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Cetaceans, such as the dolphin Sotalia guianensis (gray dolphin), are marine animals whose populations have been decreasing due to human impacts on their environments. Thus, verifying the knowledge about the species and its protection areas is important to adopt new measures if the species is preserved. For this, the occurrence of the gray dolphin in federal conservation units was verified by the ICMBio electronic address and a bibliographic review of the environmental data of the species along the Brazilian coast was carried out. Twenty-one conservation units were identified with land and marine areas that have records for the species, of which 15 are sustainable use conservation units. Regarding ecological data, the species was found mostly in shallow waters (less than 10 meters), with average water temperature ranging from 21.9 to 24.2o. In some areas, it was observed that the dolphin uses larger areas in different seasons, and its frequency in relation to seasonality also varies among the studied locations. Still, relationships with precipitation and tide were identified. Despite presenting different responses to the variables, studies indicate that the behavior of the populations of Sotalia guianensis can be explained by the distribution of their prey, which also vary along the Brazilian coast.

Revisão das Informações do Boto-Cinza (Sotalia guinensis) na Costa Brasileira