Review on the knowledge about aquatic mammals of the north coast of Brazil

Abstract

The Brazilian north coast represents a new frontier in several fields of knowledge. The aquatic mammals of the Brazilian northern coast were poorly studied until recently. Recent efforts promoted by Projeto Piatam Oceano are changing the scenario. New research groups on aquatic mammals were formed and are conducting a large survey of this unique group of mammals. A total of 22 species of aquatic mammals were recorded along the Brazilian northern region. It should be emphasized the rediscovery of the Antillean manatee in several localities along the coasts of Amapá, Pará and Maranhão states. On the other hand, the estuarine dolphin is widely distributed along the Amazonian coast but is frequently by-caught in gill nets fisheries throughout the northern coast. The intense use of love charms has also a negative effect on these populations and should be better evaluated. An awareness program will be implemented as a first step for changing attitude towards the aquatic mammals of the northern coast.