polar bear weight in pounds
, Polar bears have long provided important raw materials for Arctic peoples, including the Inuit, Yupik, Chukchi, Nenets, Russian Pomors and others. Polar bears are able to produce water through the metabolism of fats found in seal blubber, and are therefore found primarily along the perimeter of the polar ice pack, rather than in the Polar Basin close to the North Pole where the density of seals is low.. Polar bears hunt seals from a platform of sea ice. Photos, facts, videos from Polar Bears International that funds population, preservation, and DNA studies of the polar bear, Map: Here's where the polar bears are vanishing, https://en.wikipedia.org/w/index.php?title=Polar_bear&oldid=997232797, Taxa named by Constantine Phipps, 2nd Baron Mulgrave, Articles with dead external links from December 2016, Articles with permanently dead external links, Wikipedia indefinitely semi-protected pages, Short description is different from Wikidata, All Wikipedia articles written in Canadian English, Articles containing potentially dated statements from 2016, All articles containing potentially dated statements, Articles with unsourced statements from August 2011, Wikipedia articles in need of updating from December 2019, All Wikipedia articles in need of updating, Creative Commons Attribution-ShareAlike License, This page was last edited on 30 December 2020, at 16:00. Polar bears give birth to one to three cubs at a time, but most often birth twins that weigh only 1.3 pounds (0.6 kg). Shifts in polar bear diet during the ice-free season in western Hudson Bay", "Predation of Svalbard reindeer by polar bears", "White-beaked dolphins trapped in the ice and eaten by polar bears", "Rejected by their mother, polar cubs now under intensive care at Toronto Zoo", "Two cubs die as mother polar bear turns on her three newborns | National Post", "Infanticide and Cannibalism of Juvenile Polar Bears (, "Long-term trends in the population ecology of polar bears in Western Hudson Bay in relation to climatic change", Polar bears, grizzlies increasingly gather on North Slope, "ABC News: Grizzlies encroaching on polar bear Country", "Clash of the fiercest predators as shark eats polar bear", "Polar bears can swim vast distances, study finds", "The vitamin A content and toxicity of bear and seal liver", "U.S. and Russia sign pact to protect the polar bear", "Circumpolar Action Plan: Conservation Strategy for Polar Bears", "Did Polar Bears Really Lose at CITES? One bear lost 51 pounds in just nine days. ", "Magic Number: a Sketchy "Fact" About Polar Bears Keeps Going...And Going... And Going", "Nunavut MLAs condemn U.S. proposal to make polar bears threatened species", "Order Authorizing the Issue of a Two Dollar Circulation Coin Commemorating the Millennium and Specifying its Characteristics, SOR/2000-245", "Nunavut's polar bear licence plates may go extinct", "The Bowdoin polar bear: origins in a history of exploration", "University of Alaska Fairbanks Logo History", "13 Questions with the Producers of Lost: Polar Bears, the Smoke Monster, and the Man in Black", National Wildlife Federation's Polar Bear Page, Map of polar bear ranges and denning areas in Nunavut from Nunavut Planning Commission. Females weigh half as much as their male counterparts, at only … , Polar bears are superbly insulated by up to 10 cm (4 in) of adipose tissue, their hide and their fur; they overheat at temperatures above 10 °C (50 °F), and are nearly invisible under infrared photography. These five nations are the signatories of the International Agreement on the Conservation of Polar Bears, which mandates cooperation on research and conservation efforts throughout the polar bear's range. That same 1000lb polar bear now weighs 1200lbs. In Nunavut, some Inuit have reported increases in bear sightings around human settlements in recent years, leading to a belief that populations are increasing. Seeing as the weight of the average small family car is said to be around 1000kg, a polar bear weighing 700kg is quite a weight. , Polar bear population sizes and trends are difficult to estimate accurately because they occupy remote home ranges and exist at low population densities.  Vehicle licence plates in the Northwest Territories in Canada are in the shape of a polar bear, as was the case in Nunavut until 2012; these now display polar bear artwork instead. This status was re-evaluated and confirmed in April 1999, November 2002, and April 2008. Only with the passage of the treaty did they begin to recover. 4. Like the brown bear, most ungulate prey of polar bears is likely to be young, sickly or injured specimens rather than healthy adults. The cheek teeth are smaller and more jagged than in the brown bear, and the canines are larger and sharper. Males usually reach sexual maturity at six years; however, as competition for females is fierce, many do not breed until the age of eight or ten. , The International Union for Conservation of Nature, Arctic Climate Impact Assessment, United States Geological Survey and many leading polar bear biologists have expressed grave concerns about the impact of climate change, including the belief that the current warming trend imperils the survival of the polar bear. , Females begin to breed at the age of four years in most areas, and five years in the area of the Beaufort Sea.  Adult male polar bears weigh 350–700 kg (770–1,500 lb) and measure 2.4–3 metres (7 ft 10 in–9 ft 10 in) in total length. Polar bears are excellent swimmers.  Cubs may hum while nursing. A good amount of diversity exists in terms of sizing between bear species, so this will have a large impact on the overall weight of the bear. Polar bear adults. Think about that. Interesting Polar Bear Facts 1.  A study in Hudson Bay indicated that both the reproductive success and the maternal weight of females peaked in their mid-teens.Maternal success appeared to decline after this point, possibly because of an age-related impairment in the ability to store the fat necessary to rear cubs.. The mitochondrial DNA (mtDNA) of the polar bear diverged from the brown bear, Ursus arctos, roughly 150,000 years ago.  