| brucella suis biotype 4: a case of granulomatous nephritis in a barren ground caribou (rangifer tarandus groenlandicus l.) with a review of the distribution of rangiferine brucellosis in canada. | severe granulomatous nephritis caused by brucella suis biotype 4 was found in a barren ground caribou (rangifer tarandus groenlandicus) from northwest territories, canada. a review of the distribution of human and animal cases of brucellosis in northern canada indicated that b. suis biotype 4 is distributed widely and is probably enzootic in most canadian caribou herds. | 1986 | 2902236 |
| prevalence of toxoplasma gondii antibodies in barren-ground caribou (rangifer tarandus groenlandicus) from the canadian arctic. | prevalence of antibodies to toxoplasma gondii was determined in 147 barren-ground caribou (rangifer tarandus groenlandicus) from 5 herds in the northwest territories and nunavut, northern canada, by the modified agglutination test (mat). in the mainland herds (bluenose, bathurst, and beverly), antibodies were found in 43 (37%) of 117 caribou, and mat titers were 1:25 in 10, 1:50 in 24, and 1:500 in 9. in the island herds, only 1 (4.3%) of 23 animals sampled from the north baffin island herd was ... | 2001 | 11318582 |
| Subpopulation structure of caribou (Rangifer tarandus L.) in arctic and subarctic Canada. | Effective management and conservation of species, subspecies, or ecotypes require an understanding of how populations are structured in space. We used satellite-tracking locations and hierarchical and fuzzy clustering to quantify subpopulations within the behaviorally different barren-ground caribou (Rangifer tarandus groenlandicus), Dolphin and Union island caribou (R. t. groenlandicus x pearyi), and boreal (R. t. caribou) caribou ecotypes in the Northwest Territories and Nunavut, Canada. Using ... | 2011 | 21939065 |
| development and availability of the free-living stages of ostertagia gruehneri, an abomasal parasite of barrenground caribou (rangifer tarandus groenlandicus), on the canadian tundra. | climate change in the arctic is anticipated to alter the ecology of northern ecosystems, including the transmission dynamics of many parasite species. one parasite of concern is ostertagia gruehneri, an abomasal nematode of rangifer ssp. that causes reduced food intake, weight loss, and decreased pregnancy rates in reindeer. we investigated the development, availability, and overwinter survival of the free-living stages of o. gruehneri on the tundra. fecal plots containing o. gruehneri eggs were ... | 2012 | 22717158 |
| estimating changes in lichen mat volume through time and related effects on barren ground caribou (rangifer tarandus groenlandicus) movement. | lichens form a critical portion of barren ground caribou (rangifer tarandus groenlandicus) diets, especially during winter months. here, we assess lichen mat volume across five herd ranges in the northwest territories and nunavut, canada, using newly developed composite landsat imagery. the lichen volume estimator (lve) was adapted for use across 700 000 km2 of barren ground caribou habitat annually from 1984-2012. we subsequently assessed how lve changed temporally throughout the time series fo ... | 2017 | 28328953 |
| barren-ground caribou (rangifer tarandus groenlandicus) behaviour after recent fire events; integrating caribou telemetry data with landsat fire detection techniques. | fire regimes are changing throughout the north american boreal forest in complex ways. fire is also a major factor governing access to high-quality forage such as terricholous lichens for barren-ground caribou (rangifer tarandus groenlandicus). additionally, fire alters forest structure which can affect barren-ground caribou's ability to navigate in a landscape. here, we characterize how the size and severity of fires are changing across five barren-ground caribou herd ranges in the northwest te ... | 2017 | 27506958 |