Corresponding author Study of parasites in skin and Gill of(Schizothorax zarudnyi) in Sistan regio

This study was conducted in sistan region from March till August 2010. In this study 60 fish cultured Schizothorax zarudnyi of pond zahak Reseaech center and 40 fish catching stations Chahnimeh Reservoir, back zahak Dam, Poozak Hamoon, saboory hamoon.Fish is after catching transported to zahak Research center Laboratory as alive, after Laboratory studing, recognized their parasites by creditable rcognition key. determine physical and chemical factor stations and pond such as, temperature, dissolved oxygen, pH, total dissolved solid.According to results 5 species and Genus of parasites recognized, including: two crustacae(Argulus.sp), (Learnaea.sp). and three protozoa (Ichthyophthirus multifilius) ,(Tricodina.sp),(Chilodonella.sp). Highest Percent abundant was in pond (90)percent and lake(47/5) percent relate to Lernea and highest mean intensity in pond(459) and lake(6) relate to Ichthyophthiriusmultifilius.this is the first report of the Argulus, Chilidonella parasites infecting in Schizothorax zarudnyi.