This picture below exemplifies how the polar bears do this acti... ... middle of paper ... ... (2009). Polar Bear (Ursus maritimus) Life History and Population Dynamics in a Changing Climate. Arctic, 62(4), 491-494. Rode, K. D., Regehr, E. V., Douglas, D. C., Durner, G., Derocher, A. E., Thiemann, G. W., & Budge, S. M. (2014). Variation in the response of an arctic top predator experiencing habitat loss: Feeding and reproductive ecology of two polar bear populations.
Polar Bear Evolution is a Continuing Story The polar bear, the largest land carnivore in North America, one of the largest animals in the world and a favorite at zoos worldwide, has, over the years, adapted to its harsh Arctic environment. The appropriately named ‘ursus maritimum’ or sea bear usually lives between 15 and 18 years in the wild and spends most of its life on ice. It is the most recent of the eight bear species. The first polar bear was a brown bear subspecies, with brown bear dimensions and brown bear teeth. The polar bear evolution was rapid due to the small population and extreme pressure to survive.
1914 began the official war of the wolves. This year Congress officially approves funds for the eradication of wolves, cougars, and other destructive animals. Wolves were declared destructive to agricultural and big game interests and formally hunted. Nearly a century later, in 1995, wolves were reintroduced to Yellowstone National Park and Idaho's Frank Church-River of No Return Wilderness(Phillips, 1996, p.20). The reintroduction of wolves in Yellowstone National Park did not end the debate of whether wolves should stay or go.
An observant over the past years show the sudden increase of polar bears being endangered. The polar bear is a meat-eating bear, which normally lives within the Arctic Circle, surrounding sea. Polar bears are threatened directly on how humans treat our earth and our environment involving Global warming and greenhouse gas emissions. A friendly environment helps saving the lives of Polar bears that are being harmed due to our actions. This problem may be solved through various ways by helping to find ways to slow down global warming and to help regulate oil and gas businesses from using certain type of harmful chemicals that harm the Polar Bears and decreasing the rate of hunting being used to kill the polar bears prey.
The polar bear population is estimated to b... ... middle of paper ... ...bears. Work Cited Carlton, Jim. "Is global warming killing the polar bears?" The Wall Street Journal - Online. 14 Dec 2005.
As the weather is up and down, cold one day and then extremely hot the next, no matter the short changed in weather, climate is a huge deal breaker for the future of the polar bear. Are humans responsible for the future of the big white bears that roam around on ice all day trying to survive? Maybe we are, maybe we are not, but polar bears are diminishing due to fluctuating environmental changes, gas and oil activities like drilling in the Atlantic Ocean, and their survival rate is decreasing as a result of starvation. Climate change has been one of the top leading causes of sea ice loss. According to Polar Bear International a study found from satellite pictures starting from the 1900s to now show major sea ice loss.
Analyzing polar bears’ life history will help lay a foundation for understanding why they are currently threatened. Currently there are about 22,000-31,000 polar bears found in 19 subpopulations across the globe (Wiig O et al., 2015). Polar bears have a “circumpolar distribution”: they generally live around the Arctic region around the North Pole, relying heavily on the Arctic ice for hunting, mating, resting, and creating dens (Gunderson, 2009). Their geographic range is determined by the level of ice in coastal areas which differs from summer to winter time. For example, during the winter, polar bears are more often seen at the southern edge of the ice pack versus during the winter they tend to stay on islands and coastal regions that retain ice on land.
Other names for the polar bear include the Inuit word "nanook", and the Norwegian name of Isbjorn which means "ice bear." * Polar bears are members of the bear family Ursidae. They are a carnivorous bear which can be found throughout the Arctic region where they rely on sea ice to sustain their hunting activities. Canada hosts approximately 60% of the polar bear population. Other areas inhabited by polar bears include Alas... ... middle of paper ... ...t of Biological Sciences with the University of Alberta.
The animals that occupy the artic regions have learned to survive the furry of Mother Nature, but still must compete for survival with the top predator of the artic, the polar bear. Polar bears inhabit the circumpolar arctic regions. They live near their primary food source in the ice packs of the artic. The bears inhabit the circumpolar North, which would consist of Canada, Alaska, Greenland, and other regions in the artic. The temperatures range between -40°F to -50°F in the winters and summer temperatures stay around -29°F.
(1993), Khutzeymateen Valley Grizzly Bear Study, Research Branch, Victoria, B.C. Pynn, L. (2000), Protecting ‘God’s’ Country, from Vancouver Sun, Nov. 15/00, Pacific Press, Vancouver, B.C. Pynn, L. (2000), To Kill a Grizzly, from Vancouver Sun, Nov. 16/00, Pacific Press, Vancouver, B.C. Thomas, J. (1998), The Plight of B.C.’s Grizzlies, Nature Canada, Spring98, Vol.