p. 285 - 294 DONNEES PRELIMINAIRES SUR LES POPULATIONS DE MICROMYCETES DE LA ZONE DES EMBOUCHURES DU DANUBE Mucader Apas Institut Roumain de Recherches Marines Constanta Abstract During 1987, 72 samples of mycoplankton collected from five stations off the Danube Delta mouths, at 10, 20, 30, 40 m depth, have been analysed. The 32 identified taxa belonged to the classes Deeuteromycetes (orders:Hyphomi- cetes, Blastomycetes and Coelomycetes) and Phycomycetes (orders: Saprolegniales, Peronosporales and Mucorales). The species of the genera candida, Rhodotorula, Clados- porium and Penicillum evinced high productions of spores at all depths and in the three working periods, represen- ting dominant elements within fungal communities.