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Author Topic: Do Polar Bears Hibernate in the same manner as other bears given their climate?  (Read 8727 times)

Offline Karen W.

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Well, I was thinking most Bears hibernate during the extreme colds of winter, and given the fact that Polar Bears live where it is freezing all the time, how does hibernation effect them? Are they more Year round creatures because of the need to always forage... fish etc? How does that work?

I really never thought about it until the other night! Do we have any Polar Bear Experts or Neily.. who likes Polar Bears???

Does anyone know?


 

Offline JimBob

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Polar bear females definitely do hibernate to give birth. I am uncertain about male bears.
 

Offline Karen W.

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Thanks Jim Bob.. I did not know that.. I wonder about the males too and how long they hibernate etc.
 

Offline Vcoolspice

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   Polar bears don't enter deep hibernation. Deep hibernation applies to an animal whose body temperature drops to 5C (41F) for a period of days or weeks. Deep hibernators also show a marked drop in heart rate, and are slow to wake up when disturbed. Polar bears aren't deep hibernators, but enter a state of carnivore lethargy. Though hibernating females sleep soundly, they're easily and quickly aroused.

Only pregnant female polar bears hibernate.
   The female polar bear's heart rate slows to about 27 beats per minute from a normal resting heart rate of about 46 beats per minute (Stirling, 1988).
   When hibernating, a female's body temperature may drop slightly, perhaps to 35C (95F), or it may remain normal at 37C (98.6F). Unlike most other hibernators, female polar bears give birth while hibernating. High body temperature is needed to meet the demands of pregnancy, birth, and nursing.

Researchers have found that nonhibernating polar bears, during times of food scarcity, can efficiently utilize their energy reserves much like hibernating bears
« Last Edit: 13/02/2008 19:00:02 by Vcoolspice »
 

Offline Karen W.

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Thank you so much... for answering... I guess I don't want t wake  a hibbernating female polar bear!! Lol or any bear for that matter! Wonderful information thanks!
 

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