Digestibility of Plants in Ruminal Fluids of Barren-Ground Caribou
Bibliographic Data
| ID | 16866256 |
|---|---|
| Authors | Donald C Thomas, Peter Kroeger |
| Year | 1981 |
| Volume | 34 |
| Issue | 4 |
| Publication date | 1981-01-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | ARCTIC (JOURNAL) |
| Journal identifiers | ISSN: 0004-0843 • E-ISSN: 1923-1245 |
| Publisher | The Arctic Institute of North America (PUBLISHER) |
| DOI | 10.14430/arctic2536 |
| OpenAlex | W2156711752 |
| Language | EN |
| Citations received | 3 |
| References cited | 1 |
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
Agronomy · Arctic · Biology · Botany · Carex · Dry matter · Lichen · Climate change and permafrost · Ecology · Indigenous Studies and Ecology · Ruminant Nutrition and Digestive Physiology
Diet and Habitat of Mountain Woodland Caribou Inferred from Dung Preserved in 5000-year-old Alpine Ice in the Selwyn Mountains, Northwest Territories, Canada
In Vitro Digestibilities of Plants Utilized by Barren-Ground Caribou
In Vitro Digestibilities of Summer Forages Utilized by the Rivière George Caribou Herd
| Citations per year | 0.07 |
|---|---|
| Citation span | 1984 - 2012 (29) |
| Highly cited | No |