Short Report on Polar Bears

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How is polar bear cub survivability being affected by global warming? Polar Bear numbers are currently in decline. A main factor of this is the loss of polar bear cubs because of the global warming. [1] it has been confirmed by the U.S Geological Survey Alaska Science Center, that polar bear cubs are drowning due to the loss of ice and are forced to swim long distances[1]. The issue The researchers have been tracking the bears with GPS tracking collars in order to determine the extent of their journeys. [2]Of the bears that were tracked, eleven bears that swam long distances had young cubs at the time of the collar deployment. Five of those bears lost their cubs while swimming, a 45% mortality rate. Among cubs not compelled enough to swim long distances, the mortality rate was 18 percent. According to a report done by the National Snow and Ice Centre in Boulder, Colorado, that in June 2011, less sea ice covered the Arctic than in any year, since records began in 1979[2]. Polar bear cubs in Alaska’s Beaufort Sea are much less likely to survive compared to 20 years ago due to the melting sea ice. [3]Published by the U.S. Geological Survey, the study estimated that only 43 percent of polar bear cubs in the southern Beaufort Sea survived their first year during the past five years, compared to a 65 percent survival rate in the late 1980s and early 1990s. The falling survival rate comes as a warming climate has melted much of the sea ice off Alaska’s northern coast, limiting polar bears from hunting for food at the ice’s edge[3]. Polar bear cubs aren't just drowning from starvation, when arctic storms create violent and hostile swimming environments, the polar bear cubs are dragged under unable to call up enough strength against pounding waves, which they are forced to swim through to get to better hunting grounds. Researchers at the University of Alberta

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