Etude bioénergétique de six mollusques bivalves en baie de Saint-Brieuc

Laboratory experiments on physiological parameters, have been performed, in order to obtain the Scope For Growth, of six species of marine bivalves. Between March 1988 and April 1989, intertidal and subtidal individuals, collected in the Bay of SAINT-BRIEUC, have been submitted to the analysis. Among them, LAEVICARDIUM CRASSUM, ACANTHOCARDIA ECHINATA, TAPES RHOMBOIDES and CORBULA GIBBA, were collected in the subtidal area, and CERASTODERMA EDULE, TELLINA TENUIS on intertidal flats. Results show similar patterns for the first three species mentioned above, but they exibit large variability for the other species studied, due to some heterogeneity in their size, habitat and egestion rate. Results obtained from laboratory experiments have been generalised to in-situ populations and incorporated into a numerical model ot benthic fluxes, developed in the frame of the EUPHORBE program.