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vol.66 issue2MORPHOMETRY AND MERISTICS OF APLODACTYLUS PUNCTATUS VALENCIENNES 1832 (PISCES: APLODACTYLIDAE) CAPTURED BETWEEN IQUIQUE (20° 13' S) AND CONCEPCION (36° 47' S), CHILEONTOGENETIC VARIATION IN THE DIET OF PATAGONOTOTHEN LONGIPES (STEINDACHNER 1876) (PERCIFORMES: NOTOTHENIIDAE) IN THE FIORD OF CASTRO, CHILOE author indexsubject indexarticles search
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Gayana (Concepción)

Print version ISSN 0717-652XOn-line version ISSN 0717-6538

Abstract

MORENO, Mabel  and  FLORES, Héctor. STOMACH CONTENTS OF CHEILODACTYLUS VARIEGATUS  VALENCIENNES 1833, PINGUIPES CHILENSIS VALENCIENNES 1833 AND  PROLATILUS JUGULARIS VALENCIENNES 1833 IN HERRADURA BAY, COQUIMBO, DURING SPRING 2001. Gayana (Concepc.) [online]. 2002, vol.66, n.2, pp.213-217. ISSN 0717-652X.  http://dx.doi.org/10.4067/S0717-65382002000200017.

Stomach contents of tree important artisanal fishery species from the Herradura Bay in Coquimbo (IV Region, Chile), was studied: Cheilodactylus variegatus, Pinguipes chilensis and Prolatilus jugularis. 20 specimens of each species were captured between October and November of 2001. The numerical frecuency (FN), volume (FV) and occurrence (FO) of each prey-item was determined. This information was analyzed by IIR (relative importance index) and in order to determine the food niche overlap the Morisita index was used. Ch. variegatus and P. chilensis preferentially had a crustacean diet, based on Rhynchocinetes typus. P. jugularis preferes polychaets in its diet. The niche overlap between Ch. variegatus and P. chilensis was very high (0,85) while the lowest overlap was found between P. chilensis and P. jugularis (0,09)

Keywords : Morisita index; prey items; feeding niche.

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