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Australian rescuers race to save stranded pilot whales

Australian rescuers race to save stranded pilot whales

Friday, September 23, 2022, 15:45 GMT+7
Australian rescuers race to save stranded pilot whales
Fewer than 10 of the pilot whales are still alive on Ocean Beach, in remote western Tasmania. Photo: AFP

Australian rescuers battled Friday to refloat the last surviving pilot whales from a mass stranding that killed nearly 200 of the animals on a beach in Tasmania.

Fewer than 10 of the shiny black mammals were still alive on Ocean Beach, in remote western Tasmania, state wildlife services said.

About 30 of the animals were released into the ocean on Thursday, but some had beached themselves again, said Brendon Clark, incident controller with the Tasmania Parks and Wildlife Service.

Under drizzle, marine wildlife experts began wrapping up a days-long rescue operation that started after a large pod of the animals, which are part of the dolphin family, stranded on the beach.

Three pilot whales had yet to be reached because of their remote location on the shore and the difficult tidal conditions, Clark told reporters at the scene.

"The priority still is the rescue and release of those remaining animals and any others that we identify that re-strand," he said.

Next, Clark said, comes the task of disposing of the carcases.

Wildlife workers used a fork-lift truck to drag whale carcasses along the beach, lining them up with tails pointed to the frigid ocean.

Scientists still do not fully understand why mass strandings occur. Photo: AFP
Scientists still do not fully understand why mass strandings occur. Photo: AFP

Carcasses

One small, young calf could be seen tied up alongside the larger adult pilot whales.

A long white line was looped around the tails of dozens of the animals to allow them to be towed en masse to disposal at sea.

Weather forecasts indicated the "best opportunity" for the operation would be on Sunday, Clark said.

If left in shallow waters or on the beach, the carcasses could attract sharks and can carry disease.

Workers at Tasmanian marine farming company Petuna Aquaculture helped to release surviving whales into the sea.

"It's extremely sad to see these beautiful, intelligent animals on land where they are not to be," Depha Miedecke, general manager of strategy at Petuna, told AFP.

"We will see it right through to the end to also removing, unfortunately, the whales that have not made it."

Distress signals

Two years ago, Macquarie Harbour was the scene of the country's largest-ever mass stranding, involving almost 500 pilot whales.

More than 300 pilot whales died during that event, despite the efforts of dozens of volunteers who toiled for days in Tasmania's freezing waters to free them.

Scientists still do not fully understand why mass strandings occur.

Some have suggested pods go off track after feeding too close to shore.

Pilot whales -- which can grow to more than six metres (20 feet) long -- are also highly sociable, so they may follow pod-mates who stray into danger.

That sometimes occurs when old, sick or injured animals swim ashore and other pod members follow, trying to respond to the trapped whale's distress signals.

Others believe gently sloping beaches like those found in Tasmania confuse the whales' sonar, making them think they are in open waters.

The latest stranding came days after a dozen young male sperm whales were reported dead in a separate mass stranding on King Island -- between Tasmania and the Australian mainland.

State officials said that incident may have been a case of "misadventure".

Strandings are also common in nearby New Zealand.

There, around 300 animals beach themselves annually, according to official figures, and it is not unusual for groups of between 20 and 50 pilot whales to run aground.

But numbers can run into the hundreds when a "super pod" is involved.

In 2017, there was a mass stranding of almost 700 pilot whales.

AFP

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