477 whales die in 'heartbreaking' New Zealand strandings
Yesterday
WELLINGTON, New Zealand (AP) — Some 477 pilot whales have died after stranding themselves on two remote New Zealand beaches over recent days, officials say.
None of the stranded whales could be refloated and all either died naturally or were euthanized in a “heartbreaking” loss, said Daren Grover, the general manager of Project Jonah, a nonprofit group which helps rescue whales.
The whales beached themselves on the Chatham Islands, which are home to about 600 people and located about 800 kilometers (500 miles) east of New Zealand's main islands.
The Department of Conservation said 232 whales stranded themselves Friday at Tupuangi Beach and another 245 at Waihere Bay on Monday.
The deaths come two weeks after about 200 pilot whales died in Australia after stranding themselves on a remote Tasmanian beach.
“These events are tough, challenging situations,” the Department of Conservation wrote in a Facebook post. “Although they are natural occurrences, they are still sad and difficult for those helping.”
Grover said the remote location and presence of sharks in the surrounding waters meant they couldn't mobilize volunteers to try to refloat the whales as they have in past stranding events.
“We do not actively refloat whales on the Chatham Islands due to the risk of shark attack to humans and the whales themselves, so euthanasia was the kindest option,” said Dave Lundquist, a technical marine advisor for the conservation department.
Mass strandings of pilot whales are reasonably common in New Zealand, especially during the summer months. Scientists don't know exactly what causes the whales to strand, although it appears their location systems can get confused by gently sloping sandy beaches.
Grover said there is a lot of food for the whales around the Chatham Islands, and as they swim closer to land, they would quickly find themselves going from very deep to shallow water.
“They rely on their echolocation and yet it doesn't tell them that they are running out of water,” Grover said. “They come closer and closer to shore and become disoriented. The tide can then drop from below them and before they know it, they're stranded on the beach.”
Because of the remote location of the beaches, the whale carcasses won't be buried or towed out to sea, as is often the case, but instead will be left to decompose, Grover said.
“Nature is a great recycler and all the energy stored within the bodies of all the whales will be returned to nature quite quickly,” he said.
Nick Perry, The Associated Press
Yesterday
WELLINGTON, New Zealand (AP) — Some 477 pilot whales have died after stranding themselves on two remote New Zealand beaches over recent days, officials say.
None of the stranded whales could be refloated and all either died naturally or were euthanized in a “heartbreaking” loss, said Daren Grover, the general manager of Project Jonah, a nonprofit group which helps rescue whales.
The whales beached themselves on the Chatham Islands, which are home to about 600 people and located about 800 kilometers (500 miles) east of New Zealand's main islands.
The Department of Conservation said 232 whales stranded themselves Friday at Tupuangi Beach and another 245 at Waihere Bay on Monday.
The deaths come two weeks after about 200 pilot whales died in Australia after stranding themselves on a remote Tasmanian beach.
“These events are tough, challenging situations,” the Department of Conservation wrote in a Facebook post. “Although they are natural occurrences, they are still sad and difficult for those helping.”
Grover said the remote location and presence of sharks in the surrounding waters meant they couldn't mobilize volunteers to try to refloat the whales as they have in past stranding events.
“We do not actively refloat whales on the Chatham Islands due to the risk of shark attack to humans and the whales themselves, so euthanasia was the kindest option,” said Dave Lundquist, a technical marine advisor for the conservation department.
Mass strandings of pilot whales are reasonably common in New Zealand, especially during the summer months. Scientists don't know exactly what causes the whales to strand, although it appears their location systems can get confused by gently sloping sandy beaches.
Grover said there is a lot of food for the whales around the Chatham Islands, and as they swim closer to land, they would quickly find themselves going from very deep to shallow water.
“They rely on their echolocation and yet it doesn't tell them that they are running out of water,” Grover said. “They come closer and closer to shore and become disoriented. The tide can then drop from below them and before they know it, they're stranded on the beach.”
Because of the remote location of the beaches, the whale carcasses won't be buried or towed out to sea, as is often the case, but instead will be left to decompose, Grover said.
“Nature is a great recycler and all the energy stored within the bodies of all the whales will be returned to nature quite quickly,” he said.
Nick Perry, The Associated Press
Robyn White - Yesterday- NEWSWEEK
Hundreds more whales have washed up in another mystery mass stranding on a New Zealand island, known to be surrounded by large numbers of sharks.
A picture shows another mass stranding that occurred in Tasmania, Australia in September. Pilot whales are particularly prone to stranding.© GLENN NICHOLLS/Getty
Up to 250 pilot whales could have been involved in the stranding that occurred in the Chatham Islands, on Pitt Island, according to stranded whale rescue organization Project Jonah.
The stranding comes shortly after another mass stranding occurred to the northwest of Chatham Island, where 215 pilot whales passed away. It takes the number of stranded whales in the area to 500, all within a few days.
Cetacean strandings—when marine mammals wash up on beaches—happen globally. The phenomenon is common, although scientists do not know why they occur.
Occasionally, we see mass strandings, where a huge number of cetaceans strand at once. Pilot whales are among the species most affected by this phenomenon, along with other types of dolphin.
According to the Department of Conservation, the Chatham Islands are a "stranding hot spot" for whales, with nearly half of the whale strandings in New Zealand occur here.
It is not yet clear how many whales survived the latest incident, but it is likely some will be euthanized. This is due to the remoteness of the area.
"This is an incredibly isolated and remote part of the world, with a small population and known for great white sharks, which pose risk to both people and whales," Project Jonah said on a Facebook post.
Wildlife officials have been sent to the area to initiate rescue efforts. Project Jonah said it will post updates when they become available.
"Whale strandings remain a mystery. We don't exactly know why whales and dolphins do this," Wildlife scientist Vanessa Pirotta of the Marine Predator Research Group at Macquarie University, told Newsweek.
"Several factors might be at play here, e.g. mis-navigation, spooked by something, following a sick leader. There might be many more reasons.
"Pilot whales are social and can be found in large pods at times. Unfortunately, the clock starts ticking when a whale/dolphin strands, the longer they are out of water, the less chance they have at being released. Even if released, there's always a chance they might re-strand," Pirotta said.
Scientists have noticed that certain coastal areas are more prone to mass strandings than others. It is not clear why, but experts have previously suspected that pods can become disorientated in these areas.
Culum Brown, professor at the School of Natural Sciences at Macquarie University told Newsweek that pilot whales appear to be drawn into specific locations that "probably lots of food available."
But then, they are caught out by shifting tides.
"Mass strandings often happen at the same location multiple times, often years apart which strongly suggests they are attracted to these locations for a reason. Once they are stranded they can get re-stranded when they are freed," Brown said.
"This happens because the stranded animals attract the rest of the pod. If the pod is not willing to leave the area because their mates are stuck, that puts the rest of the pod in danger of stranding as well. It's a kind of negative feedback loop."
Brown said pilot whales strong social bonds can be at their disadvantage in this scenario.
"Pilot whales are often found in pods consisting of hundreds of individuals and big pods can also merge to become super-pods. The social bonds are very strong and while this works to their advantage in some contexts, its a big problem in the context of stranding," Brown said.
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