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Swimming Polar Bear
The rapid red ink of sea frosting is forcing polar bears to go for longer swim , according to enquiry .
Two gelid bears rest on an ice ice-cream soda .
Biologists are discourage that warm temperatures from climate alteration are forcing polar bears to swim longer distance to retrieve unchanging sea deoxyephedrine .
Polar Bears
Researchers follow a group of grownup polar bears wearing GPS collar find a 45 pct mortality rate rate among the cubs of those who swam 30 mile or more at a time , as compared with an 18 pct fatality rate rate among the cubs of other frigid bears .
According to the University of Washington Polar Science Center , Arctic ocean - ice level have dropped to track record lows in July 2011 , with sea chicken feed volume now 47 pct lower than it was in 1979 , when satellite record began .
Long - space swim expends large amounts of vitality , putting the diametric bear at jeopardy of drowning due to fatigue duty or rough seas .
A swim?
A polar bear gazes at the unresolved weewee in the Arctic Ocean . Image taken during an Arctic Research Office - Ocean Exploration cruise in 2003 to the Chukchi Plateau .
Biggest bears
An grownup male polar bear grows usually weigh between 775 to 1,200 pounds ( 351 to 544 kilograms ) and will reach its full adult size between the long time of 8 and 14 . Adult females are half the sizing — 330 to 650 pounds ( 50 to 295 kg ) — and reach full size of it at around long time 5 - 6 geezerhood . This paradigm was taken during an Arctic Research Office - Ocean Exploration cruise in 2003 to the Chukchi Plateau .
Suited for Ice
The diametrical bear is perfectly suitable to its frigid , glacial habitat : They have two layers of fur — glossy , waterproofed ' sentry duty ' pilus and dense under - fur — and a thick layer of fat — 2 to 4 inches ( 5 to 10 centimeter ) — beneath their tegument that helps keep them warm . They also have diminished a little tail and ears , which help prevent heat passing .
Standing tall
The height of diametric bears at their shoulders when they are on all fours is commonly between 3.5 to 5 feet ( 1 to 1.5 meters ) for males and females , though when they stand on two pegleg they look even more redoubtable .
