Sentences with phrase «most polar bear populations»

As late April is the peak of this critical spring feeding period for most polar bear populations, this is when sea ice conditions are also critical.

The New York Times has come up with a new defense against so - called climate denialists who happen to point out that most polar bear populations are steady or increasing amidst climate change: The ice hasn't disappeared as fast as we said it would.

Not exact matches

The Arctic Refuge's coastal plain provides the most important land denning habitat for the Beaufort Sea polar bear population.

The truth is that we clearly do not know enough about most of the polar bear populations to make the argument for listing.

Polar bears are one of the most sensitive Arctic marine mammals to climate warming because they spend most of their lives on sea ice.35 Declining sea ice in northern Alaska is associated with smaller bears, probably because of less successful hunting of seals, which are themselves ice - dependent and so are projected to decline with diminishing ice and snow cover.36, 37,38,39 Although bears can give birth to cubs on sea ice, increasing numbers of female bears now come ashore in Alaska in the summer and fall40 and den on land.41 In Hudson Bay, Canada, the most studied population in the Arctic, sea ice is now absent for three weeks longer than just a few decades ago, resulting in less body fat, reduced survival of both the youngest and oldest bears, 42 and a population now estimated to be in decline43 and projected to be in jeopardy.44 Similar polar bear population declines are projected for the Beaufort Sea region.45

This is Fig. 8 from Lunn et al. (2013), the most recent report on the estimated size of the Western Hudson Bay polar bear population.

Most female polar bears in the Beaufort Sea breed for the first time at 5 years of age, compared to 4 years of age in most other populations, and cubs normally remain with their mothers for 2.5 years prior to weanMost female polar bears in the Beaufort Sea breed for the first time at 5 years of age, compared to 4 years of age in most other populations, and cubs normally remain with their mothers for 2.5 years prior to weanmost other populations, and cubs normally remain with their mothers for 2.5 years prior to weaning.