p. 125 - 131 DYNAMIQUE QUANTITATIVE DU MEROPLANCTON DANS LE MILIEU PORTUAIRE DE CONSTANTA (MER NOIRE) ET SON INFLUENCE SUR LA FORMATION DES SALISSURES Adriana Petran Institute Roumain de Recherches Marines Constanta Abstract The data concerning density of the Balanus nauplius larvae, Bivalvia veliger larvae and Polychaeta larvae, recorded between 1978-1980 in the Constanta harbour are presented in the paper. The author correlates the data with the quantity of the fouling organisms formed on the concrete plates immersed in the same place.