اثر لارو سوسک گوشت خوار (Tenebrio molitor) غنی شده با پروبیوتیک تجاری پروتکسین بر عملکرد رشد و رنگ پوست ماهی اسکار (Astronotus ocellatus)

Using live feed as nutritious feed sources that can also contain natural pigments; is always recommended to strengthen skin pigment, improve growth performance and increase the general health of ornamental fish. This study was conducted to evaluate the effect of different levels of mealworms (Tenebrio molitor) larvae enriched with commercial probiotic, Protexin on some growth factors, survival rate, and skin color of Oscar (Astronotus ocellatus). First, the mealworms larvae were fed with ۰ (control), ۰.۵, ۱, ۱.۵ and ۲% of a commercial Protexin probiotic along with wheat bran powder as the main feed resource for ۱۴ days. Then, Oscar fish with an average weight of ۳.۰ ± ۰.۲ g and an initial length of ۲.۲ ۳ ۰.۳ cm were randomly distributed into ۱۵ glass aquariums with a density of ۲۰ fish and were fed for ۵۶ days with the enriched mealworms larvae with Protexin. Based on the results, weight gain (۱۰.۵ ± ۰.۲۳ g), body weight gain (۷.۵۴ ±۰.۳۱ g), daily growth rate (۴.۵۶ ± ۰.۳۴), specific growth rate (۲.۱۱ ±۰.۱), and longitudinal growth (۳.۵ ± ۰.۵ cm) in ۲% treatment showed a significant difference compared to the control group and other treatments (P<۰.۰۵). The highest feed conversion ratio was obtained in control (۱.۲۵ ±۰.۱۷) and the lowest value was observed in ۲% treatment (۰.۸۴ ±۰۵). However, there was no significant difference in survival percentage between treatments receiving diets containing larvae enriched with probiotic, Protexin. The fish skin color according to L * and a * indices in the ۲% treatment had a significant decrease compared to other treatments, especially the control treatment (P<۰.۰۵). The effect of different levels of mealworms larvae enriched with commercial probiotic, especially at the level of ۲% feed on the growth indices and skin color of Oscar fish was evaluated as completely positive and significant.

کلیدواژه ها:

لارو سوسک گوشتخوار ، پروبیوتیک پروتکسین ، ماهی اسکار ، نرخ رشد ، رنگ پوست