p. 85 - 118 EVOLUTION A LONG TERME DE LA PRODUCTIVITE SECONDAIRE DE L'ECOSYSTEME PELAGIQUE DE L'OUEST DE LA MER NOIRE Florica Porumb Institut Roumain de Recherches Marines Constanta Abstract On the basis of more than 1800 zooplankton samples collected in the waters of the Black Sea west area (0-100 m), between 1970-1984, the author analysis in the paper the quantitative distribution and some ecological aspects of the species from the zooplankton composition. The existence of high zooplankton quantities indicates eutrophic waters in the researched area.