Effect of dietary lipids and vitamin E on growth performance, body composition, anti‐oxidative ability and resistance to Aeromonas hydrophila challenge of juvenile Chinese mitten crab Eriocheir sinensis. (4th April 2014)

• Record Type: Journal Article
• Authors: Wang, Ligai; Chen, Liqiao; Qin, Jianguang; Li, Erchao; Yu, Na; Du, Zhenyu; Kong, Youqin; Qi, Ji
• Is Part Of: Aquaculture research. Volume 46:Number 10(2015)
• Page Start: 2544
• Page End: 2558
• Publication Date: 2014-04-04
• Subjects: Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.12416
• Languages: English
• ISSNs: 1355-557X

Abstract

<abstract abstract-type="main" id="are12416-abs-0001"> <title>Abstract</title> <p>Vitamin E supplement is important in protecting lipid oxidation and enhancing immunity of aquatic animals. A 10‐week feeding trial was conducted to evaluate the effect of dietary lipid and vitamin E on juvenile Chinese mitten crab <italic>Eriocheir sinensis</italic>. The experimental diets included three levels of vitamin E (0, 100 and 300 mg kg<sup>−1</sup>) and two levels of lipid (6% and 9%). The 9% lipid diet significantly enhanced the body lipid of crabs compared with the 6% lipid diet. The vitamin E concentration of hepatopancreas increased with the increase in vitamin E in the diets regardless of dietary lipid levels. The hepatopancreas fatty acids, especially polyunsaturated fatty acid and highly unsaturated fatty acid, were significantly enhanced by vitamin E supplement or 9% dietary lipid. Vitamin E supplement significantly increased the total antioxidant capacity, superoxide dismutase, lysozyme and phenoloxidase activities of crabs compared with those fed the diets without vitamin E supplement. The hepatopancreas malondialdehyde of crabs fed 100 mg vitamin E kg<sup>−1</sup> was significantly lower than those fed 0 or 300 mg vitamin E kg<sup>−1</sup>. The phenoloxidase activity of crabs fed the 9% lipid diet was significantly higher than those fed 6% lipid, irrespective of vitamin E levels. Vitamin E supplementation increased the bacterial resistance of juvenile crab. This study indicates that dietary lipid and vitamin E supplement do not affect crab growth and survival, but vitatmin E supplement at 100 mg kg<sup>−1</sup> can enhance immunity and antioxidant capacity of crab fed 6% or 9% dietary lipids.</p> </abstract>