangifer 16 4 201 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Rangifer urea urine serum caribou Animal culture SF1-1100 |
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Rangifer urea urine serum caribou Animal culture SF1-1100 Ray Case Biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
topic_facet |
Rangifer urea urine serum caribou Animal culture SF1-1100 |
description |
Urinary urea nitrogen to creatinine ratios, urinary Nt-methylhistidine to creatinine ratios, serum urea nitrogen concentrations (SUN mg/dl), and serum Nt-methylhistidine concentrations were compared with physical measures of body composition in adult female barren-ground caribou (Rangifer tarandus groenlandicus) from the Bathurst and Southampton Island herds during late winter. Body weight and UUC were used to estimate urinary urea nitrogen (urea-N) excretion in free ranging caribou. Only mean UUC reflected differences in fat reserves between populations. None of the biochemical indicators were directly related to body composition. However, elevated UUC were only observed in caribou with depleted fat reserves as demonstrated by low kidney fat index (KFK40) and/or reduced femur marrow fat (FMF<80). UUC greater than 0.25 were indicative of undernourished animals with depleted fat reserves. SUN and UN -MHC showed no clear relationship with fat reserves. The mean estimated daily urea-N excretion for adult female caribou in late winter was extremely low (0.11+0.01SE g urea-N/day, n=76, range=0.011-0.510). The results of my study suggest that UUC can be used to detect nutritionally stressed caribou with depleted fat reserves on lichen winter ranges. |
format |
Article in Journal/Newspaper |
author |
Ray Case |
author_facet |
Ray Case |
author_sort |
Ray Case |
title |
Biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
title_short |
Biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
title_full |
Biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
title_fullStr |
Biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
title_full_unstemmed |
Biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
title_sort |
biochemical indicators of condition, nutrition and nitrogen excretion in caribou |
publisher |
Septentrio Academic Publishing |
publishDate |
1996 |
url |
https://doi.org/10.7557/2.16.4.1243 https://doaj.org/article/51f906e2c1a14c188c213b09784b59eb |
long_lat |
ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Southampton Island |
geographic_facet |
Southampton Island |
genre |
caribou Rangifer Rangifer tarandus Southampton Island |
genre_facet |
caribou Rangifer Rangifer tarandus Southampton Island |
op_source |
Rangifer, Vol 16, Iss 4 (1996) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/1243 https://doaj.org/toc/1890-6729 doi:10.7557/2.16.4.1243 1890-6729 https://doaj.org/article/51f906e2c1a14c188c213b09784b59eb |
op_doi |
https://doi.org/10.7557/2.16.4.1243 |
container_title |
Rangifer |
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16 |
container_issue |
4 |
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201 |
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1766388549076123648 |