Effects of dietary vitamin E on growth performance, antioxidant capacity and lipid metabolism of juvenile golden pompano Trachinotus ovatus

In order to investigate the dietary requirement of Trachinotus ovatus for vitamin E (VE) and its effects on tissue polyunsaturated fatty acids (PUFA) reservation, a 56‐day feeding trial was performed with five diets (D1–D5) supplemented with different levels of VE at 34.56, 47.35, 61.16, 91.06 and 144.88 mg VE/kg diet. A total of 375 fish (initial weight 13.40 ± 0.08 g) were randomly distributed equally into 15 sea cages and each diet in triplicate cages. After 8 weeks of feeding, fish fed diet D3 exhibited significantly higher weight gain (WG), serum superoxide dismutase and glutathione peroxidase activities and also had higher docosahexaenoic acid (DHA) and n‐3 PUFA contents in the raw muscle than those of fish fed diets D1 and D5 (p