the study deslocamentos do golfinho-nariz-de-garrafa (tursiops truncatus) no estado do rio de janeiro, sudeste do brasil (movements of the bottlenose dolphin, tursiops truncatus,  in the rio de janeiro state, southeastern brazil), by liliane lodi, leonardo liberali wedekin, marcos roberto rossi-santos, and milton césar marcondes, analyzes in more detail the presence and movements of dolphins along rio de janeiro's coast.

Presented by the sociedade de ecologia do brasil, the article CETÁCEOS NA REGIÃO DE BARRA DE GUARATIBA, RIO DE JANEIRO: EVIDÊNCIAS DE SAZONALIDADE (CETACEANS IN THE REGION OF Guaratiba, RIO DE JANEIRO : evidence of seasonality) examines the presence of whales in the guaratiba region throughout the year, accounting for the appearance of the Balaenoptera edeni, the Balaenoptera acutorostrata, the Stenella, the Megaptera novaeangliae, the Orcinus orca and the Sotalia guianensis, with most of the sighting happening in the summer months.