Effects Of Dietary Antioxidants On Penaeus Vannamei Subjected To Vibrio And Salinity

The effects of dietary supplementation of vitamin E, vitamin C and Chinese herbal medicine on the growth and the enzymic antioxidant system of Penaeus vannamei subjected to vibrio and salinity were investigated. The growth rate, death rate, concentration of vitamin C and nicotinamide adenine dinucleotide (NAD), reactive oxygen species (mainly O2·) and free radical scavenging enzymes activity (superoxide distmutase, catalase and glutathione peroxidease included) were measured in experimental regimes as physiological indexes. The results were shown as below:The concentration of vitamin C and NAD in the hepapancreas of Penaeus vannamei is greatly increased with dietary supplementation of vitamin E and the capability to prevent reactive oxygen species toxicology and to protect the organism from oxidation damnification is highly improved; the concentration of vitamin C and NAD may be related through some kind of interaction about which little has been known, at present.The dietary vitamin E requirement of Penaeus vannamei is changed at different salinity. The request of dietary vitamin E for growth and development is satisfied while the dietary supplementation of vitamin E is 100mg/kg.The activity of antioxidant enzymes is effectively protected by dietary supplementation of vitamin E at 100mg/kg. The adaptability of Penaeus vannamei to salinity stress is improved and the activity of antioxidant enzymes is enhanced.No notable difference is observed on the activity of antioxidant enzymes at dietary supplementation of vitamin E of 100mg/kg and 600mg/kg.The growth rate of Penaeus vannamei is increased with the dietary supplementation of vitamin C, vitamin E and Chinese herbal medicine, but no notable difference is observed while compared to that of the control group. The death rate is greatly lowed and the antioxidant enzymes is highly activated and the resistance to Vibrio is greatly enhanced in the experiment system compared to the control system..