Killer whales are moving northward into Pacific Arctic, possibly spelling trouble for local mammals

Science | AAAS | 1/25/2019 | Staff
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Orcas aren’t necessarily new to the Chukchi Sea, which lies just north of the Bering Strait between Alaska and Russia. But the whales were only occasionally seen in the area and only for the warmest few weeks of late July and early August. That may be bad news for marine mammals in these areas, and climate change seems to be to blame.

In a new study in Marine Mammal Science, a researcher reports detecting acoustic recordings of the clicks and whistles of killer whales in the Chukchi Sea as early as 1 June, and as late as 16 November. The percentage of days when killer whale calls were detected in the southern Chukchi Sea—from September to November—also increased from about 10% in 2009 to about 30% in 2015.

Orcas - Trouble - Areas - Lots - Ice

Orcas normally have trouble migrating through areas with lots of ice...
(Excerpt) Read more at: Science | AAAS
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