ecologists. Severe declines in polar bear populations are more noticeable as periods of sea ice cover are steadily declining. A decrease in sea ice is leading to nutritional stress in polar bears due to shorter periods available in prime hunting grounds. As a necessity to the polar bear’s niche a loss of sea ice has harmful implications to polar bear populations. Not only are hunting grounds being lost but industrialization and human habitation are decreasing the size of the polar bear’s natural habitat
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Polar Bears Suffering: How Global Climate Change is Affecting Their Home Keelei Sage BIO 240 12:30 pm T/Th Dr. Zanatta Fall 2012 When I was about nine-years old I went to the Detroit Zoo for the first time‚ and I remember the best part was getting to go inside the big tunnel and see the polar bears and seals swimming all around me. It was on of the greatest experiences from my childhood‚ and I want my children to be able to have the same experience. Polar bears are one of the most interesting
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In the articles "The Anglerfish Ambush Predator of the Deep"‚ by Larry Brown and "Polar Bear"‚ by Shandra Brady I learned how anglerfish and polar bears adapt to their enviornments. Anglerfish live deep in the sea. Polar bears live in the icey cold artic. These are both hard places to adjust to. Anglerfish have fang-like teeth that are angeled inward for efficent prey grabbing. Female anglerfish have a spine that resembles a fisshing pole sticking out of their back called an "illicium" and at the
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The polar bear‚ also known as the white bear‚ northern bear‚ or sea bear‚ is a large bear native to the Arctic. It is one of the two largest land carnivore species and the top predator within its area. It is well adapted to its habitat: it has thick blubber and fur to insulate to it against the cold as well as white colored fur that camouflages it from its prey. The polar bear hunts well on land‚ on the sea ice‚ as well as in the water. The polar bear is a circumpolar species found in and around
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believe that polar bears are endangered as a species now or in the future? Why or why not? Yes‚ I do believe that polar bears are endangered as a species now and might be in the future. It is because the extinct has been increasing throughout or to a great percentage. Polar bear population as per the data of 2010 was ranging from 20000 to 25000. A female can only deliver only 1 to 3 per littler for every 3 years and its life expectancy is 25 years this threatens the existence of polar bears in the future
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Polar bears. Many think of polar bears living in Antarctica as if they are living in a winter wonderland. Sadly this is not the case. Polar bears everywhere are on a daily struggle to survive. They have a shortage of ice time to hunt and fatten up for the winter. Because of the shortened ice time due to global warming polar bears are under more stress‚ starving‚ and dying. They are struggling over something they cannot control. Polar bears living more south‚ for example in the Hudson Bay region‚
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relationship and hybridization of brown bears (Ursus arctos) and polar bears (Ursus maritimus). Fast morphological evolution has been seen over the years throughout mammals of the earth‚ as it is an important driver of specialization and speciation. Ursus‚ is the genus in the family of Ursidae (bears) that includes polar bears (Ursus arctos)‚ black bears (Ursus americanus)‚ and brown bears (Ursus maritimus). The polar bear and brown bear specifically are closely related
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Polar Bears The polar bear is the largest and most carnivorous bear. It is a marine mammal. The polar bear is found throughout the arctic region including Alaska‚ Canada‚ Russia‚ Greenland‚ and Norway. Polar bears can be as tall as 6-8 feet tall. They can weight can vary from about 200-1‚760 pounds. But‚ when born they are 12 to 14 inches long and weigh around one pound. Polar bear’s lifespan ranges from 20-25 years old. Unlike other bears polar bears do not hibernate during the winter. They are
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While it once might have seemed impossible that the sea ice in the Arctic would ever cease to exist‚ today the trends in melting sea ice are conclusive‚ and the leading cause of polar bears being at risk. In the past thirty years‚ mean world surface temperatures have increased 0.2°C per decade. However‚ in some parts of the Arctic‚ temperatures have increased ten times the rate (Hansen et al‚ 2006). Since the late 1970s there have been major reductions in summer sea ice extent‚ decreases in the extent
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about polar bears. For example‚ is a polar bear’s fur white? Do polar bears hibernate? Where do they have their young? To answer one of your questions‚ polar bears’ fur is actually translucent. Did you know that polar bears don’t hibernate? They do have a den for their young till they are old enough to go outside to hunt for food? These questions and more will all be answered in this informational article about polar bears and their survival in the Arctic. As mentioned before‚ polar bears’
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