Dolphins that help humans catch fish are more likely to survive

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Dolphins that help humans catch fish are more likely to survive
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Dolphins off coast of southern Brazil drive mullet towards the nets of local fishers and in return get some extra fish themselves

and humans in this area has existed for more than a century. Now, a long-term study has shown that the dolphins involved have a higher rate of survival than those that don’t work with people.

at Oregon State University, whose team has been studying the behaviour with underwater cameras and microphones for 12 years.Traditional cooperative fishing between bottlenose dolphins and artisanal net-casting fishers in Laguna, BrazilBetween May and August, dolphins drive migrating schools of mullet towards the coast, where fishers are waiting.

If the fishers drop their nets on the dolphins’ cue, they are 17 times more likely to catch mullet than if they do so at other times, Cantor’s team found.

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