mandag 24. januar 2011
POLAR BEARS DONT HIBERNATE
Hibernating means to pass the winter in a dormant or lethargic state. Animals that hibernate store body fat when food is plentiful. When food is scarce, they hibernate, living off their stored body fat.
Polar bears do not overwinter in dens like brown and black bears. Hibernation in the true sense of the word does not apply to polar bears.
Only pregnant females enter dens to give birth where they stay until the cubs are big enough to trek.
To build her den, the female scrapes a tunnel into the snow and digs two chambers, this technique is closely related to the igloos of the eskimoes, a shelter constructed out of snow to give protection from the snow, this is the ingenious part of it, turning a negative factor into a protective one.
Most polar bears remain active throughout the year.
They have the ability to reduce their metabolic rate when food is scarce and adjust it again when food is abundant.
Male and non-pregnant female polar bears do not hibernate, but can switch over to a "Walking Hibernation" when there is not enough food.
They slightly lower their body temperature and decreased heart and breathing rates.
This physiological act is unique to Polar Bears no other bear can do leaving the polarregion as a new Transilvania full of walking deads,
i.e. the zombie bears.
Since I have been gone for so long in a hibernating state its now time to get back in the game and do as the polar bear, lower my bodytemperature a little bit and start hunting in the streets of Grønland for scraps and hidden tales, so, now its on again.
All this talk about polar bears, hibernation and igloos leads me to my next point;
The climate outside this time of year is quite different then what it was when I started my Grønland project and I will use the next couple of days to examine the effects of snow, low temperature and the difference in tempo that applies to these seasonal changes in the cityscapes.