The Study of the Fishes Fauna in Bidoaz River of Esfarayen
Subject Areas : Journal of Animal Biologyزهرا سلطانی 1 , احمد قارزی 2 , اتابک روحی 3
1 - دانشگاه لرستان، دانشکده علوم، گروه زیست شناسی، خرم آباد، ایران
2 - دانشگاه لرستان، دانشکده علوم، گروه زیست شناسی، خرم آباد، ایران
3 - دانشگاه تربیت معلم سبزوار، گروه زیست شناسی، سبزوار، ایران
Keywords: fish, sex ratio, fauna, Bidoaz River,
Abstract :
In this research, the fishes fauna of Bidoaz River was studied. This river is a permanent water source which flows in Northern Khorasan province. The total water-shed of this river covers an area of about 434 km2. During several field works, a total of 136 fish were sampled by appropriate tools and the collected specimens were transferred to the laboratory where then they were killed by ethanol injection to their brain. Afterwards, the morphologic, biometric and biomeristic characters of samples were examined any using the available keys they were taxonomically identified. In general, three species of fish all belonging to Cypriniformis, including Schizothorax pelzami, Capoeta fusca and Nemachilus malapteruruswere recognized. In addition, the sex ratio of these taxons were examined and a significant difference (Pandlt;0.05) was seen in terms of male/ female ratio
