Highly unsaturated fatty acid requirements of Penaeus monodon postlarvae: an experimental approach based on Artemia enrichment
1997
Rees, J.F., Chulalongkorn Univ., Bangkok (Thailand). Aquatic Resources Research Inst. Sichang Marine Science Research and Training Station
Peanaeus monodon postlarvae (PL-5 to PL-15) were fed 5 different diets consisting of enriched Artemia nauplii with a specific n-3 HUFA content. Although the postlarvae grew well on an Artemia diet with low HUFA-content, the ability of PL-10 to endure osmotic stress remained low. Feeding Artemia enriched with medium levels of n-3 HUFA (sum n-3 HUFA = 12.55 mg/g DW) for 5 days considerably enhanced the resistance of PL-10 to osmotic stress and their survival recorded 5 days later. However, very high dietary levels of n-3 HUFA (31.2 mg/g DW) did not have any growth-promoting effect, thus suggesting that and excessive supply of n-3 may not be beneficial to the shrimp. Our data demonstrate that subjecting postlarvae to reduced salinities for 2 h provides a simple and rapid test for assaying the physiological condition of postlarval shrimp.
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