A survey on ectoparasite fauna of cold water fish farms in Mazandaran Province, Iran.

3 Abstract: The present study was carried out to survey on ectoparasite fauna of cold water fish farms in Mazandaran province (Iran). For this aim 500 samples were obtained from 50 fish farms and after arriving to the laboratory parasite examination started immediately. At the end of 12 month study on parasites. After parasitic examinations Ichthyophthirius multifillis, Trichodina sp., Chilodonella sp., Gyrodactylus sp. and Dactylogyrus sp. were detected. The highest infestation was related to Ichthyophthirius multifillis (16.40 %) that is member of protozoan ectoparasites and the lowest infestation was related to Chilodonella sp. (1 %).