Appearance of Humpback Whales in Brazil Increased 30 Times in 30 Years, Researchers Say
Animals pass by the Brazilian coast in the middle of the year, the breeding season of the species; Rio de Janeiro is one of the sighting points
Researchers from the Humpback Whale Project celebrated on the catamaran when they sighted, at the beginning of this month, a female humpback whale swimming with her calf in the sea of Rio de Janeiro. It was the second time they saw a calf on the coast of Rio.
The species spends the summer in the Antarctic region, but when temperatures drop there, in the middle of the year, they migrate in search of the warm waters of the Brazilian northeast to reproduce.
They seek Brazil, according to biologists, because they want the calves to learn their first movements in less cold seas. The journey of about 4,000 km can last up to two months.
Moreover, ocean water has become warmer due to the climate crisis, making it more difficult for animals to find places with the ideal temperature, 28°C.
During this breeding period, groups of competing males emit songs to please the female. According to the researchers' estimates, the calf identified in the Rio sea is carioca by birth.