Lack of ice forces 35 000 walruses onto Alaska shore

2014-10-02 08:08
Some 35 000 walrus gather on shore near Point Lay, Alaska. (File, AP)

Some 35 000 walrus gather on shore near Point Lay, Alaska. (File, AP)

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Juneau - Fast-melting Arctic sea ice has forced at least 35 000 Pacific walruses to retreat to the Alaska shoreline, scientists from several federal agencies said on Wednesday.

Walruses are accomplished divers and frequently plunge hundreds of feet to the bottom of the continental shelf to feed. But they use sea ice as platforms to give birth, nurse their young and elude predators, and when it is scarce or non-existent they haul themselves up on land.

"One of the differences between this haul out and other ones is the sheer size and number of animals coming to shore," said US Geological Survey ecologist Chadwick Jay.

Such haul outs in areas of the Chukchi Sea, which polar bears also use as platforms for hunting, were first observed along Russia's coasts until Pacific walrus masses began appearing on Alaska's coastline in 2007, US scientists said.

Researchers monitoring these patterns estimate as many as 35 000 walruses came to shore near the coastal village of Point Lay, about 1 130km north of Anchorage at the weekend.

 The tusked beasts can be more than 3 metres long and weigh 1 225kg.

US Fish & Wildlife Service biologist Joel Garlich-Miller said the most pressing conservation concern with such a massive gathering is the possible mortality rate, caused largely by stampedes.

The ice dissipation was likely attributed to changes stemming from global climate change, Jay said.

The mass movement can be treacherous for younger walruses who can be trampled by a stampede triggered by aircraft or predators, such as grizzly bears and polar bears, Garlich-Miller said.

Fish and Wildlife estimates the Pacific walrus population as between 200 000 and 250 000 animals, though the exact number is unknown.

Read more on:    animals

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