عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The present study was conducted to determine fish species diversity in Aharchay River and Sattarkhan barrier (East Azerbaijan province) during autumn to summer, 2007-2008. Twelve sampling places were choosen. Samples were fixed in 10 % formalin solution and transported to laboratory for biometrical analyses. Total frequencies of species during each season were as follow: autumn 31.7 %, winter 19.6 %, spring 20.5 %, and summer 28.2 %. Eight species were identified that belonged to 3 families including: Cyprinidae (with 6 species), Cobitidae (1 species) and Percidae (1 species), and their relative frequencies were 78.1 %, 21.5% and 0.4 %, respectively. It was found that the Capoeta capoeta, was the predominant species of Aharchay river with relative frequency of 33.2 %.