Effects of Different Dietary Vitamin E Levels on Growth Performance, Non-specific Immune Responses, and Disease Resistance against Vibrio anguillarum in Parrot Fish (Oplegnathus fasciatus)

Abstract

We report nutritional physiology and non-specific immune responses of vitamin E in parrot fish for the first time. This study aimed to investigate the essentiality and requirements in diets based on growth performances, non-specific immune responses and a challenge test against Vibrio angullarum. Six casein-gelatin based semi-purified diets were formulated to contain six graded levels of DL-α-tocopheryl acetate (α-TA) at 0, 25, 50, 75, 100 and 500 mg/kg diet (designated as E0, E25, E50, E75, E100 and E500, respectively) and fed to triplicate groups of juvenile parrot fish for 12 weeks. The analyzed dietary concentrations of vitamin E were 0, 38, 53, 87, 119 and 538 mg/kg diet for E0, E25, E50, E75, E100 and E500, respectively. At the end of the feeding trial, growth performance and feed utilization of fish fed the E25 were significantly higher compared to that of fish fed the other diets. Liver α-tocopherol concentration was significantly increased with an increase in dietary α-TA in a dose dependent manner. No apparent

The study of fillet proximate composition, growth performance and survival rate of striped catfish (Pangasius hypophthalmus) fed with diets containing different amounts of alpha-tocopherol (Vitamin-E)

“…The result were in agreement with the previous findings for Chinook salmon (Woodall et al 1964), channel catfish (Murai and Andrew 1974, Lovell et al 1984, Wilson et al 1984, Yildirim-Aksoy et al 2008, rainbow trout (Cowey et al 1983) and parrot fish (Galaz et al 2010). In the present study, no significant change in growth performance was observed in higher α-TA levels (300 mg/kg feed).…”

“…In the present study, no significant change in growth performance was observed in higher α-TA levels (300 mg/kg feed). The negative effects by a high dose of dietary α-TA have been reported with respect to growth performance in other fish species such as, parrot fish (Galaz et al, 2010), brook trout fry (Poston and Livingston, 1969), African catfish (Baker and Davies, 1996), and rainbow trout (Kiron et al 2004), red drum (Sciaenops ocellatus, Li et al 2008). In the present study the survival rate in case of T2 (Diet-2) and T3 (Diet-3) is higher than T1 (Diet-1).…”

Effects of dietary vitamin E and astaxanthin on growth, skin colour and antioxidative capacity of large yellow croaker Larimichthys crocea

“…Both vitamin E and carotenoid are lipid soluble and involved in the regulation of antioxidation, enhancing immunity and stress resistance (Galaz et al., ; Montero et al., ; Niu, Wen, et al., ; Wang et al., ). Adequate vitamin E and carotenoid in the diet can improve the growth performance of fish.…”

“…Vitamin E can serve as parts of a multicomponent antioxidative defence system, which protects the cell against the adverse effects of reactive oxygen and other free radical initiators of the oxidation of polyunsaturated membrane phospholipids, critical proteins or both (NRC, 2011). Meanwhile, vitamin E is also involved in the regulation of growth, immune response, disease resistance and reproductive fitness (Galaz, Kim, & Lee, ; Montero, Tort, Robaina, Vergara, & Izquierdo, ; Niu, Jia, Hu, Meng, & Lei, ; Palace & Werner, ). Moreover, vitamin E can affect the tissue lipid composition in fish (Lebold et al., ; Mourente, Bell, & Tocher, ; Tocher et al., ).…”

Protective effect of dietary vitamin E against fungicide copperoxychloride stress on Nile tilapia, Oreochromis niloticus (L.), fingerlings

“…These results are similar to those reported by, Kim et al (2003) who mentioned that Nile tilapia fed diet supplemented with 150 mg vit.E had significantly (P \ 0.05) higher growth performance than those fed the control diet. Also, Galaz et al (2010) noted that dietary inclusion of vit.E significantly influenced growth performance and feed utilization of the juvenile parrot fish (Oplegnathus fasciatus). Up to 38 mg vit.E/kg diet and beyond that level no further increase was observed.…”