Polar bears losing weight as Arctic sea ice melts, Canadian study finds

Between 1984 and 2009 the weight of female bears in Ontario fell by over 10% while climate change meant they had 30 fewer days a year to hunt seal on ice

Three decades of melting sea ice has led to significant weight loss among the world's southernmost population of polar bears, new data from Canadian researchers suggests.

"It's a red flag," said Martyn Obbard, a scientist with the Ontario provincial government and co-author of a recently published study in the journal Arctic Science.