عنوان مقاله [English]
This research aimed at studying the effect of stocking density on growth indices and performance, survivability rate of common carp fingerlings in 9 fiberglass tanks (1.85×1.85×0.3 m) in around 1 m3 of water for an 8 week. The research was carried out by stocking 9000 pieces with average body weight of 1±0.1 g in 3 treatments and 3 replications in a completely randomized design with different densities 500, 1000, 1500 pieces/m2 in three treatments A, B and C respectively. The results showed that stocking density had a significant effect on growth indices at final weight (FW), final length (FL), growth rate (GR), specific growth rate (SGR) and survivability rate (SR). Significant differences were observed across treatments (p < 0.05). The highest GR and SGR, SR and the lowest FCR were observed in Treatment A. In this study it was found fish concentration had the least effect on growth indices and survivability rate of farmed fish fries. Thus, in order to develop fish farming, it is suggested that a concentration of 500 pieces /m2 forcommon carp fries be used in fiberglass tanks.