بررسي آثار سطوح مختلف پروتيين بر شاخصهاي رشد ميگوي آب شيرين رودخانه اي شرق در مرحله جواني Macrobrachium snipponese (De Haan, 1849)

The Effects of Different Levels of Protein on Growth indices of Juvenile Oriental River Prawn Macro brachium nipponese (De Haan 1849)

For commercial production of The oriental river prawn within a short period under control conditions, knowledge of macro-nutrients, especially protein, is essential. Because there is limited information regarding nutrient requirements of the river prawn, hence an experiment of 8 weeks duration was conducted in order to find out the optimum level of protein. Four treatments with levels of 20, 25, 30 and 35 percent with isocaloric digestible energy (DE2800 kcal/kg/diet) were formulated. Each treatment was conducted in triplicate. Three hundred and sixty (360) juvenile prawn (of size 1.4±0.4g) were randomly distributed between 12 fiberglass tanks of 500 liter capacity. The juvenile shrimps were fed at 10% of body weight four times daily (at 9, 12, 15 and 18 hrs). Nutritional responses in terms of weight gain (WG), survival rate (SR), food conversion ratio (FCR), specific growth rate (SGR) and protein efficiency ratio (PER) improved in treatments 3 and 4 (with 25 and 30% protein level) and showed significantly different with other treatments (P<0.05). The treatment one (1) with lowest protein level showed lack of improvement in all growth factors and significant improvement (P<0.05) with the other treatments. The composition of the body carcasses, like protein, lipid mineral and moisture, showed no improvement in treatment 1 and a significantly different with other treatments(P<0.05); but treatments 2, 3 and 4 they did not show noticeable significant differences in body carcassesʹ composition (P>0.05). In general, the treatment 3 with 30% protein level was shown to be the most reliable one.