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Information Journal Paper

Title

THE STUDY OF THE FISHES FAUNA IN BIDOAZ RIVER OF ESFARAYEN

Pages

  47-56

Abstract

 In this research, the FISH FAUNA of the 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 malapterurus were recognized. In addition, the SEX RATIO of these taxons were examined and a significant difference (P<0.05) was seen in terms of male/female ratio.

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