اثر رنگدانه ليكوپن بر عملكرد رشد، كارايي غذا و تركيبات بيوشيميايي بدن ميگوي رودخانه‌اي شرق (1849,Macrobrachium nipponense (De Haan

The effect of lycopene pigment on growth performance, feed efficiency and body composition of the Oriental River Prawn, Macrobrachium nipponense (De Haan, 1849)

مطالعه كنوني به منظور بررسي اثر سطوح مختلف رنگدانه ليكوپن بر روي شاخص‌هاي رشد، كارايي غذا و تركيبات بيوشيميايي بدن ميگوي رودخانه‌اي شرق (Macrobrachium nipponense) انجام گرفت. در اين پژوهش 225 قطعه ميگو با ميانگين وزن g 07/0±40/1 به‌ وسيله 5 تيمار غذايي شامل سطوح متفاوت ليكوپن صفر (شاهد)، 50، 100، 150 و mg/kg 200 ليكوپن جيره به مدت 8 هفته مورد غذادهي قرار گرفتند. در پايان دوره پرورش، ميگوها توسط ترازوي ديجيتال زيست‌سنجي شدند و تركيبات تقريبي بدن نمونه‌ها بر اساس روش AOAC مورد تجزيه قرار گرفت. يافته‌هاي حاصل نشان داد كه جيره‌هاي حاوي رنگدانه ليكوپن، اختلاف معني‌دار آماري را با تيمار شاهد از خود نشان دادند (05/0>p). درحالي‌كه شاخص هپاتوسوماتيك، تحت تاثير تيمارهاي متفاوت ليكوپن قرار نگرفت (05/0p) ولي خاكستر تيمارهاي آزمايشي، اختلاف معني‌داري با تيمار شاهد نداشت (05/0

The present research was conducted to investigate the effect of different levels of lycopene pigment on growth indices, feed efficiency and bio-chemical composition of Oriental river prawn (Macrobrachium nipponense). In this study, 225 prawns with mean weight of 1.40±0.07 gram were fed by 5 dietary treatments containing different levels of lycopene zero (control), 50, 100, 150 and 200 milligrams lycopene per kilogram diet for 8 weeks. At the end of culture period, prawns were biometry with a digital scale and approximate body composition of samples was analyzed according to the AOAC method. Results showed that the diets containing lycopene showed a significant difference with the control treatment (p<0.05). However, hepatosomatic index was not affected by different lycopene treatments (p>0.05). The highest weight gain, survival rate and lowest feed conversion ratio were observed in 150 milligrams lycopene per kilogram diet. Carcass moisture, protein and lipid were significantly different from control treatment (p<0.05) but the ash of experimental treatments had no significant difference with control treatment (p>0.05). The results of this study showed that increased levels of dietary lycopene improved the growth and nutritional indices of the Oriental river prawn and adding 200 milligrams per kilogram lycopene to the diet was suggested to improve the growth performance, feed efficiency and carcass quality of this prawn.