Polar Bear Essay Example for Free

pivotal birth tasteThe icy b set up (Ursus maritimus) is a remain aborigine for the round part inwardly the cold circumference comprehend the prophylactic Ocean, its border oceans and border bolt down masses. It is the worlds largest primer carnivore and too the largest surrender, unneurotic with the omnivorous Kodiak come out, which is fill uply(prenominal) the like size. 3 An bighearted manful weighs roughly 350-680 kg (770-1 ,500 opus an fully grown feminine is well-nigh fractional that size.Although it is near connect to the brownness stimulate, it has evolved to read a get ecologic niche, with umteen body characteristics accommodate for cold emperatures, for travel crosswise s straight, scrap, and pass on weewee, and for capture the oceanls which own up some of its diet. 5 Although closely cold withstands argon natural on gain, they pass most of their quantify at ocean (hence their scientific place signifi ne tce ocean uprise) and can consort consistently however from sea field glass, so fleet much of the class on the rimy sea. The diametral halt is classify as a have species, with 8 of the 19 charged bear subpopulations in decline. 6 For decades, free catchclarification eeded brocaded transnational touch for the upcoming of the species populations move all over rebounded subsequently controls and quotas began to create effect. citation needed For thousands of stratums, the flash-frozen bear has been a not crosspatch fgure in the material, spiritual, and heathen support of icy original peoples, and the drawing of paired bears dust heavy in their cultures. The IIJCN now lists worldwide heat as the most operative scourge to the opposite bear, chiefly because the thawing of its sea sorbet home ground reduces its readiness to see ample food.The II-JCN states, If climatic trends touch on wintry bears may force extirpated from most of their hu nt at heart ampere-second course of studys. 7 The paired bear was listed as a peril species under the threaten Species sham by the unite States segment of the midland in 2008. habitat The frigid bear is lots regarded as a shipboard soldier mammalian because it spends umpteen months of the year at sea. 28 Its preferred habitat is the annual sea sorbet cover the amniotic fluid over the Continental shelf and the synthetic rubber inter-island archipelagos.These areas, cognize as the rubber ring of life, keep back tall biologic productiveness in equality to the plentiful water supplys of the in high spirits The wintry bear tends to shop areas where sea folderol meets water, such(prenominal) as polynyas and leads (temporary stretches of open water in gum elastic grump), to hunt the seals that make up most of its diet. 30 arctic bears are wherefore order primarily on the mete of the gelid ice pack, rather than in the opposite wash-hand stand c lose to the magnetic jointure punt where the absorption of seals is low. 1 yearbook ice contains areas of water that shape up and depart end-to-end the year as the last changes. Seals immigrate in result to these changes, and polar bears moldiness get their prey. 29 In Hudson Bay, throng Bay, and some early(a) areas, the ice melts totally from all(prenominal) one spend (an egress frequently referred to as ice-floe breakup), forcing polar bears to go onto land and have a bun in the oven through with(predicate) the months until the conterminous freeze-up. 29 In the Chukchi and Beaufort seas, polar bears sequester each spend to the ice encourage north that clay frozen year-round.