Effects of dietary vitamin E on growth performance and body composition of snubnose pompano Trachinotus blochii (Lacépède, 1801)
Abstract
This study was conducted to evaluate the effect of vitamin E on growth, survival, hepatosomatic index (HSI), viscerosomatic index (VSI) and body composition of snubnose pompano Trachinotus blochii juvenile for 10 weeks. Fish with an average length of about 6,31 cm and a weight of about 4,7 g were randomly arranged into 18 composite tanks of 200 L. The experiment included 5 treatments supplemented with vitamin E (100, 200, 400, 800 and 1.600 mg/kg diet) and 1 treatment without vitamin E (control). Each treatment was repeated 3 times. The results showed that vitamin E supplementation effected on growth parameters (LG, WG, SGRL, SGRW), liver index and body composition of fish. The growth rate of fish, HSI and crude protein, crude lipid contents in whole body increased gradually with the levels of vitamin E supplementation and reached the highest value in the 400 mg/kg treatment, the lowest in the control treatment (P < 0,05). There was no differences about these parameters when supplementing with vitamin E at higher levels (800 and 1.600 mg/kg). The survival rate and visceral index of fish did not difference when supplementing or not supplementing with vitamin E. From this study, it can be seen that the vitamin E content of 400 mg/kg is suitable for growth performance, improve liver index and flesh quality of pompano juvenile.
