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Determination of the Requirement of Larval Striped Jack for Eicosapentaenoic Acid and Docosahexaenoic Acid Using Enriched <i>Artemia</i> Nauplii

1996; Springer Science+Business Media; Volume: 62; Issue: 5 Linguagem: Inglês

10.2331/fishsci.62.760

1444-2906

Toshio Takeuchi, Reiji Masuda, Yasuro Ishizaki, Takeshi Watanabe, Masaei Kanematsu, Keinosuke Imaizumi, Katsumi Tsukamoto,

Fatty Acid Research and Health

Two experiments were conducted to decide the requirement of larval striped jack Pseudocaranx dentex for eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) by feeding Artemia nauplii containing different levels of EPA and/or DHA for 11 or 12 days. Fish fed oleic acid (OA) enriched Artemia containing a low amount of n-3 highly unsaturated fatty acids (n-3HUFA, mainly EPA and DHA) showed low growth and survival rate, and poor vitality (survival rate at activity test). Elevation of DHA levels in the nauplii improved survival, growth, and vitality. However poor vitality was observed even though fish fed EPA enriched Artemia. Fatty acid compositions of polar lipid in fish body clearly reflected the composition of nauplii. In healthy fish with strong vitality, the ratio of 18:1/22:6 n-3 in body polar lipids remained below 1. This ratio could be an appropriate index for EFA status of larval striped jack. The requirement of larval striped jack for DHA during the Artemia feeding periodis estimated to be 1.6-2.2% in Artemia. (dry basis) based on larval vitality. On the other hand, fish fed EPA enriched Artemia containing more than 3.1% EPA does not improve neither vitality nor survival.