Why are so many whales dying in the Western Atlantic Ocean?

Humpback Whale

Mass Die-Off of Whales in Atlantic Is Being Investigated
By TATIANA SCHLOSSBERG
​APRIL 27, 2017
The New York Times

Humpback whales have been dying in extraordinary numbers along the Eastern Seaboard since the beginning of last year. Marine biologists have a term for it — an “unusual mortality event” — but they have no firm idea why it is happening.

Forty-one whales have died in the past 15 months along the Atlantic coast from North Carolina to Maine. In a news conference on Thursday, officials from the National Oceanic and Atmospheric Administration Fisheries said that they had not identified the underlying reason for the mass death, but that 10 of the whales are known to have been killed by collisions with ships.

The agency is starting a broad inquiry into the deaths.
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These whales “have evidence of blunt force trauma, or large propeller cuts,” said Deborah Fauquier, a veterinary medical officer at the agency’s Office of Protected Resources. These collisions with ships were “acute events,” Dr. Fauquier said, and were being treated as the “proximate cause of death.”
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Dr. Fauquier said that the number of whale strandings was “alarming,” and that she hoped the investigation might give a sense of what kind of threat this presents to this population of humpback whales and those around the world.

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