"Botos da Barra": the recognition of an ecosystem

This project aims to shed light on a singular interaction that takes place in the estuary of Tramandaí River, on the edge of the city and the water. This location, popularly known as “Barra”, is home to a group of dolphins of the Boto-de-Lahille species (Tursiops gephyreus), referred to as “botos” by the locals. When the river’s fresh water joins the salty water of the ocean, dolphins and fishermen connect and act together in a relation of mutual benefit called cooperative fishing. The proximity of a school of fish is easily detected by the dolphins, that proceed to corral them towards the margins, where it’s easier for the fishermen to catch them. In this approach, some fish are able to escape the fishermen’s nets, only to be captured and eaten by the dolphins. This phenomenon is one of a kind, occurring only in Tramandaí, in the state of Rio Grande do Sul, and in Laguna, state of Santa Catarina, both located in Brazil. This cooperation between species has been in place for generations as fishermen and dolphins have stablished a relationship of affection and acknowledgement while working together for sustenance. The environment also differs from the popular imagery of Brazilian beaches, considering that here the waters are calm, the wind blows smoothly, and the silence reigns over the dunes.