Marine mammals´ consumption by broadnose sevengill shark Notorynchus cepedianus in the northern and central Patagonian shelf

CRESPI-ABRIL, AUGUSTO C; GARCÍA NÉSTOR ANÍBAL; CRESPO ENRIQUE ALBERTO; COSCARELLA, MARIANO ALBERTO

THE LATIN AMERICAN JOURNAL OF AQUATIC MAMMALS

SOLAMAC

Lugar: Valparaiso; Año: 2003 vol. 2 p. 101 - 107

1676-7497

The study of food habits of the broadnose sevengill shark (Notorynchus cepedianus) based on the observation of thestomach contents of 22 individuals, revealed the importance of marine mammals as part of the shark?s diet. The analysisshowed that marine mammals represent at least 30% of the total consumed biomass by broadnose sevengill sharks. Thefrequency of occurrence was estimated to be 35%. The three pinnipeds with local distribution and at least two species ofcetaceans were consumed. Although consumption of marine mammal was high, there was no evidence of direct attack onliving preys by N. cepedianus, in Argentine waters