From Arctic Focus: Study confirms what is already known: the Arctic polar bear is in trouble Focus reports on research into bear nuitrition in the Beaufort Sea (off of Alaska and Canada):
During April and May of 1985, 1986, 2005 and 2006 Cherry and his team used tranquilizer darts in order to immobilize the bear in order to measure the ratio of urea to creatine in their bloodstream. When an animal is fasting this ratio will be low, something that is normally only seen in male polar bears during the spring mating season. During the 1985 and 1986 studies showed the number of bears fasting was 9.6 and 10.5. In 2005 and 2006 this number had reached 21.4 and 29.3 percent, respectively.
I was watching Daily Planet and they said that some Polar bears have actually changed what they eat. They are eating some eggs of a bird which are high in protein, and they would only need about 40 eggs to get as much nutrients as a seal. Another good thing is that bird population needs population control as it has grown out of hand.
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