This study aimed at evaluating the interactive effects of dietary lipid, vitamin E and vitamin C on growth performance, feed efficiency, muscle composition and antioxidant enzyme activity of Litopenaeus vannamei for a period of 56 days. A total of 384 shrimp with an initial weight of 5.3 ± 1.1 g were stocked in 24 tanks. Eight experimental treatments were designed with two different levels of lipid (70 and 140 g kg⁻¹), VitC (0.5 and 1.0 g kg⁻¹) and VitE (0.1 and 0.3 g kg⁻¹). The results showed that high levels of dietary VitE and VitC improved the survival rate and the growth, feed and antioxidant indices in shrimp. The best shrimp growth performance was observed at 70 g kg⁻¹ of lipid, 1.0 g kg⁻¹ of VitC and 0.3 g kg⁻¹ of VitE. Dietary lipid levels had a significant effect on muscle lipid, moisture and VitE contents. Furthermore, the interaction between dietary lipid, VitC and VitE had a significant effect on VitC and VitE contents of muscle. The lowest T‐AOC, SOD, CAT and GPX activity was observed at 70, 1.0 and 0.3 g kg⁻¹ of dietary lipid, VitC and VitE respectively. The results also showed that the interaction of dietary VitE and VitC had a significant effect on growth and antioxidant enzyme activity of shrimp and improved their growth indices by reducing dietary lipid levels. Dietary lipid level of 70 g kg⁻¹, in interaction with 1.0 g kg⁻¹ VitC and 0.3 g kg⁻¹ VitE, resulted in better growth and antioxidant status in L. vannamei.

中文翻译：

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日粮脂质，维生素E和维生素C对白腿虾生长性能，饲料利用率，肌肉附近成分和抗氧化酶活性的相互作用

这项研究旨在评估日粮脂质，维生素E和维生素C对南美白对虾生长性能，饲料效率，肌肉组成和抗氧化酶活性的交互作用，持续56天。在24个水箱中放养了384只初始重量为5.3±1.1 g的虾。设计了八种实验处理，分别使用两种不同水平的脂质（70和140 g kg ^-1），VitC（0.5和1.0 g kg ^-1）和VitE（0.1和0.3 g kg ^-1）。结果表明，饮食中高水平的VitE和VitC可以提高虾的成活率以及其生长，饲料和抗氧化指标。在70 g kg ^-1的脂质，1.0 g kg的条件下，观察到了最佳的虾类生长性能VitC ^-1和0.3 g kg ^-1 VitE。饮食中的脂质水平对肌肉脂质，水分和VitE含量有显着影响。此外，饮食脂质，VitC和VitE之间的相互作用对肌肉的VitC和VitE含量也有显着影响。分别在70、1.0和0.3 g kg ^-1的饮食脂质，VitC和VitE上观察到最低的T-AOC，SOD，CAT和GPX活性。结果还表明，日粮中VitE和VitC的相互作用对虾的生长和抗氧化酶活性具有显着影响，并通过降低日粮中的脂质水平提高了虾的生长指数。膳食脂质水平为70 g kg ^-1，与1.0 g kg ^-1 VitC和0.3 g kg ^-1相互作用VitE导致南美白对虾的生长和抗氧化状态更好。