Search   in
between years and
Feeding habits of young-of-the-year greater amberjack Seriola dumerili (Risso, 1810) along the N/W Sicilian Coast
F. Badalamenti, G. D'Anna, L. Lopiano, D. Scilipoti and A. Mazzola

A survey was carried out from July to December 1992 in the Gulf of Castellammare (N/W Sicily) in order to study the feeding habits of juveniles of the greater amberjack Seriola dumerili. Stomach content analysis showed three different phases of predation during this period, depending on the size variation of the specimens. Cluster analysis suggested prey choice differed within three size groups. Class I (individuals up to 80 mm SL) feed mainly on the zooplankton community (Copepoda and Crustacea larvae). Class II(individuals ranging from 80 to 120 mm SL) represent a transition stage in which fish continue to feed on zooplankton, but benthic and nectonic items also become important. Class III (individuals greater than 120 SL mm) feed mainly on nectonic and nectobenthic items. Fish belonging to the size class II showed the highest value of niche breadth. The role of the Cymodocea nodosa system is stressed as an energy supply of invertebrate and vertebrate food items, especially to the size class II, in which fish shift from a planktivorous to apiscivorous diet. Further research is needed to understand better the feeding rhythm, food consumption and the role of benthic communities in the diet ofthis species.

Keywords: Serioladumerili, feeding habits, juveniles, Sicily.
Contents of this volume Sci. Mar. 59(3-4) : 317-323 Back PDF
Please, send comments to
ICM (CSIC) - Passeig Marítim de la Barceloneta, 37-49. E-08003 Barcelona (Spain)