Influence of dietary n3 LCPUFA on growth nutrit

Authors: Shiming Peng Yanfeng Yue Quanxin Gao Zhaohong Shi Fei Yin Jiangang Wang

Publish Date: 2014/07/11

Volume: 32, Issue: 5, Pages: 1000-1008

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Abstract

A 60day feeding experiment was conducted to investigate the influence of dietary omega3 longchain polyunsaturated fatty acids n3 LCPUFA on growth nutritional composition and immune function of marine fish Sebastiscus marmoratus Five diets containing 36 102 182 265 or 370 g/kg n3 LCPUFA were prepared The results reveal significant influences of dietary n3 LCPUFA on the final weight weight gain specific growth rate feed conversion ratio and condition factor As dietary n3 LCPUFA increased weight gain and specific growth rate increased and were significantly higher in groups fed 182 265 and 370 g/kg than in groups fed 36 and 102 g/kg P005 there was no significant difference between groups fed 182 265 or 370 g/kg P005 With increasing dietary n3 LCPUFA eicosapentaenoic acid and docosahexenoic acid content in muscle and liver increased significantly immunoglobulin class M content gradually increased from 91 to 148 μg/L and lysozyme activity content increased from 1 355 to 2 268 U/mL Broken line model analysis according to weight gain indicated that a dietary n3 LCPUFA level of 182 g/kg is essential for normal growth at a fat level of 125 g/kg Therefore appropriate dietary n3 LCPUFA not only promote growth and improve the n3 LCPUFA content but also enhance immune function in S marmoratusSupported by the National Key Technologies RD Program of China during the 12th FiveYear Plan Period No 2011BAD13B01 the National Natural Science Foundation of China No 31202009 and the Central Nonprofit Basic Scientific Research Project for the Scientific Research Institutes of China No East2011M09

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