The effect of four iso-nitrogenous and iso-lipidic diets containing soy lecithin andlysolecithin with fish oil (sardine) and palm oil on growth, digestibility, and fatty acidcomposition of tail muscle and non-muscle portions of tiger shrimp,Penaeus monodon,wasevaluated. Shrimp fed with lysolecithin diets had significantly (P< 0.05) higher daily growthcoefficient values (1.40–1.45% day−1) than those fed with soylecithin containing diets (1.32–1.37% day−1). Correspondingly, lysolecithin-supplemented diets showed significantly higher(P< 0.05) apparent digestibility coefficients (ADC) of fatty acids with both the oils due tohigher emulsification ability of small micelle forming by lysolecithin. However, there were nosignificant differences in survival and FCR among all treatments. The fatty acid compositionof the test diets reflected to a certain extent in the fatty acid composition of the muscle and non-muscle portions of shrimp. Arachidonic, eicosapentaenoic, and docosahexaenoic acid contentsof muscle and non-muscle portions of shrimp were significantly (P< 0.05) higher inlysolecithin-supplemented diet compared to soylecithin-supplemented diet. The present resultssuggest that lysolecithin improved the fatty acid digestibility with its high emulsificationproperties that reflected in better performance by improving dietary value of palm oil.

EB00000003983K

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