p. 129-147 SUR LA BIOLOGIE DES COPEPODES PELAGIQUES DES EAUX ROUMAINES DE LA MER NOIRE Florica I. Porumb Institut Roumain de Recherches Marines - Constanta Abstract Based on the high amount of zooplankton collected over several years in the Black Sea water facing the Romanian littoral, at low depths, the author analysed the results of researches on certain biological aspects of the major Copepodae living there, namely: Acartia clausi, Giesbr., Pseudocalanus elongatum, Boeck, Centropages ponticus, caravaj. and Oithona nana, Giesbr. The paper also analyses the repro- duction rate and intensity, age structure of the population, sex ratio and Copepodae distribution in cross section, in keeping with the specific environment conditions, with season (spring and summer), and with Copepodae consumtion by various other organisms.