Encalhes de tubarões anequins e de raias-pretas no litoral do estado de São Paulo, sudeste do Brasil: Relato de casos

• Autor(a) principal: Garrone Neto, Domingos [UNESP]
• Data de Publicação: 2013
• Outros Autores: dos Santos, Rafael Silva, Maracini, Pryscilla, Caltabellotta, Fabio Prior [UNESP], Gadig, Otto Bismarck Fazzano [UNESP]
• Tipo de documento: Artigo
• Idioma: eng; por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/76644
• topic: Atlantic Ocean; Isurus oxyrinchus; Mortality; Pteroplatytrygon violacea; Stranded animals

Stranding of oceanic-pelagic elasmo branchs in the southeastern Brazil are reported. Data comes from animals observed in the coast of São Paulo state, between 1999 and 2012. Nine individuals of two species were recorded: Pteroplatytrygon violacea (n = 5; mostly during the winter) and Isurus oxyrinchus (n = 4; two in the winter and two in the summer). For P. violacea the strandings restricted to the austral winter suggest that the species follows the intrusion of high temperatures water masses recorded in southeastern Brazil during this season, bringing some individuals to shallow waters. For I. oxyrinchus is possible that individuals escaped from hooks of the commercial pelagic long line fishery and suffered injuries in the esophagus and in the gastric wall, stranding due to difficulties in locomotion and feeding. As these stranded sharks were not necropsied and only two animals were observed during the austral summer, we cannot exclude other causes of beaching such diseases or the intrusion of cold water masses in the continental shelf during this season.