Occurance and intensity of metazoan parasites from pike (Esox lucius, L.) and roach (Rutilus rutilus caspicus, J.) in bodjagh wetland of Kiashahr

Bodjagh wetland, which is about 80 hectare, is one of the conserved and important wetlands in Guilan. No study was done to identify fish parasites in this important wetland yet. This study was conducted in order to identify the parasites of two commercial important fishes (pike & roach) of this wetland. Parasite infection of  36 specimens of roach (Rutilus rutilus caspicus) and 39 specimens of pike (Esox lusius) were caught in Bodjagh wetland in the years 2004-2005 by drift net, sein net and cast net were studied. The fish were transported to the laboratory alive and their skin, muscles, digestion tract, gills and eyes were studied carefully by microscope and stereoscope. According to the  results, 6  species  of parasites  recognized  in the both fishes ,  including: Raphidascaris acus, Diplostomum spathaceum and Tetraonchus monenteron in pike (Esox lusius) and  Caryophyllaceous fimbriceps, Diplostomum spathaceum,  Piscicola sp. And Lernaea sp. in roach (Rutilus rutilus caspicus). Three species of C. fimbriceps, Piscicola sp. and Lernaea sp. are reported in roacth for the first time in Iran. Totally the amount of affliction to parasites in roach was more than pike. Both of the fishes had parasites in digestion tract, gill and eye. The parasites in digestion tract and gill were different. The most occurrences of parasites were related to Diplostomum spathaceum because of the living habitat of these fishes (wetland).