Killer whale pod trapped in drift ice off the coast of Japan vanishes

A pod of more than a dozen killer whales has gone missing after languishing in Japan's icy waters for nearly a day, trying to escape being trapped in an ice floe. It is unknown what happened to them, but they may have died.

Fishermen near Hokkaido first noticed the pods struggling in the thick mud early Tuesday morning. Images and drone video show at least 12 orcas. Several boys struggle in a small space It was trapped in heavy ice about 1 km offshore.

As of Wednesday morning, The containment area was empty.Japanese news outlet NHK said it gave hope that the animals may have escaped to the open waters of the Sea of ​​Okhotsk.

However, late Tuesday afternoon, a pod of 17 orcas was found trapped on an ice floe 2 kilometers northeast of their original location. NHK reporting.

“Orcas are not ice-adapted whales. They are not comfortable in this area.” colin galloway at the University of Manitoba, Canada. “So they are definitely experiencing the stress of confinement and are more likely to be starving.”

Cetaceans that permanently inhabit the Arctic region, such as narwhals (Monodon Monoceros) and belugas (Delphinapterus leucas), can sometimes become trapped in ice. Killer whale (killer whale) However, they usually avoid heavy ice and avoid getting trapped.

Still, black-and-white marine mammals can end up in icy waters at the wrong time.in 2016 reviewScientists found that since 1840, there have been 17 incidents in the Northern Hemisphere where a total of 100 orcas were trapped in ice. Almost half of them occurred in the Sea of ​​Okhotsk, Japan. Confinement usually ends in the killer whale's death, Galloway said.

Scientists believe that even the reported orcas “broken freedomAfter being trapped in the ice, they can die struggling through further ice drifts while trying to reach the open sea.

A 2019 study of ice-trapped killer whales suggests that: Mammals can live on body fat for up to 50 days before being trapped and starving to death.. Sightings of orcas trapped in the ice have increased in recent years, as the Arctic ice melts and curious orcas seek new territory to explore.

Global warming may indeed be playing a role, Galloway says. His team is currently investigating the environmental impact of killer whales' gradual northward migration. But it's also possible that entrapment incidents simply appear to be more common because people are reporting more incidents.

“Just because we've gotten better at detecting, observing, and recording climate warming, and we're more interested in it, it's very difficult to disentangle the relationship between climate warming.” “That's one of the predictions,” he says.