Effects of Two Dietary Lipid Sources at Two Levels on the Survival, Growth and Fatty Acid Composition of the Giant Freshwater Prawn, Macrobrachium rosenbergii

Young Chul kim, Nicholas Romano, Chaiw Yee Teoh, Wing-Keong Ng

Abstract


A 10 week feeding trial was conducted to investigate dietary crude palm oil (CPO) or squid liver oil (SLO), at 3.5% (low) or 9.5% (high) as a 2 × 2 factorial design on survival, growth and whole body fatty acid composition of the giant freshwater prawn, Macrobrachium rosenbergii.  Growth performance was lowest and highest for prawns fed the CPO-low and SLO-high diets, respectively.  While prawns fed the CPO-high diet had lower growth than those fed the SLO-low diet, no significant differences were detected.  Significant interactions were found for oleic acid, arachidonic acid, n-6 polyunsaturated fatty acids (PUFA) and n-3/n-6 PUFA, while long chain PUFA, eicosapentaenoic acid and docosahexaenoic acid of the prawns were significantly lower when fed the CPO-based diets.  Lower growth of M. rosenbergii fed the CPO-based diets may be related to less favorable fatty acid ratios and/ or lowered digestibility but higher dietary CPO can help mitigate this. 


Keywords


Macrobrachium rosenbergii; fatty acids; interaction; lipid replacement

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