Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou
The comparative digestibilities of plants and their rates of digestion in vitro were assessed by fermentation with ruminal fluids obtained from barren-ground caribou (Rangifer tarandus groenlandicus) shot on their winter range in the southern Northwest Territories. There was a near-linear increase i...
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The Arctic Institute of North America
1981
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65588 2023-05-15T14:19:17+02:00 Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou Thomas, Donald C. Kroeger, Peter 1981-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65588 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65588/49502 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65588 ARCTIC; Vol. 34 No. 4 (1981): December: 281–388; 321-324 1923-1245 0004-0843 Animal food Animal physiology Biological sampling Birches Caribou Equisetum Intestines Leaves Lichens Liverworts Mosses Sedges Stems Willows Winter ecology Fort Smith region N.W.T info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1981 ftunivcalgaryojs 2022-03-22T21:22:40Z The comparative digestibilities of plants and their rates of digestion in vitro were assessed by fermentation with ruminal fluids obtained from barren-ground caribou (Rangifer tarandus groenlandicus) shot on their winter range in the southern Northwest Territories. There was a near-linear increase in the in vitro, dry-matter disappearance (IVDMD) with fermentation time (30-120 h) for all eight lichen species that we tested. In contrast, IVDMD was essentially maximal after 60 h fermentation for 10 of 11 non-lichen species. The green leaves of Carex rostrata and Equisetum variegatum were the only species with IVDMDs higher than 50% after a 60-63 h fermentation period. The two species of mosses and a liverwort were poorly digested (15-27%). The addition of 63 mg of urea to each tube markedly increased the digestibilities of both species of lichens tested, and that of Vaccinium vitis-idaea, but it lowered the IVDMD of Salix and Betula stems and the green and cured parts of Carex rostrata. The IVDMDs of four lichen species collected on the Canadian Arctic Islands were higher than those of eight terricolous species obtained from the mainland winter range of R. t. groenlandicus.Key words: Rangifer, caribou, in vitro, digestibility, forages, lichens, rates, Canada Article in Journal/Newspaper Arctic Arctic caribou Fort Smith Northwest Territories Rangifer tarandus University of Calgary Journal Hosting Arctic Canada Fort Smith ENVELOPE(-111.889,-111.889,60.004,60.004) Northwest Territories ARCTIC 34 4 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Animal food Animal physiology Biological sampling Birches Caribou Equisetum Intestines Leaves Lichens Liverworts Mosses Sedges Stems Willows Winter ecology Fort Smith region N.W.T |
spellingShingle |
Animal food Animal physiology Biological sampling Birches Caribou Equisetum Intestines Leaves Lichens Liverworts Mosses Sedges Stems Willows Winter ecology Fort Smith region N.W.T Thomas, Donald C. Kroeger, Peter Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou |
topic_facet |
Animal food Animal physiology Biological sampling Birches Caribou Equisetum Intestines Leaves Lichens Liverworts Mosses Sedges Stems Willows Winter ecology Fort Smith region N.W.T |
description |
The comparative digestibilities of plants and their rates of digestion in vitro were assessed by fermentation with ruminal fluids obtained from barren-ground caribou (Rangifer tarandus groenlandicus) shot on their winter range in the southern Northwest Territories. There was a near-linear increase in the in vitro, dry-matter disappearance (IVDMD) with fermentation time (30-120 h) for all eight lichen species that we tested. In contrast, IVDMD was essentially maximal after 60 h fermentation for 10 of 11 non-lichen species. The green leaves of Carex rostrata and Equisetum variegatum were the only species with IVDMDs higher than 50% after a 60-63 h fermentation period. The two species of mosses and a liverwort were poorly digested (15-27%). The addition of 63 mg of urea to each tube markedly increased the digestibilities of both species of lichens tested, and that of Vaccinium vitis-idaea, but it lowered the IVDMD of Salix and Betula stems and the green and cured parts of Carex rostrata. The IVDMDs of four lichen species collected on the Canadian Arctic Islands were higher than those of eight terricolous species obtained from the mainland winter range of R. t. groenlandicus.Key words: Rangifer, caribou, in vitro, digestibility, forages, lichens, rates, Canada |
format |
Article in Journal/Newspaper |
author |
Thomas, Donald C. Kroeger, Peter |
author_facet |
Thomas, Donald C. Kroeger, Peter |
author_sort |
Thomas, Donald C. |
title |
Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou |
title_short |
Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou |
title_full |
Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou |
title_fullStr |
Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou |
title_full_unstemmed |
Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou |
title_sort |
digestibility of plants in ruminal fluids of barren-ground caribou |
publisher |
The Arctic Institute of North America |
publishDate |
1981 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65588 |
long_lat |
ENVELOPE(-111.889,-111.889,60.004,60.004) |
geographic |
Arctic Canada Fort Smith Northwest Territories |
geographic_facet |
Arctic Canada Fort Smith Northwest Territories |
genre |
Arctic Arctic caribou Fort Smith Northwest Territories Rangifer tarandus |
genre_facet |
Arctic Arctic caribou Fort Smith Northwest Territories Rangifer tarandus |
op_source |
ARCTIC; Vol. 34 No. 4 (1981): December: 281–388; 321-324 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65588/49502 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65588 |
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ARCTIC |
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34 |
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4 |
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