Prevalence and intensity of parasitic infection from (Leuciscus cephalus) and ( Capoeta capoeta gracilis) of the Neka River

A total of 200 specimen of two fish species from NekaRiver in the winter and summer, 2009 of two differnt stations were caught by castnet. The fishes were transported alive to laberatory of Islamic Azad University of Ghaemshahr. They killed by cutting their spinal cord and then measured and weighed. We found one protozoan species, Ichthyophthirius multifiliis on the branchia of Cacasian (Leuciscus cephalus) and Lenkoran (Capoeta capoeta gracilis). The isolated metazoan parasites are Dactylogyrus sp. and Diplozoon sp. from branchia, Gyrodactylus sp. from skin and the nematod Raphidascaris acus from intestine of the mentioned fishes. In this study, 39.58% of Cacasian and 45.19% of Lenkoran were infected with protozoan and metazoan parasites. Dactylogyrus sp. has the highest prevalence and intensity of parasitic infection of these fishes. According to the library investigations, Diplozoone sp. is recorded for the first time from cacasian, of  Iran.