Inventaire et abondance relative des gasteropodes dans les zones marines cotieres de Monastir (est-tunisien)

Abstract

The present study constitutes a first attempt to the knowledge of the Gastropods in three eastern Tunisian zones off Monastir governorate (Sayada, Tboulba and Elbkalta). Samples were taken in the area from May to June 2006 using a Van Veen grab. In total, 23 stations with a depth ranged between 5 and 20 meters were prospected. After treatment of the samples, 29 species of Gastropods are identified. Results from the present study showed a pre-dominance of the two species Tricolia speciosa and Smaragdia viridis. However, we noticed the rarefaction of Bivalves and the absence of commercial species in the prospected area, such as the clam Ruditapes decussatus and the banded murex Hexaplex trunculus.