Some aspects of the Reproductive Biology of Barbus barbulus Heckel, 1847, from Karoon river, Iran

The present study was carried out from December 2007, during which to November 2008 more than 210 fish (Barbus barbulus) were caught and measured, including, 57 males, 64 females 89 immature fishes. Maximum minimum total lengths 885 mm respectively. weight 8460 g 99 length-weight relationship Y=0.00002 L2.90 (n=57, R2=0.85) for Y=0.000002 L3.22 (n=64, R2=0.87) Y=0.00005 L2.96 (n=210, R2 =0.90) fishes, these results showed isometric growth of the studied fish. mean value Gonado- Somatic Index (GSI) male female 1.58 ± 0.41 1.85 0.22 For both sexes, highest GSI in March lowest December. maturity stages indicated that spawning time April. size at first sexual (Lm) 380-430 males 470-520 females.