Polar bears are an arctic, marine adapted species that is closely related to brown bears.
Genome analyses have shown that polar bears are distinct and genetically homogeneous in …

Polar bears (Ursus maritimus) and brown bears (Ursus arctos) are sister species possessing
distinct physiological and behavioural adaptations that evolved over the last 500,000 years …

Despite extensive genetic analysis, the evolutionary relationship between polar bears
(Ursus maritimus) and brown bears (U. arctos) remains unclear. The two most recent …

The polar bear (Ursus maritimus) has become a symbol of the threat to biodiversity from
climate change. Understanding polar bear evolutionary history may provide insights into …

Recent genomic analyses have provided substantial evidence for past periods of gene flow
from polar bears (Ursus maritimus) into Alaskan brown bears (Ursus arctos), with some …

Polar bears (PBs) are superbly adapted to the extreme Arctic environment and have become
emblematic of the threat to biodiversity from global climate change. Their divergence from …

Bears are iconic mammals with a complex evolutionary history. Natural bear hybrids and
studies of few nuclear genes indicate that gene flow among bears may be more common …

Recently, an extensive study of 2,748 polar bears (Ursus maritimus) from across their
circumpolar range was published in PLOS ONE, which used microsatellites and …

The primary habitat for polar bears is sea ice, yet unlike most of the high Arctic, Hudson Bay
undergoes a summer ice-free period that forces all bears ashore until ice forms again in fall …

The brown bears of coastal Alaska have been recently regarded as comprising from one to
three distinct genetic groups. We sampled brown bears from each of the regions for which …