Effect of dietary supplemented biotronic top3 on growth indices, mucus and blood serum immunity and the expression of growth-related genes (GH, Ghrelin, IGF-1) in Persian sturgeon (Acipenser persicus)
The aim of this study was investigation of effects of biotronic top3 on some growth indices, mucus and serum immunity and expression of genes involved in growth of Persian sturgeon .240 fish (with an average weight of 104±1 g) were fed for 8 weeks under three experimental diets with different levels of biotronic top3, including: 2, 4 and 8 g / kg diet and a control group. At the end of the period, sampling was done randomly to evaluate the growth indices, mucosal and serum immunity as well as the expression of genes involved in growth.The results showed that the best growth performance and the highest expression of genes involved in growth (GH, IGF-1 and Ghrelin) were presented in the control group (P <0.05). The highest amount of alkaline phosphatase, total mucus protein and total serum protein and the lowest amount of serum alanine transaminase were presented in the treatment fed with diet containing 8 g biotronic top3 / kg of diet, which was significantly different from the control group (P <0.05). Diets containing biotronic top3 significantly increased and decreased serum lysozyme mucus and aspartate transaminase activity, respectively, which was significantly different from the control group (P <0.05). There was no significant difference in serum glucose and alkaline phosphatase levels in all treatments with the control group (P <0.05).Diet containing 8 g of biotronic top3 / kg diet, despite not having an effect on growth indices, improved the mucus and serum immunity parameters in Persian sturgeon .
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