In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou
Rumen fluids of barren-ground caribou (Rangifer tarandus groenlandicus) were used with standard in vitro procedures in March 1981 to investigate the relative digestibilities of forages collected on caribou winter ranges in the southern Northwest Territories. In vitro dry matter disappearance (IVDMD)...
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The Arctic Institute of North America
1984
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65212 2023-05-15T14:19:15+02:00 In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou Thomas, Donald C. Kroeger, Peter Hervieux, David 1984-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65212 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65212/49126 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65212 ARCTIC; Vol. 37 No. 1 (1984): March: 1–90; 31-36 1923-1245 0004-0843 Animal food Caribou Ledum Lichens Mosses Sedges Shrubs Trees N.W.T Nunavut info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1984 ftunivcalgaryojs 2022-03-22T21:22:19Z Rumen fluids of barren-ground caribou (Rangifer tarandus groenlandicus) were used with standard in vitro procedures in March 1981 to investigate the relative digestibilities of forages collected on caribou winter ranges in the southern Northwest Territories. In vitro dry matter disappearance (IVDMD) of the three most abundant arboreal lichens, when fermented in test tubes for 60 h, averaged 67% compared with 43% for the seven most common terricolous lichens. The DMD of leaves of the most common shrubs, Vaccinium vitis-idaea, Empetrum nigrum, Arctostaphylos spp., and Ledum spp. averaged 46% (37-51%). Eight bryophyte species averaged 17% (7-28%) DMD. The DMD of species of three lichen genera with low protein contents, Cladina, Cladonia, and Cetraria, continued to increase with increasing fermentation periods up to 180 h. Nine species of lichens averaged 49% DMD when fermented for 60 h in test tubes, 64% when fermented in Erlenmeyer flasks, and 76% when 60 mg of urea was added to flasks. DMDs of 22 plant species were significantly higher in March 1981 than in similar tests conducted one year earlier. This annual variation in the digestive capacities of ruminal fluids was associated with the physical condition of the caribou and may have been related to their nutritional history.Key words: Canada, caribou, digestibilities, in vitro, lichens, nutrition, Rangifer Mots clés: Canada, caribou, digestibilité, in vitro, lichens, nutrition, Rangifer Article in Journal/Newspaper Arctic caribou Empetrum nigrum Northwest Territories Nunavut Rangifer tarandus University of Calgary Journal Hosting Canada Northwest Territories Nunavut ARCTIC 37 1 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Animal food Caribou Ledum Lichens Mosses Sedges Shrubs Trees N.W.T Nunavut |
spellingShingle |
Animal food Caribou Ledum Lichens Mosses Sedges Shrubs Trees N.W.T Nunavut Thomas, Donald C. Kroeger, Peter Hervieux, David In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou |
topic_facet |
Animal food Caribou Ledum Lichens Mosses Sedges Shrubs Trees N.W.T Nunavut |
description |
Rumen fluids of barren-ground caribou (Rangifer tarandus groenlandicus) were used with standard in vitro procedures in March 1981 to investigate the relative digestibilities of forages collected on caribou winter ranges in the southern Northwest Territories. In vitro dry matter disappearance (IVDMD) of the three most abundant arboreal lichens, when fermented in test tubes for 60 h, averaged 67% compared with 43% for the seven most common terricolous lichens. The DMD of leaves of the most common shrubs, Vaccinium vitis-idaea, Empetrum nigrum, Arctostaphylos spp., and Ledum spp. averaged 46% (37-51%). Eight bryophyte species averaged 17% (7-28%) DMD. The DMD of species of three lichen genera with low protein contents, Cladina, Cladonia, and Cetraria, continued to increase with increasing fermentation periods up to 180 h. Nine species of lichens averaged 49% DMD when fermented for 60 h in test tubes, 64% when fermented in Erlenmeyer flasks, and 76% when 60 mg of urea was added to flasks. DMDs of 22 plant species were significantly higher in March 1981 than in similar tests conducted one year earlier. This annual variation in the digestive capacities of ruminal fluids was associated with the physical condition of the caribou and may have been related to their nutritional history.Key words: Canada, caribou, digestibilities, in vitro, lichens, nutrition, Rangifer Mots clés: Canada, caribou, digestibilité, in vitro, lichens, nutrition, Rangifer |
format |
Article in Journal/Newspaper |
author |
Thomas, Donald C. Kroeger, Peter Hervieux, David |
author_facet |
Thomas, Donald C. Kroeger, Peter Hervieux, David |
author_sort |
Thomas, Donald C. |
title |
In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou |
title_short |
In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou |
title_full |
In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou |
title_fullStr |
In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou |
title_full_unstemmed |
In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou |
title_sort |
in vitro digestibilities of plants utilized by barren-ground caribou |
publisher |
The Arctic Institute of North America |
publishDate |
1984 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65212 |
geographic |
Canada Northwest Territories Nunavut |
geographic_facet |
Canada Northwest Territories Nunavut |
genre |
Arctic caribou Empetrum nigrum Northwest Territories Nunavut Rangifer tarandus |
genre_facet |
Arctic caribou Empetrum nigrum Northwest Territories Nunavut Rangifer tarandus |
op_source |
ARCTIC; Vol. 37 No. 1 (1984): March: 1–90; 31-36 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65212/49126 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65212 |
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ARCTIC |
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37 |
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1 |
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1766290882196144128 |