عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In this survay that was conducted from July 1388 in 6 months, to identify fish species composition and their abundance in Gamasiab river of the Kermanshah Province and study of effect of industrial pollutions on dispersion of species, monthly sampling had been done on the fishes by cast net in 3 stations. Studied stations were determined from up to down of the river, respectively: station 1 was in upside of the river nearness Samangan-e-sofla village, station 2 in Chehr bridge region and station 3 was in Sorkheh-deh region. In this project, to catch the samples only used from cast net with 1.5 cm meshes. According to the results of studying on the 486 fish speciments, 25 species of 5 families were identified: Minnows (Cyprinidae), River Loaches (Balitoridae), Catfishes (Sisoridae), Catfishes (Bagridae) and Spiny eels (Mastacembelidae) which had 20, 2, 1, 1 and 1 species in the studied region, respectively. Among identified families, Cyprinidae were the dominant fishes in whole of region and after that were Balitoridae. Also the results showed that the minimum caught species were in station 2 or near the source of polluting of the river and the maximum species found in station 3 or far from the source of pollution. In the other hand, industrial pollution and the waste of factories were effected on the dispersion of fishes and due to decrease the diversity of them and distance of the pollution due to increase the diversity of fishes.