p. 261 - 266 DYNAMIQUE DE L'ACTIVITE AMYLASIQUE CHEZ LA MOULE, PENDANT SON CYCLE BIOLOGIQUE ANNUEL Natalia Rosoiu Institut Roumain de Recherches Marines Constanta Abstract The monthly variation of the amylase activity from the hepatopancreas, mantle and whole body of Mytilus galloprovincialis Lmk., of sizes between 1-2 cm, 4-5 cm and 8-9 cm, was studied. A marked dynamic character, closely dependent on the annual biological cycle, was evinced by the monthly observations, with a maximum amylase activity in periods of spawing.