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

Ligai Wang, Liqiao Chen, Jianguang Qin, Erchao Li, Na Yu, Zhenyu Du, Youqin Kong, Ji Qi

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    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 Eriocheir sinensis. The experimental diets included three levels of vitamin E (0, 100 and 300 mg kg-1) 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-1 was significantly lower than those fed 0 or 300 mg vitamin E kg-1. 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-1 can enhance immunity and antioxidant capacity of crab fed 6% or 9% dietary lipids.

    Original languageEnglish
    Pages (from-to)2544-2558
    Number of pages15
    JournalAquaculture Research
    Volume46
    Issue number10
    DOIs
    Publication statusE-pub ahead of print - 2015

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