اثر سطوح مختلف سرخارگل تغذيه اي بر رشد و دفاع آنتي اكسيداني در ماهي استرلياد(Acipenserruthenus)نوجوان

اثر سطوح مختلف سرخارگل تغذيه اي بر رشد و دفاع آنتي اكسيداني در ماهي استرلياد(Acipenserruthenus)نوجوان

در اين پژوهش تاثير عملكرد گياه سرخارگل با نام علميEchinacea purpurea گياهي بر شاخص هاي رشد و ايمني در ماهي استرلياد (Acipenserruthenus) نوجوان مورد بررسي قرار گرفت. تعداد180قطعه ماهي استرلياد نوجوان با ميانگين وزن اوليه1±75 گرم انتخاب وپس ازسازگاري با محيط بصورت تصادفي در3 تانك كه توسط چارچوب كه به چهارقسمت مساوي تقسيم بندي شده بودند ذخيره شدند. گياه سرخارگل (EP) در 3 سطح 5/0 گرم در كيلوگرم (تيمار2)، 1(تيمار3) و 2 گرم در كيلوگرم (تيمار4) به جيره غذايي اضافه گرديد و جيره فاقد EP براي تغذيه گروه شاهد (تيمار1) مورد استفاده قرار گرفت. هر تيمار در 3 تكرار انجام گرفت. ماهيان روزانه به ميزان3% از وزن بدن موردتغذيه قرارگرفتند. درپايان56 روزتعداد 9عددماهي ازهرتيماربه صورت تصادفي انتخاب شده و پس از بيهوش شدن در محلول 2% 2فنوكسي اتانول خونگيري از ماهيان انجام گرفت. در پايان آزمايش، فاكتورهاي رشد و آنزيم هاي انتي اكسيدان در همه ي تيمارها مورد ارزيابي قرار گرفت. بر اساس نتايج به دست آمده مي توان بيان كرد كه افزودن عصاره گياه سرخارگل بر روي پارامترهاي رشد و آنزيم هاي دخيل در دفاع آنتي اكسيداني فاقد اثر مي باشد.

The effect of different levels of canola meal on growth indices, body composition and survival rate of white leg shrimp (average weight 1.63 ± 0.09 gr) was studied. The experiment was according to completely random design with five dietary treatments (0, 5, 15, 25 and 35 percent of canola meal) in triplicate groups. Four hundred and fifty shrimp were randomly distributed between 15 tanks of 300 L capacity (30 shrimp per tank). Shrimps were fed three times a day according to their body weight at a temperature of 31 ± 0.09 °C for 8 weeks. After 8 weeks of feeding, growth and nutritional indices such as weight gain (WG), specific growth rate (SGR), protein efficiency ratio (PER), feed efficiency (FE), average daily weight gain (ADG), percent of body weight increase (BWI), percent of protein production (PPV) survival rate, price index were measured. Results showed that replacing canola meal by fishmeal in the diet of white leg shrimp have not any negative impact on shrimp growth performances up to 25 percent. There is no significant differences were observed in body composition and survival rate between treatments. Results of this study showed that fish meal can be replaced by canola meal up to 25 % and reliable price index in the diet of juveniles shrimp.The effect of different levels of canola meal on growth indices, body composition and survival rate of white leg shrimp (average weight 1.63 ± 0.09 gr) was studied. The experiment was according to completely random design with five dietary treatments (0, 5, 15, 25 and 35 percent of canola meal) in triplicate groups. Four hundred and fifty shrimp were randomly distributed between 15 tanks of 300 L capacity (30 shrimp per tank). Shrimps were fed three times a day according to their body weight at a temperature of 31 ± 0.09 °C for 8 weeks. After 8 weeks of feeding, growth and nutritional indices such as weight gain (WG), specific growth rate (SGR), protein efficiency ratio (PER), feed efficiency (FE), average daily weight gain (ADG), percent of body weight increase (BWI), percent of protein production (PPV) survival rate, price index were measured. Results showed that replacing canola meal by fishmeal in the diet of white leg shrimp have not any negative impact on shrimp growth performances up to 25 percent. There is no significant differences were observed in body composition and survival rate between treatments. Results of this study showed that fish meal can be replaced by canola meal up to 25 % and reliable price index in the diet of juveniles shrimp.