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Why whales in Alaska have been so happy
Key Excerpts from Article on Website of BBC News


BBC News, August 5, 2021
Posted: September 6th, 2021
https://www.bbc.com/news/world-us-canada-58032702

During a normal summer, Glacier Bay and the surrounding area buzzes with traffic, as vessels of all sizes, from massive, 150,000-tonne cruise liners to smaller whale-watching boats, ply the waters as part of Southern Alaska's massive tourism industry. The Covid-19 pandemic brought all of that to a sudden halt. Overall marine traffic in Glacier Bay declined roughly 40%. According to research by [Christine] Gabriele and Cornell University researcher Michelle Fournet, the level of manmade sound in Glacier Bay last year dropped sharply from 2018 levels, particularly at the lower frequencies generated by the massive cruise ship engines. Peak sound levels were down nearly half. All this afforded researchers an unprecedented opportunity to study whale behaviour in the kind of quiet environment that hasn't existed in the area for more than century. Gabriele has already noted changes. She compared whale activity in pre-pandemic times to human behaviour in a crowded bar. They talk louder, they stay closer together, and they keep the conversation simple. Now, the humpbacks seem to be spreading out across larger swathes of the bay. Whales can hear each other over about 2.3km (1.4 miles), compared with pre-pandemic distances closer to 200m (650ft). That has allowed mothers to leave their calves to play while they swim out to feed. Some have been observed taking naps. And whale songs - the ghostly whoops and pops by which the creatures communicate - have become more varied.

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