Sobre a alimentação do Tubarão-Martelo, Sphyrna zygaena (LINNAEUS, 1758), capturado por Espinhel Pelágico no Sudeste e Sul do Brasil

Abstract

The feeding diet of smooth hammerhead shark, Sphyrna zyganea, in oceanic waters off Southeastern and South Brazil was studied. The samplings was carried through the use of surface longlines during four cruises of the R.V. Soloncy Moura of IBAMA/CEPSUL, in the months of December, 2002 and March, April and July, 2003. The analysis of the diet was carried through calculating for each feeding item its numerical percentage (%N) in the stomachs, the percentage in weight (%P), and the frequency of occurrence (%FO), as well as the Index of Relative Importance (IRI). The feeding diet was based on Teleostei and Cephalopoda, mainly on the fi sh Aluterus sp., Balistes sp. and Diodon sp., and the squids Illex argentinus and Chiroteutis sp.