Zooplankton fauna of Cernek lake (Samsun)

Cernek lake is one of the most important lakes of Kizilirmak delta that also recognized as a Ramsar Site. During 1996, in zooplakton collected monthly, 10 cladocerans, 3 copepods and 18 rotifers, totally 31 species, have been identified. Of identified species, Diaphanosoma lacustris, Daphnia longispina, Moina micrura, Pleuroxus aduncus, Alona rectangula, Leydigia leydigi, Acanthocyclops robustus and all Rotifera species are first records for Cernek lake. Determined species have been compared with previously studies. It is obvious that lake has given important losses in zooplankton diversity by depending on eutrophication.