p. 69 - 88 BASE TROPHIQUE ZOOPLANKTONIQUE ET SON IMPORTANCE POUR LA REPARTITION ET LA NUTRITION DU SPRAT DANS LES EAUX DEVANT LE LITTORAL ROUMAIN DE LA MER NOIRE Florica Porumb et I. Porumb Institut Roumain de Recherches Marines Constanta Abstract The estimation of total zooplankton quantity from the continental shelf waters up to 200 m depth, the correlation between spratt and zooplankton spreading as well as the trophic relations between these two constituents of the pelagial ecosystem are analysed.