The Effects of Dietary Selenium Nanoparticles (Nano-Se) in Comparison with Organic Selenium (Selemax) on Growth Performance in the Diet of Common carp, Cyprinus carpio

A 60-day growth trial was conducted the effects of selenium nanoparticle (Nano-Se) in comparison with organic selenium (Selemax) on growth performance of fingerlings of common carp (Cyprinus carpio) in aquaculture hall of university agricultural and natural resource, Sari. Carps with initial weight 8.60 ±0.05 gr were randomly stocked into 21 tanks (300 lit) with density of 40 fish so that three replicates were available for each of the six treatments and control. Nano-Se and Selemax were added to the semi-purified diets at levels 0, 0.5, 1.5 and 4.5 mg Se/kg. T-1, T-2, T-3, T-4, T-5 and T-6 were fed with diets containing 0.5 mgNano-Se/kg, 1.5 mgNano-Se/kg, 4.5mgNano-Se/kg, 0.5mgSelemax/kg, 1.5mgSelemax/kg and 4.5mgSelemax/kg, respectively. The control groups were fed basal diets without Se addition. Fingerlings about 3% of body weight fed with three daily meals and biometry was carried out every two weeks. Growth and survival factors were analyzed at the end of the trail period and results showed that the addition of Nano-Se and Selemax in the dietary treatments affected final weight, specific growth rate (SGR), weight gain percentage (%WG) and food conversion ratio (FCR). There were significant differences (P<0.05) in final weight, DWG, SGR, %WG and FCR of T-1, T-2 T-3, T-4, T-5 and T-6 compared with the control. The highest value final weight, SGR and %WG were observed in fish fed diets with 1.5 mg Se/kg diet, followed by 4.5 mg Se/kg, then 0.5 mg Se/kg, and lowest in fish fed the basal diet. Survival rate were not affected by the dietary treatments. Furthermore, the best growth performance was achieved in carps fed with level 1.5 mg Nano-Se/kg diet. Effect of selenium in nanoparticles form was more than organic form on the same level.