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- W4367319489 abstract "Macrobrachium acanthurus is a freshwater prawn with aquaculture potential. However, little is known about its nutrient requirements, particularly regarding protein and lipid-carbohydrate ratio interactions in the diet. To assess the effect of these macronutrients in growth performance and the activity of digestive and antioxidant enzymes, a 2 × 3 factorial design experiment was conducted using two different levels of protein (P35 and P40) and three lipid-carbohydrate ratios (L:C ratio): 2:1 (20 % L and 10 % C), 1:2 (10 % L and 20 %) and 1:6 (5 % L and 30 % C). Each diet was fed to triplicate groups of juveniles with an initial mean weight of 0.075 ± 0.015 g for 60 days. No significant differences in growth performance were found. Although treatment P35 LC 1:2 showed the highest values of weight gain and specific growth performance, survival rate in this diet was lowest among treatments. Interaction between protein and L:C ratio influenced trypsin, chymotrypsin, leucine aminopeptidase and amylase activities, but protein content alone affected the alkaline proteases. Lipase did not differ among treatments. Catalase, glutathione peroxidase, total antioxidant capacity, phenoloxidase and prophenoloxidase activities were also influenced by protein and lipid-carbohydrate interaction; however, super oxide dismutase activity was only affected by dietary protein level. The highest activities of phenoloxidase and prophenoloxidase were observed in prawns fed diet P40 and L:C ratio 1:6 which suggests oxidative stress. These results suggest that 35 % dietary protein and 10 % lipids and 20 % carbohydrates (L:C ratio 1:2) are optimal for growth performance and activity of digestive and antioxidant enzymes. However, measures should be taken to avoid cannibalism and increase the survival rate." @default.
- W4367319489 created "2023-04-29" @default.
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- W4367319489 date "2023-06-01" @default.
- W4367319489 modified "2023-10-01" @default.
- W4367319489 title "Effect of dietary protein, lipid and carbohydrate ratio on growth, digestive and antioxidant enzyme activity of prawn Macrobrachium acanthurus postlarvae" @default.
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- W4367319489 doi "https://doi.org/10.1016/j.aqrep.2023.101578" @default.
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