Scientia Marina, Vol 63, No 1 (1999)

Growth of the dusky grouper Epinephelus marginatus (Linnnaeus, 1758) (Teleostei, Serranidae), in the Natural Marine Reserve of Lavezzi Islands, Corsica, France


https://doi.org/10.3989/scimar.1999.63n171

J. L. Bouchereau
Laboratoire d’Hydrobiologie Marine et Continentale, UMR-CNRS 5556, Université Montpellier II, France

P. Body
Laboratoire d’Hydrobiologie Marine et Continentale, UMR-CNRS 5556, Université Montpellier II, France

C. Chauvet
Laboratoire d’Etude des Ressources Vivantes et de l’Environnement Marin, Université Française du Pacifique, France

Abstract


The growth of Epinephelus marginatus living in the Natural Marine Reserve of the Lavezzi Islands was studied using the von Bertalanffy model. The growth parameters of this model were: L?=135.9 cm, K=0.08, t0=-0.80 years. The relationship between length and weight was W=12.5 10-2 TL2.60. Grouper lengths were similar in the Lavezzi Islands and in North Tunisia. The relative abundance of trophic resources in the Lavezzi Islands, due to a positive reserve effect and enhanced by a small population density of groupers, has great consequences on growth, compensating the effect of lower water temperature. A plausible explanation for the similarity between these two populations is that they belong to a single metapopulation.

Keywords


Serranidae; Epinephelus marginatus; growth; Mediterranean Sea; marine reserve; Corsica

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