A recent study has found that critically endangered North Atlantic right whales are feeding closer to the ocean’s surface at night, increasing their risk of being struck by boats.

The study, published earlier this month in the peer-reviewed journal PLOS One, documented nighttime surface feeding in North Atlantic right whales, providing new evidence that could be used to prevent deadly collisions between the whales and vessels.

The paper’s lead author, Jay Kirkham, a PhD student at Dalhousie University in Halifax, said the research team worked with U.S.-based non-profit Ocean Alliance to tag 23 right whales in the Shediac Valley, an underwater…

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