Growth performance, antioxidant status and immune response in darkbarbel catfish Pelteobagrus vachelli fed different PUFA/vitamin E dietary levels and exposed to high or low ammonia.

Ming Li, Liqiao Chen, Jianguang Qin, Erchao Li, Na Yu, Zhenyu Du

    Research output: Contribution to journalArticle

    55 Citations (Scopus)

    Abstract

    Triplicate groups of juvenile darkbarbel catfish (0.99. ±. 0.01. g) were fed three levels of linseed oil (2, 4 and 6%) rich in polyunsaturated fatty acids (PUFAs) and three levels of vitamin E (50, 200 and 400. mg/kg diet) for 60. days under two ammonia concentrations (0.01 and 5.70. mg/L total ammonia nitrogen, TA-N). Growth performance, immune response and pathogen resistance of fish were higher in fish under low ammonia conditions. Under high ammonia, fish fed 400. mg/kg vitamin E showed higher growth performance and immune response. Blood status and immune responses were improved in fish fed 6% linseed oil. However, fish fed 2% linseed oil or 400. mg/kg vitamin E showed a lower level of malondialdehyde regardless of ammonia levels. After 14. days infection of Edwardsiella ictaluri, cumulative mortality was lowest when fish were exposed to high ammonia and fed on 4-6% linseed oil. Fish fed 6% linseed oil or 400. mg/kg vitamin E yielded a higher level of antibody titer regardless of ammonia addition. This study indicates that the harmful effects of ammonia on fish can be mitigated when fish are fed on 2% linseed oil and 400. mg/kg vitamin E.

    Original languageEnglish
    Pages (from-to)18-27
    Number of pages10
    JournalAquaculture
    Volume406-407
    DOIs
    Publication statusPublished - 5 Aug 2013

    Keywords

    • Ammonia
    • Disease resistance
    • Immune
    • Linseed oil
    • Vitamin E

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