FEEDING HABITS OF THE ATLANTIC SPOTTED DOLPHIN, Stenella frontalis, IN SOUTHEASTERN BRAZIL

Autor(es)

Lopes, Xenia Moreira ^[1] ; de Oliveira Santos, Marcos Cesar ^[2] ; da Silva, Ednilson ^[2] ; Bassoi, Manuela ^[2] ; dos Santos, Roberta Aguiar ^[2]

Afiliação do(s) autor(es)

^[1] Inst Biociencias UNESP Rio Claro, Dept Zool, Lab Biol Conservacao Cetaceos, BR-13506900 Rio Claro, SP - Brazil

^[2] Ctr Pesquisa & Gestao Recursos Pesqueiros Litoral, Inst Chico Mendes Conservacao Biodiversidade, BR-88301700 Itajai, SC - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Oceanography; v. 60, n. 2, p. 189-198, APR-JUN 2012.
• Citações Web of Science: 7

Resumo

This study presents new information on the feeding habits of the Atlantic spotted dolphins, Stenella frontalis, in the Western South Atlantic. Nine stomach contents of S. frontalis incidentally caught in fishing operations conducted by the gillnet fleet based on main harbour of Cananeia (25 degrees 00' S; 47 degrees 55'W), southeastern Brazil, were analyzed. These specimens were captured between 2005 and 2007. A total of 1 422 cephalopod beaks, 147 otoliths and three crustaceans were recovered from the stomach contents. The dolphins assessed preyed on at least eight different fish species of the families Trichiuridae, Carangidae, Sparidae, Merluccidae, Engraulidae, Sciaenidae, Congridae and Scombridae, five cephalopod species of the families Loliginidae, Sepiolidae, Tremoctopodidae and Thysanoteuthidae, and one shrimp species of the Penaeidae family. Based on the analysis of the Index of Relative Importance (IRI), the Atlantic cutlassfish, Trichiurus lepturus, was the most important fish species represented. Of the cephalopods, the squid Doryteuthis plei was by far the most representative species. Several items were reported for the first time as prey of the S. frontalis: Xiphopenaeus kroyeri, Tremoctopus violaceus, Semirossia tenera, Merluccius hubbsi, Pagrus pagrus and Paralonchurus brasiliensis. S. frontalis presented teuthophagous and ichthyofagous feeding habits, with apparent predominance of the first, and preyed mainly on pelagic and demersal items. (AU)

• Processo FAPESP: 05/54149-9 - Parâmetros populacionais e aspectos ecológicos para a conservação do boto-cinza, Sotalia guianensis, no sul de São Paulo e no norte do Paraná
• Beneficiário: Marcos César de Oliveira Santos
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 08/55617-4 - Habitos alimentares do boto-cinza (sotalia guianensis) e de golfinhos do genero stenella da regiao sul do estado de sao paulo, brasil
• Beneficiário: Xênia Moreira Lopes
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica