Volumen 42 - Número 3: 365-369 | 2007
Nota Científica

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Dieta de tiburones juveniles Prionace glauca (Linnaeus, 1758) (Carcharhiniformes: Carcharhinidae) en la zona litoral centro-sur de Chile 

M. Cecilia Pardo-Gandarillas^1*, Freddy Duarte², Javier Chong² y Christian M. Ibáñez¹

¹Instituto de Ecología y Biodiversidad, Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
²Departamento de Ecología Costera, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Casilla 297, Concepción, Chile

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Feeding studies of pelagic sharks in Chilean waters are rare because of the difficulty in accessing and collecting stomachs. This paper is the first contribution to the knowledge of the diet of juvenile P. glauca (Linnaeus, 1758), caught in the coastal zone of central-southern Chile. We described the diet of 13 juvenile P. glauca using frequency of occurrence, percent by number and weight quantitative indexes. The relationship between prey size and number and predator size was quantified with correlation analysis. Only 77% of stomachs had food contents. One hundred percent of stomachs contained Engraulis ringens and 60% had Dosidicus gigas. The relationship found between predator and prey size reinforces the hypothesis of positive relationships between predator and prey body size.

Key words: Blue shark, feeding, body size, Chile