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 Polar Bear -- General Discussion
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By: jkr (offline) on Friday, January 08 2010 @ 02:37 PM EST (Read 4712 times)  
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This thread is for general discussion of Polar bears.




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By: jkr (offline) on Saturday, January 29 2011 @ 12:50 PM EST  
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Polar bear swims 9 days straight

A female polar bear, equipped with a radio-tracking collar, swam the equivalent of 16 marathons back-to-back off the coast of Alaska, researchers report.

After swimming nearly 700 kilometres through the Beaufort Sea over nine days, she went on to swim and walk intermittently on the sea ice for an additional 1,800 kilometres over a period of about two months, according to a report published in the January issue of Polar Biology.

The study demonstrates that bears can adapt in some ways to the loss of sea ice in the Arctic as a result of climate change, said George Durner, a research zoologist with the U.S. Geological Survey who co-authored the paper.

"They can swim between ice floes that are far apart. They can swim between ice and land, even though that distance can be great," he said.

But it also shows that doing so can have a negative impact, he added. The bear lost 22 per cent of her body weight and her year-old cub over the course of her journey, and had obviously been food-deprived.

Read more: http://www.cbc.ca/technology/story/2011 ... z1CRoiPlSS




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By: jwnix (offline) on Monday, January 31 2011 @ 08:58 AM EST  
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astonishing the cub could keep up with that long a swim!!! it is indeed amazing when we are able to learn details like this re: animals that are allowed to remain free. some of the light transmitters are revealing astonishing information about how other species get on in this planet!!!!
great article....thanks for posting. am going to look and see if they still run a cam at churhill......


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By: Debs (offline) on Tuesday, February 08 2011 @ 08:13 PM EST  
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Here is another negative aspect of global warming that is affecting our Polar Bear :cry1: popluations....

Polar bear births fall in warming climate: study
Last Updated: Tuesday, February 8, 2011
CBC News


Canadian researchers predict 55 to 100 per cent of pregnant polar bears in western Hudson Bay will not have any cubs if the ice breaks up two months earlier than in the 1990s. (Steve Amstrup/U.S. Fish and Wildlife Service/Associated Press)
Polar bears will have drastically fewer cubs and more miscarriages as the ice melts on Hudson Bay, Alberta researchers predict.

In fact, if the ice melts one month earlier than in the 1990s, 40 to 73 per cent of pregnant female bears living on the western side of the bay will not carry their pregnancies to term, says the study led by University of Alberta biostatistician Péter Molnár.

The study was published Tuesday in Nature Communications.

Here is the link to the entire news article on CBC News

http://www.cbc.ca/technology/story/2011 ... imate.html


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By: macdoum (offline) on Wednesday, February 09 2011 @ 05:48 PM EST  
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This is a video of a captive polar bear and her cub. I bring it here so you can hear this familiar sound.Grin ;


http://www.youtube.com/watch?v=1ddrug5cEoA&NR=1

It is nice to see and hear. See that even when the cub has nursed his/her fill it still has a 'word' to say.Left thumb up


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By: jwnix (offline) on Wednesday, February 09 2011 @ 05:57 PM EST  
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that's amazing!!! clearly it is not exclusive to the Ely bear cubs..... I wonder if it is similar contented sounds like cats purr??? thanks for this M!!!

Quote by: macdoum

This is a video of a captive polar bear and her cub. I bring it here so you can hear this familiar sound.Grin ;

It is nice to see and hear. See that even when the cub has nursed his/her fill it still has a 'word' to say.


jwnix
Black Bear Conservation Coalition www.bbcc.org


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By: jkr (offline) on Friday, October 14 2011 @ 11:50 AM EDT  
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A sad tale of what can happen when an animal is kept in captivity.
I'm wondering WHY does a Canadian zoo keep bears in captivity when they are native to our country. So sad.


Polar bear cub clings to life after siblings die


Only one of three newborn polar bears was still clinging to life in the intensive-care unit of the Toronto Zoo on Thursday, after his two siblings succumbed to injuries inflicted by their mother.

Zoo workers are struggling to keep the tiny cub alive, born prematurely on Tuesday and then rejected by its mother, 10-year-old Aurora.

"Less than 48 hours after birth, a second newborn polar bear cub succumbed to wounds inflicted by its mother," the zoo said in a statement. "An uninjured male cub remains in the zoo's intensive care unit under 24-hour care with staff being hopeful that each day he will get stronger."

On Wednesday, zoo workers noticed Aurora was lashing out against her young and quickly intervened in an effort to save the newborns, two males and one female. One of the cubs died immediately. The zoo did not provide details. Staff removed the two other cubs, taking them to the facility's ICU.

The surviving cub was receiving "round the clock care," the zoo said in a statement on Wednesday.

The zoo has not provided details on why the mother polar bear might have turned on her cubs, but Wayne Goodey, a zoologist at the University of British Columbia, said stress caused by being in captivity may have played a role. In the zoo staff's excitement over the births, Goodey said it's also possible the extra attention may have caused further stress on the mother.

"You can believe for sure that the zoo staff were all glued to the windows watching what was going on ... there could have been a fair bit of cheering when the babies popped out," he said. "She might have been quite upset and troubled by that kind of activity."

In the wild, the survival rate of polar bear cubs is not high, and it's not unheard of for polar bears to eat their cubs.

When faced with stressful factors like not being able to hunt seal, its main food source, due to melting Arctic sea ice, Goodey said male polar bears will often eat cubs. "It's an easy meal," he explained. "It's easier than hunting a seal."

In nature, mother polar bears will also sometimes eat their young when they seem to be ill. Polar bears typically give birth at the end of November and in December. This week's birth is likely the earliest recorded birth of polar bears in captivity, the zoo said.

Being premature, Goodey said it's possible the cubs did not behave as would be expected from normal newborns.

"Normally, they would pop out and they would be pretty quickly ... complaining and moaning and groaning," explained Goodey. "It's possible that she would have perceived them as being sub-normal and therefore might have been inclined to eat them."

Without knowing the specifics of the case, Goodey said his theories are only that - theories.

There is more to this story: http://www.vancouversun.com/travel/Pola ... story.html


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By: eiguoc (offline) on Wednesday, November 02 2011 @ 02:25 PM EDT  
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