author(s)
Ali Reza Radkhah, Soheil Eagderi, Hadi Asadi

abstract
This study includes the Length-weight Relationship and Fulton’s Condition Factor of five species from the Caspian Sea basin. A total of 161 specimens were collected from the Anzali wetland and Talar River of the Caspian Sea basin in autumn, 2015 using electrofishing device. The specimens were ranged 4.55-23.04 cm in total length and 0.50-39.87 g in total weight. Based on the results, the values of ‘b’ ranged between 2.68 (C. auratus) and 3.14 (S. cephalus) with a average of 2.91 and the r2 values greater than 0.93 showing a highly significant relationship. The results revealed that the growth type of S. cephalus and H. leucisculus were positive allometry (b>3), and those of B. cyri, C. gracilis and C. auratus negative allometry (b<3). In the present study, the condition factor was found to be between 0.078±0.042 (Mean ± SD) to 1.041±0.112 (Mean ± SD). It was highest in H. leucisculus in and lowest for C. gracilis (0.078). This study provided some basic information of five studied species for fishery biologists in Iran.