tehran times : Polar bears having fewer cubs due to global warming:
2/13/11
"...Polar bears numbers could plummet with climate change, according to a new study that showed females are giving birth to fewer cubs due to the loss of sea ice.
Researchers at the University of Alberta looked at how melting sea ice in the 1990s effected the breeding success of polar bears.
During the spring and summer months the females are hunting seals on the ice to build up energy for the autumn and winter when they will hibernate for up to eight months and give birth.
The study found the early melting of the ice made it more difficult for the bears to hunt seals successfully and build up energy."
Researchers at the University of Alberta looked at how melting sea ice in the 1990s effected the breeding success of polar bears.
During the spring and summer months the females are hunting seals on the ice to build up energy for the autumn and winter when they will hibernate for up to eight months and give birth.
The study found the early melting of the ice made it more difficult for the bears to hunt seals successfully and build up energy."
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