India Joins Global Research on Dolphin–Fisher Mutualism:
The University of Kerala, in collaboration with international researchers, has launched a multi-year research project (2024–2028) to study the rare cooperative fishing behaviour (mutualism) between Indo-Pacific humpback dolphins and artisanal fishers in Ashtamudi Lake, Kerala.Indo-Pacific humpback dolphins (Sousa plumbea) signal dense fish shoals with tail-slaps or rolls, helping fishers cast nets at the right moment for maximum yield, while the scattered fish become easier for dolphins to catch.It is a long-term association between two species where both benefit—such as through food, protection, pollination, seed dispersal, or shelter.They are known for their distinct hump and elongated dorsal fin, inhabit shallow coastal waters across Australia, Africa, and Asia.The group comprises four species, with S. teuszii—and S. chinensis—listed under Appendix I and II of the Convention on the Conservation of Migratory Species of Wild Animals (CMS).It is listed as Endangered by IUCN.
