Faunistic Of Survey of Fish Species of Seymare Dam in Ilam Province

In terms of critical climate, Iran is located in the exchange district of important animal geography, hence the fish fauna is diverse and interesting. The research identifies fish species at in Seymare River in Ilam province, dispersion of fishes and introducing native and exotic species. The study was performed in autumn and winter of 1393 and spring and summer of 1394. Fish sampling was seasonal, by electrofishing devices, hand and expectation nets in two stations at Seymare dam and a station on the Seymare River. Overall, were identified 14 species, belonging to 12 genera and 2 families of 2 orders of bony fishes. In terms of number of species, Cyprinidae family has the highest rate with 97.85 percent and Mastacembelidae family is ranked with 2.15 percent of the total species. Also Cyprinion macrostomum and Carassius gibelio had the most abundant, respectively 33.66 and 22.38 percent of the total number of samples, Luciobarbus esocinus and Luciobarbus kersin had the lowest incidence, each with a frequency of 0.33 percent. In the study areas, Cyprinidae family was highest distribution and among them Cyprinion mascrostomum was maximum distribution, Luciobarbus esocinus and Luciobarbus kersin were minimum distribution. In areas of study, a total of 12 species were native fish and 2 species (Ctenopharyngodon idella and Carassius gibelio) were exotic fish. In between stations, the stations 2 and 3 at Seymare dam were the most of frequencies and 1 station in Seymare River was lowest frequencies. Also, among the sampling stations, Seymare dam were the highest species diversity and Seymare River was the lowest number of species.