Polar bear population struggles as Arctic sea ice melts
Almaty. February 10. Kazakhstan Today - A new study has claimed the polar bear population is decreasing as the Arctic sea ice is melting, Kazakhstan Today reports.
The survival of the species across much of the Arctic will be in question if climate change continues at its current rate, said researchers from the University of Alberta, The Australian reported.
They predicted that up to 73 percent of pregnant females in the Hudson Bay region will not reproduce if sea ice breakup comes a month early.
"If climate change continues unabated, the viability of the species across much of the Arctic will be in question," said biologist Peter Molner, the paper's lead author.
During ice-free periods, pregnant female bears are less able to hunt for food to build up energy reserves, as they hibernate before giving birth. If they cannot build up proper reserves, the embryo is reabsorbed.
In the early 1990s, 28 percent of food-deprived pregnant females failed to reproduce, but this proportion is expected to increase rapidly during coming decades, according to the study, published in the journal Nature Communications.
The Hudson Bay polar bears are the most southerly population and the first to be affected by global warming, said researchers, but if temperatures continue to rise across the Arctic, most of the polar bear population will be at risk.
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