scholarly journals Population Viability of Barren-ground Grizzly Bears in Nunavut and the Northwest Territories

ARCTIC ◽  
2003 ◽  
Vol 56 (2) ◽  
Author(s):  
Mitchell K. Taylor ◽  
H. Dean Cluff ◽  
Robert J. Gau ◽  
Robert Mulders ◽  
Ray L. Case ◽  
...  
Keyword(s):  
Northwest Territories ◽  
Population Viability ◽  
Grizzly Bears ◽  
Barren Ground

Den selection by barren-ground grizzly bears, Mackenzie Delta, Northwest Territories

Polar Biology ◽  
2016 ◽  
Vol 40 (3) ◽  
pp. 503-516 ◽  
Author(s):  
Corey A. Smereka ◽  
Mark A. Edwards ◽  
Jodie Pongracz ◽  
Marsha Branigan ◽  
Nicholas W. Pilfold ◽  
...  
Keyword(s):  
Northwest Territories ◽  
Grizzly Bears ◽  
Mackenzie Delta ◽  
Barren Ground

Demography of barren-ground grizzly bears

2003 ◽  
Vol 81 (2) ◽  
pp. 294-301 ◽  
Author(s):  
Philip D McLoughlin ◽  
Mitchell K Taylor ◽  
H Dean Cluff ◽  
Robert J Gau ◽  
Robert Mulders ◽  
...  
Keyword(s):  
Survival Rate ◽  
Litter Size ◽  
Birth Interval ◽  
Ursus Arctos ◽  
Survival Rates ◽  
Grizzly Bears ◽  
Adult Males ◽  
Barren Ground ◽  
Rate Of Increase ◽  
The Mean

Between May 1995 and June 1999, we equipped 81 barren-ground grizzly bears (Ursus arctos) with satellite radio collars within a study area of 235 000 km2, centred 400 km northeast of Yellowknife, Northwest Territories, Canada. We used data from radiotelemetry to estimate survival rates, reproductive parameters, and the finite rate of increase of the population (λ). The annual survival rate of adult females was estimated at 0.979 (95% confidence intervals (CI) = 0.955–0.998), while the survival rate of adult males was 0.986 (95% CI = 0.942–1.0). The cub survival rate was 0.737 (95% CI = 0.600–0.844) and the yearling survival rate was 0.683 (95% CI = 0.514–0.821). Cub litter size averaged 2.23 (SE = 0.13, n = 35), while yearling litter size decreased to a mean of 1.86 (SE = 0.12, n = 35). The mean litter size of females with 2-year-olds was 1.85 (SE = 0.15, n = 20). The mean birth interval was 2.8 years (SE = 0.3 years, n = 17). The mean reproductive interval, which is calculated by excluding the loss of whole litters from the sample, was 3.9 years (SE = 0.4 years, n = 9). Mean litter size divided by mean birth interval yielded an annual natality rate of 0.81 cubs per adult female per year. The mean age at first parturition was 8.1 years (SE = 0.5 years, n = 10). We believe the population to be currently stable or slightly increasing (λ = 1.033, 95% CI = 1.008–1.064).

Feeding Patterns of Barren-ground Grizzly Bears in the Central Canadian Arctic

ARCTIC ◽  
2002 ◽  
Vol 55 (4) ◽  
Author(s):  
Robert J. Gau ◽  
Ray Case ◽  
David F. Penner ◽  
Philip D. McLoughlin
Keyword(s):  
Canadian Arctic ◽  
Grizzly Bears ◽  
Feeding Patterns ◽  
Barren Ground

Game Conservation in Arctic Canada

Polar Record ◽  
1942 ◽  
Vol 3 (23) ◽  
pp. 499-509
Author(s):  
Brian Roberts
Keyword(s):  
Northwest Territories ◽  
Human Population ◽  
Large Degree ◽  
Wild Animals ◽  
Arctic Canada ◽  
Barren Ground ◽  
Slow Development ◽  
Musk Ox

It is only within comparatively recent years that the problem of conserving the game resources of the Northwest Territories has become a matter requiring the serious attention of those responsible for the administration of the Territories. The slow development of a crisis arose from the lack of co-ordinated knowledge and from the assumption that a sparse human population scattered over an immense area would not necessarily lead to any serious depletion in the numbers of wild animals. Fortunately investigation was begun and a measure of control effected in time; otherwise the story of the plains buffalo might have been repeated in the barren-ground caribou, as it was to a large degree in the musk ox, which are now reduced on the mainland to a few small herds within or close to the Thelon Game Sanctuary.

scholarly journals Estimation of trends in zone of influence of mine sites on barren-ground caribou populations in the Northwest Territories, Canada, using new methods

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
John Boulanger ◽  
Kim G. Poole ◽  
Anne Gunn ◽  
Jan Adamczewski ◽  
Jack Wierzchowski
Keyword(s):  
Northwest Territories ◽  
Barren Ground ◽  
New Methods ◽  
Zone Of Influence ◽  
Mine Sites

scholarly journals Defining the Pen Islands Caribou Herd of southern Hudson Bay

Rangifer ◽  
1998 ◽  
Vol 18 (5) ◽  
pp. 33 ◽  
Author(s):  
Kenneth F. Abraham ◽  
John E. Thompson
Keyword(s):  
Boreal Forest ◽  
Northwest Territories ◽  
Hudson Bay ◽  
Critical Importance ◽  
Woodland Caribou ◽  
Barren Ground

In this paper, we describe the Pen Islands Herd of caribou, the largest aggregation of caribou in Ontario (it also occupies a portion of northeastern Manitoba). Photographic counts showed the herd had a minimum population of 2300 in 1979, 4660 in 1986, 7424 in 1987 and 10 798 in 1994. Throughout the 1980s, the Pen Islands caribou exhibited population behaviour similar to migratory barren-ground caribou herds, although morphology suggests they are woodland caribou or possibly a mixture of subspecies. The herd had well-defined traditional tundra calving grounds, formed nursery groups and large mobile post-calving aggregations, and migrated over 400 km between tundra summer habitats and boreal forest winter habitats. Its migration took it into three Canadian jurisdictions (Ontario, Manitoba, Northwest Territories) and it was important to residents of both Manitoba and Ontario. It is clear that the herd should be managed as a migratory herd and the critical importance of both the coastal and variable large winter ranges should be noted in ensuring the herd's habitat needs are secure.

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