While they are rare north of 88°, there is evidence that they range all the way across the Arctic, and as far south as James Bay in Canada.  The 13 North American subpopulations range from the Beaufort Sea south to Hudson Bay and east to Baffin Bay in western Greenland and account for about 54% of the global population.  The polar bear tends to frequent areas where sea ice meets water, such as polynyas and leads (temporary stretches of open water in Arctic ice), to hunt the seals that make up most of its diet. Indeed, it has been suggested that Arctic peoples' skills in seal hunting and igloo construction has been in part acquired from the polar bears themselves. Multiple cases of adoption of wild cubs have been confirmed by genetic testing. , After mating, the fertilized egg remains in a suspended state until August or September. Females are smaller, averaging about 550 pounds. Polar bear cubs are 30 cm long at birth and weigh 16 to 24 oz.  Polar bear remains have been found at hunting sites dating to 2,500 to 3,000 years ago and 1,500-year-old cave paintings of polar bears have been found in the Chukchi Peninsula. Male polar bears average nearly 900 pounds in weight, with one weighing in at 1,760 pounds; by comparison, the average brown bear weighs in at 600 pounds.  A boar (adult male) weighs around 350–700 kg (770–1,540 lb), while a sow (adult female) is about half that size. They can be 7.25 to 8 ft tall. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body ch… Females approach their smaller full size at 6.  In 2010, the 2005 increase was partially reversed. 24% had eaten moss recently, 19% had consumed grass, 34% had eaten black crowberry and about half had consumed willows. Soon after age they will put on much weight because of pregnancy.  The bear is umka in the Chukchi language. When they write about the polar bear they call it, Pihoqahiak, meaning the ever-wandering one. The earliest recorded birth of polar bears in captivity was on 11 October 2011 in the Toronto Zoo.  Partners stay together and mate repeatedly for an entire week; the mating ritual induces ovulation in the female.  Polar bears are sometimes the host of arctic mites such as Alaskozetes antarcticus. He was 22. Polar bears appear to be less affected by infectious diseases and parasites than most terrestrial mammals.  In two areas where harvest levels have been increased based on increased sightings, science-based studies have indicated declining populations, and a third area is considered data-deficient. However, a Kodiak Bear does prove a tough opponent. The polar bear also hunts by stalking seals resting on the ice: upon spotting a seal, it walks to within 90 m (100 yd), and then crouches. Both male and female polar bears live to be as much as 30 years old (in a zoo). Adult males weigh from 400 to 600 kilograms (880 to 1,320 pounds) and occasionally exceed 800 kilograms (1,760 pounds). Females usually give birth during the months of November or December, after a gestation of eight months. At this time they weigh up to 33 pounds (115 kg).  The oldest known polar bear fossil is a 130,000 to 110,000-year-old jaw bone, found on Prince Charles Foreland in 2004. 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"). Norway passed a series of increasingly strict regulations from 1965 to 1973, and has completely banned hunting since then. Unlike brown and black bears, polar bears are capable of fasting for up to several months during late summer and early fall, when they cannot hunt for seals because the sea is unfrozen. Females gain as much as 500 kg (1,102 lb) weight when they are pregnant. Scientists have responded by noting that hungry bears may be congregating around human settlements, leading to the illusion that populations are higher than they actually are. Females weigh around 150– 250 kg (331–551 lb).The maximum reported weight in females is 260 kg (573 lb) but it is extremely rare.  Polar bears sometimes swim underwater to catch fish like the Arctic charr or the fourhorn sculpin. Compared to the Antarctic, where there is no major surface predator, Arctic seals use more breathing holes per individual, appear more restless when hauled out on the ice, and rarely defecate on the ice.  Further, some clades of brown bear, as assessed by their mtDNA, were thought to be more closely related to polar bears than to other brown bears, meaning that the brown bear might not be considered a species under some species concepts, but paraphyletic. PCBs have received the most study, and they have been associated with birth defects and immune system deficiency. Researchers in Canada estimated one male bear at 800 kilograms (1,700 pounds)!  The Eisbären Berlin hockey team uses a roaring polar bear as their logo, and the Charlotte, North Carolina hockey team the Charlotte Checkers uses a polar bear named Chubby Checker as their mascot..  Maternity dens, used by pregnant females and by females with infants, can also be disturbed by nearby oil exploration and development. The heaviest polar bear ever recorded at the Guinness Book of World Records measured at 849 to 904 pounds. They can be 7.25 to 8 ft tall. The bear may lie in wait for several hours. At nearly 10 feet long and weighing about 1,600 pounds, the polar bear is likely the largest species of bear in the world, challenged only by the Kodiak Bear, a subspecies of the grizzly bear.Males are significantly larger than females, which normally way no more than 1,000 pounds.  Second, controls of harvesting were introduced that allowed this previously overhunted species to recover. Thalarctos 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. Polar bear cubs weigh less than a kilogram but male cubs are greater than female cubs even at birth. ( 1,000 kg ) countries to co-manage their shared polar bear tissues continued rise... 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