Two species are emblematic of Arctic sea ice: the polar bear (Ursus maritimus
) and the Pacific walrus (Odobenus rosemarus).
The main prey of polar bears (Ursus maritimus
) are ringed seals (Phoca hispida), bearded seals (Erignathus barbatus), and harp seals (Pagophilus groenlandicus) (Lono 1970; Smith 1980), and polar bears are thus the ultimate apex predator in the arctic marine ecosystems.
Six polar bears (Ursus maritimus
) were confiscated from the Suarez Brothers Circus on November 5, 2002 in Yabucoa, Puerto Rico and moved to new homes in three U.S.
Key words: polar bear; Ursus maritimus
; grizzly bear; Ursus arctos; hybrid; microsatellites; High Arctic; Northwest Territories; Viscount Melville Sound
Arctic animals live far from most pollution sources, but some species such as the polar bear (Ursus maritimus
) and the beluga whale (Delphinapterus leucas) have been reported to have very high levels of some POPs (Andersen et al.
Increasing interactions of polar bears (Ursus maritimus
) with human activity, combined with impacts of climate change, are of critical concern for the conservation of the species.
Polar Bear (Ursus maritimus
) Behavior near Icebreaker Operations in the Chukchi Sea, 1991.
We eliminated all but the polar bear (Ursus maritimus
) using this process, which suggested that an individual of this species was responsible for the skeletal trauma.
Polar bears (Ursus maritimus
) are an iconic Arctic species, but residents of Arctic coastal communities are among the few who have opportunities to observe their behavior for extended periods of time.
The arctic ecosystem supports polar bears (Ursus maritimus
), arctic foxes (Alopex lagopus), musk oxen (Ovibos moschatus), waterfowl, and small mammals.
Throughout their circumpolar range, pregnant female polar bears (Ursus maritimus
) create snow dens in which they give birth to altricial cubs.
The National Petroleum Reserve--Alaska (NPR-A) in northeastern Alaska provides winter maternal denning habitat for polar bears (Ursus maritimus
) and also has high potential for recoverable hydrocarbons.