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Trophic relationships between two gurnards Trigla lucerna and Aspitrigla obscura from the western Mediterranean

Published online by Cambridge University Press:  06 October 2009

M.S. Morte ,
M.J. Redon  and
A. Sanz-Brau
M.S. Morte
Affiliation:
Universitat de Valencia, Facultad de Ciencias Biológicas, Ecología, Laboratorio de Biología Marina, Dr Moliner 50, 46100 Burjasot (Valencia), Spain.
M.J. Redon
Affiliation:
Institute de Acuicultura de Torre de la Sal, 12500 Ribera de Cabanes (Castellón), Spain
A. Sanz-Brau
Affiliation:
Universitat de Valencia, Facultad de Ciencias Biológicas, Ecología, Laboratorio de Biología Marina, Dr Moliner 50, 46100 Burjasot (Valencia), Spain.
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Abstract

The feeding habits of Trigla lucerna L. (1758) and Aspitrigla obscura L. (1764) (Pisces: Triglidae), off the coast of the Gulf of Valencia (Spain), were investigated between October 1989 and January 1991. The two species examined in this study appear to have distinct feeding types, based on the species composition of prey and the frequency of occurrence of major food items. Tub gurnard had a more diverse diet and fed mainly on crustaceans (mysids and decapods), teleosts and molluscs, whilst long fin gurnard were less piscivorous and fed mainly on mysids and natantids. No significant differences were found in the annual variation of vacuity coefficient for either species. Diet composition in these species did not show great changes with either season and size of fish. There was little dietary overlap between these two species.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 77 , Issue 2 , May 1997 , pp. 527 - 537
Copyright
Copyright © Marine Biological Association of the United Kingdom 1997

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