Its name in Latin means Tyrant Sea Bear. In Russian, it is usually called бе́лый медве́дь (bélyj medvédj, the white bear), though an older word still in use is ошку́й (Oshkúj, which comes from the Komi oski, "bear"). 475–485 in Wild furbearer management and conservation in North America (M. Novak, J. Ursus eogroenlandicusUrsus groenlandicusUrsus jenaensisUrsus labradorensisUrsus marinusUrsus polarisUrsus spitzbergensisUrsus ungavensisThalarctos maritimus, The polar bear (Ursus maritimus) is a hypercarnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. Elsewhere, a slightly larger estimated average weight of 260 kg (570 lb) was claimed for adult females. The most accurate counts require flying a helicopter in the Arctic climate to find polar bears, shooting a tranquilizer dart at the bear to sedate it, and then tagging the bear. , According to the World Wildlife Fund, the polar bear is important as an indicator of Arctic ecosystem health.  The Yupik also refer to the bear as nanuuk in Siberian Yupik. Ursus spelaeus – the giant cave bear – roughly 1000 pounds. In unusually warm conditions, the hollow tubes provide an excellent home for algae. Thus, now the Alaskan population more resembles the world population in that it is more likely to den on land. WHAT MAKES A GUINNESS WORLD RECORDS TITLE? Discover (and save!) The study did not determine if the others lost their cubs before, during, or some time after their long swims. , In addition to creating nutritional stress, a warming climate is expected to affect various other aspects of polar bear life: changes in sea ice affect the ability of pregnant females to build suitable maternity dens. років тому). While the oldest fossil is 100,000 years old, they are thought to have evolved between 100,000 and 250,000 years ago from a population of brown bears likely isolated by glaciation.  As of 2006, in Alaska, 42% of cubs were reaching 12 months of age, down from 65% in 1991. Based on the fossil record, Kurtén (1964) recommended the Phipps (1774) name Ursus maritimus, which was promoted by Harington (1966), , The Inuit and Alaska Natives have many folk tales featuring the bears including legends in which bears are humans when inside their own houses and put on bear hides when going outside, and stories of how the constellation that is said to resemble a great bear surrounded by dogs came into being. Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall. In the early 20th century, Norwegian hunters were harvesting 300 bears per year at the same location. The killing of females and cubs was made illegal in 1965. 2K Views. Norway passed a series of increasingly strict regulations from 1965 to 1973, and has completely banned hunting since then.  Satiated polar bears rarely attack humans unless severely provoked. In the wild, old polar bears eventually become too weak to catch food, and gradually starve to death.  As of 2015, the International Union for Conservation of Nature (IUCN) reports that the global population of polar bears is 22,000 to 31,000, and the current population trend is unknown. Importing products made from polar bears had been prohibited from 1972 to 1994 under the Marine Mammal Protection Act, and restricted between 1994 and 2008. In Hudson Bay, James Bay, and some other areas, the ice melts completely each summer (an event often referred to as "ice-floe breakup"), forcing polar bears to go onto land and wait through the months until the next freeze-up. your own Pins on Pinterest During these four months, the pregnant female eats prodigious amounts of food, gaining at least 200 kg (440 lb) and often more than doubling her body weight. Inner diameter of the ulna to adopt other cubs & Westdal, H.. 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