Dr. Murai Éva szerk.: Parasitologia Hungarica 18. (Budapest, 1985)

Parasit, hung. 18. 1985 Monogenean parasites from fishes of the Nile in Egypt Dr. Kálmán MOLNÁR —Dr. Ismail MOSSALAM Veterinary Medical Research Institute, Hungarian Academy of Sciences, Budapest, Hungary — Faculty of Veterinary Medicine, University of Zagazig, Zagazig, Egypt "Monogenean parasites from fishes of the Nile in Egypt" - Molnár, K. - Mossalam, I. - Parasit, hung., _18: 5-9. 1985. ABSTRACT. Four species of Monogenea were found on the gills of Nile fishes in Egypt. Detailed redescription of Jainus nur sei (Ergens, 1973) found on Alestes dentex and Quadriacanthus clariadis Paperna, 1961 from Clarias lazera are given. Data on the incidence and short descriptions of two Gyrodactylus spp. from the latter fish species are also given. KEY WORDS. Monogenea, Fishes, Quadriacanthus, Jainus, Gyrodactylus, Egypt (Nile). Until recently little attention has been paid to Monogenea living in African fishes. The majority of the species have been described from Ghana and Uganda (PAPERNA, 1965, 1968a, 1968b, 1969, 1973 and PAPERNA and THURSTON, 1968, 1969a, 1969b). Studies on fish monogeneans in Egypt have been carried out by FISCHTHAL and KUNTZ (1963) and ERGENS (1973a, 1973b, 1981). The present paper reports the occurrence of four monogenean species in Nile fishes in Egypt. MATERIALS AND METHODS Examinations were made in February and March, 1984 on fishes collected by seine from Bahr Mouis, a branch of the Nile near Zagazig. Forty-two specimens of five fish species were examined (Çlaji_as_lazera 10; AT^es^esjdentex 1; Tilagia_nilotica_20; T. _galilaea 8; T. zielli 3). A complete parasitological examination was performed. The fish were examined under stereomicroscope immediately after extermination. Monogeneans collected from the fish were preserved as slide preparations in ammonium picrate solution under cover slip. GUSSEV's (1983) methods were used for measuring the sclerotised elements. Drawings and measurements were made with the aid of camera lucida. Measurements are presented in micrometers unless otherwise stated, with mean followed by range in parentheses. RESULTS No monogenean infection was found in Tilapia spp. The following parasites were found in Cla1.13-1 Jäzera and Aleste^dentex^ Jainus nursei (Ergens, 1973) - (Fig. 1). syn. : Characidotrema nursei Ergens, 1973 Host: A^e^tes_d_entex Locality: Bahr Mouis near Zagazig.