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Thursday, November 17, 2011

91 whales stranded in Australia and New Zealand died over the Weekend - 16th Nov 2011

Rescuers have been unable to save the last surviving sperm whale from separate mass-strandings in Australia and New Zealand that have seen 91 whales die since the weekend.

Though whale strandings are relatively common in both countries, the past few days have been particularly tough for conservation authorities.

In all, 24 sperm whales and two minke whales died in a stranding on and around remote Ocean Beach in Tasmania. In an equally remote New Zealand location, the tip of Farewell Spit in the South Island, 65 pilot whales died.

Australian authorities were trying to guide the last surviving sperm whale to open water from Macquarie Harbour when the whale died late Wednesday. They had earlier managed to free two sperm whales from the harbor, which is located near Ocean Beach.

"We did everything possible to save this whale," said Liz Wren, a spokeswoman for the Tasmania Parks and Wildlife Service. She said the whale appeared to be swimming strongly before it died at about 7 p.m.

Paradoxically, mass-strandings in most cases appear to be triggered by the survival strategy of a single whale, said Anton van Helden, a marine mammal expert at New Zealand's Te Papa museum. When a whale is sick or injured, it will often seek shallower water to recover, he said, so it doesn't have to swim so far to reach the surface and breathe.

Unfortunately, he said, a sick whale will often become beached as it tries to recover. It will then send a distress signal to other whales in its pod and they will join it as part of the group's strong social cohesion.

"The key thing about life in the ocean is that whales are highly dependent on one another to deal with any ailment," van Helden said. Read More

Note: On the 4th of March 2011, 50 whales where stranded in Japan. Only 22 survived. 5 days following the beaching on the 9th of March a strong 7.2 Magnitude Earthquake struck Japan which was followed by the 9.1 magnitude just 2 days later on the 11th March 2011.

On the 21st Feb 2011, 107 Pilot whales died Southern tip of New Zealand's South Island, within hours a 6.1 Magnitude hit near Christchurch.