A new study suggests those melancholy tunes sung by humpback whales may really be a sign of loneliness.
Rescuers managed to successfully release an entangled humpback whale off the coast of Texada Island in western Canada. Scientists who tracked humpback whales in Australia noticed that fewer whales wailed to find mates as their population grew.
As whale numbers dramatically rebounded following the end of commercial whaling — one of the world’s great conservation success stories — she noticed something unexpected."It was getting more difficult to actually find singers," said Dunlop, who is based at the University of Queensland in Brisbane. "When there were fewer of them, there was a lot of singing — now that there are lots of them, no need to be singing so much.
Eastern Australia’s humpback whales were facing regional extinction in the 1960s, with only around 200 whales left. But numbers grew and reached 27,000 whales by 2015 — approaching estimated pre-whaling levels.As the density of whales increased, their courtship changed.
"As animal populations recover, they change their behavior — they have different constraints," said marine biologist Boris Worm of Canada's Dalhousie University, who was not involved in the study.
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