عنوان مقاله [English]
This study aimed to investigate the effect of increasing the Lysine on growth, survival and body composition in juvenile of stellate sturgeon (Acipenser stellatus) during 8 weeks. A total of 144 fish with an initial average weight of 20.10±3.1 gram were randomly distributed in 12 tanks. Fish were fed diets containing 4 levels of Lysine (1%, 2%, 3% and control diet) twice daily with 4% of body weight. Growth and nutrition indices, including condition factor, body weight increasing, specific growth rate, food conversion ratio, food efficiency, visceral index and survival rate as well as carcass composition were evaluated. According to the results, there was a significant difference in growth parameters between the treatments (p < 0.05). The results showed the highest growth indices in the treatment containing 2% Lysine and the lowest in the treatment containing 3% Lysine. There was no significant difference in survival rate in all treatments. On the other hand, the results showed that the presence of Lysine in the diet reduced the ratio of protein and fat in the 2% treatment compared to the 3% treatment. Therefore, it can be stated that the addition of the 2 percent Lysine in the diet of stellate sturgeon juvenile will improve growth performance.