• Corpus ID: 16419877

The Polar Bear — Ursus Maritimus Biology, Management, and Conservation

  title={The Polar Bear — Ursus Maritimus Biology, Management, and Conservation},
  author={George A. Feldhamer and Bruce C. Thompson},

Diet-driven mercury contamination is associated with polar bear gut microbiota

Investigating associations between diet-acquired mercury and microbiota of polar bears inhabiting the southern Beaufort Sea illustrates a potentially overlooked outcome of mercury accumulation in polar bears.

Shifts in female polar bear (Ursus maritimus) habitat use in East Greenland

Results indicate that multi-decadal loss of sea ice has resulted in shifts in polar bear habitat use in EG, and there was a statistically significant and stronger winter preference in the 2000s for adult females to select for higher sea ice concentrations.

Unusual hunting and feeding behaviour of polar bears on Spitsbergen

ABSTRACT Prolonged chasing of an adult reindeer (Rangifer tarandus) by a polar bear (Ursus maritimus) was observed both on land and in the sea, in Magdalenefjorden, northwest Spitsbergen. Polar bears

Skull Foramina Asymmetry in East Greenland and Svalbard Polar Bears (Ursus maritimus) in Relation to Stressful Environments

The Svalbard bears had higher FA in number of intracondylar foramina than had those from East Greenland, a trend corresponding well with skull differences found previously between the two subpopulations.

Temporal and Spatial Variation in Metric Asymmetry in Skulls of Polar Bears (Ursus maritimus) from East Greenland and Svalbard

Signs were of subpopulations with declining levels of FA over time, suggesting the existence of positive population level effects powerful enough to overrule the influence of stress caused by global warming, pollution, and overharvesting.

Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus)

The differences found in the present study between the two polar bear subpopulations support the notion that East Greenland and Svalbard polar bears probably should be managed as separate units.


The geographical designations employed in this document do not imply the expression of any opinion whatsoever on the part of the CMS Secretariat (or the United Nations Environment Programme)



Denning Ecology of Polar Bears in the Canadian Arctic Archipelago

From April 1989 through June 1992, we studied the denning ecology of 45 female polar bears in the Canadian Arctic archipelago, around M'Clure Strait and Viscount Melville Sound. Activity level of

Polar bear denning and cub production in Svalbard, Norway

Etude de la densite des terriers d'Ursus maritimus, entre 1972 et 1980, du nombre de petits produits et de leur mortalite

Polar bear predation of ringed and bearded seals in the land-fast sea ice habitat

Predation of seals by the polar bear, Ursus maritimus, was not significant in the Western Arctic. In the High Central and Eastern Arctic, and along southeastern Baffin Island, bear predation of the

Pregnancy rates and serum progesterone levels of polar bears in western Hudson Bay

Based on progesterone levels, implantation appeared to occur between mid-September and mid-October, likely followed by parturition from mid-November to mid-December, and the annual pregnancy rate of solitary females, as determined.

Past and present status of polar bears in Alaska

Seasonal and geographical variation of organochlorines in waterfowl from California and Mexico and local contamination in the lower Rio Grande Valley, Texas reflect local contamination of fishes and birds.

The Population Dynamics of Polar Bears in Western Hudson Bay

The changes in reproduction, weight, and cub mortality are consistent with the predictions of a densitydependent response to increasing population size.

A multiple mark and recapture estimate applied to polar bears

The mark–recapture technique described in this paper estimates polar bear (Ursus maritimus) populations for all sample periods except the first sample period, incorporates an open population model,

Interspecific and intraspecific mitochondrial DNA variation in North American bears (Ursus)

Comparing mitochondrial DNA variation in North American black bears, brown bears, and polar bears indicates that there has been maintenance of polymorphism and considerable gene flow throughout the history of the species.

Genetic structure of the world’s polar bear populations

It is suggested that the observed pattern of genetic discontinuities has developed in response to differences in the seasonal distribution and pattern of sea ice habitat and the effects of these differences on the distribution and abundance of seals.