A fishing community in southern Brazil has an unusual ally: wild dolphins. Accounts of people and dolphins working together to hunt fish go back millennia, from the time of the Roman Empire near what is now southern France to 19th century Queensland, Australia. But while historians and storytellers have recounted the human point of view, it’s been impossible to confirm how the dolphins have benefited — or if they’ve been taken advantage of — before sonar and underwater microphones could track them underwater. In the seaside city of Laguna, scientists have, for the first time, used drones, underwater sound recordings and other tools to document how local people and dolphins coordinate actions and benefit from each other’s labor. The most successful humans and dolphins are skilled at ...
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