SciELO - Scientific Electronic Library Online

vol.32 número1Variabilidad espacio-temporal de los eufáusidos frente a la costa de Concepción, ChileAbundancia estacional y distribución vertical del zooplancton gelatinoso carnívoro en una área de surgencia en el norte del Sistema de la Corriente de Humboldt índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Investigaciones marinas

versión On-line ISSN 0717-7178


MEDINA, Marianela; ARAYA, Miguel  y  VEGA, Claudio. Feeding and trophics relationships of coastal fish off northern Chile. Investig. mar. [online]. 2004, vol.32, n.1, pp.33-47. ISSN 0717-7178.

The feeding and trophic relationships of the fish species from the coastal zone of northern Chile were analyzed. The analysis was carried out considering the relative importance of the preys, diversity and inter-specific trophic superposition. A total of 632 individuals belonging to 16 species were collected through dive during the period between May 1998 and May 1999. Out of these, eight species were selected considering their highest frequency in the samples: Paralabrax humeralis, Hemilutjanus macrophthalmos, Cheilodactylus variegatus, Pinguipes chilensis, Anisotremus scapularis, Acanthistius pictus, Semicossyphus maculatus and Oplegnathus insignis. The results showed that the analyzed species are carnivorous with carcinophagous and ichthyophagous behaviors. This is more evident in P. humeralis and H. macrophthalmos, for which the principal prey was Rhynchocynetes typus. For the other ones the principal preys were gastropods mollusks, polychaetes and echinoderms. Except from S. maculatus and O. insignis most of the species showed a tendency to euriphagy. The trophic interactions showed a low dietary overlap with a 30% of similarity wich indicates that the species would have a trophic range that would allow them to be able to change their alimentary strategy avoiding competition for preys

Palabras clave : feeding; trophic relationships; coastal fishes; northern Chile.

        · resumen en Español     · texto en Español     · Español ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons