Rockville is absolutely correct. Global warming and humans with guns.
2007-01-09 07:46:10
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answer #1
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answered by intrepid 5
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Polar bears are the world's largest land-based predator. They have only one enemy, traditional Inuit natives who hunt the bear for their meat and fur. But now they have another enemy - human-caused global warming. Today, ice melts in the Hudson three weeks earlier in the spring than it did just 25 years ago.
The increasing sun and early ice melt means there is less time for the polar bears to fatten up for the summer months when they won't have access to the seals. Polar bears amass most of their body fat during their spring feast of ringed seals. When the ice disappears earlier, they aren't able to put on as much fat. That fat is critical for the males, but even more critical for the females who must fast an additional period while they nurse their cubs. Females lose an enormous amount of weight giving birth and caring for their cubs, but gain it back if they have enough time on the ice. One female weighed only 250 pounds after her pup's birth, but ballooned to 880 the next year.
But scientists have noted a 10 percent drop in the number of cubs born in the last 20 years. Adult bears are also 10 percent thinner. At a lower body weight, females have a tougher time nursing, which is part of the reason there are fewer cubs. Female polar bears use snow dens to give birth to their cubs. But rising temperatures can affect these dens themselves. If the dens melt early, the cubs are exposed to the outside world too soon. The same is also true for the ringed seals, which are the prey of the polar bears. They use snow dens to shelter their young. Without the snow dens the health of both predator and prey are affected.
2007-01-09 05:20:24
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answer #2
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answered by Anonymous
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Enemies of an polar bear is, People, Warlus, and other polar bears. But a Polar bears most worst enemy is the Killer Whale.
2007-01-09 05:17:32
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answer #3
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answered by DanE 7
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Just like any other living creature it is MAN even man is his own worse enemy.....the only thing more dangerous to a man besides himself is a WOman......lol
Global warming if you consider it still falls back on man as the creators
2007-01-09 05:20:58
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answer #4
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answered by vulcan_chef 2
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Humans.
2007-01-09 05:18:38
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answer #5
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answered by tom_cat_2k3 2
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I would say man. Both directly and indirectly. Some people still hunt them, but most are affected by environmental changed caused by man, such as buldings, pipelines, and global warming.
2007-01-09 05:18:25
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answer #6
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answered by Jon C 6
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The combination of the two first answers
2007-01-09 05:18:17
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answer #7
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answered by Rockvillerich 5
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human beings with guns
2007-01-09 05:17:03
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answer #8
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answered by Doofus B 3
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Man.
Have a nice day.
2007-01-09 05:18:19
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answer #9
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answered by Ringo 3
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global warming
2007-01-09 05:16:50
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answer #10
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answered by I hate friggin' crybabies 5
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