油脂添加水平对罗氏沼虾生长性能、血液生化指标及体组织脂肪酸组成的影响

Effects of Dietary Oil Supplementation Level on Growth Performance, Biochemical Indices in Blood and Fatty Acid Composition in Body Tissues of Macrobrachium rosenbergii

配制3种油脂添加量分别为0％（Ⅰ）、3％（Ⅱ）、6％（Ⅲ）日粮，研究日粮不同脂肪水平对罗氏沼虾生长、血液生化指标和体组织成分的影响。选取体质量为1克左右的健康罗氏沼虾幼虾600尾，随机分为3组，每组4个重复，每个重复50尾虾，饲养于1M3聚乙烯网箱中。试验期为60天。结果表明：Ⅱ组罗氏沼虾增重率显著高于Ⅰ组（P〈0．05），与Ⅲ组无显著差异（P〉0．05）；随着油脂添加量的增加全虾和肌肉中粗脂肪含量显著增加（P〈0．05）；肌肉C18：2n6及C18：3n3含量随油脂添加量的增加而增加，肝胰腺中C18：3n3含量呈递增趋势，肌肉和肝胰腺中C20：5n3和C22：6n3含量则随着油脂添加量的增加而减少。曰粮脂肪水平对罗氏沼虾生长、体组织粗脂肪含量及多不饱和脂肪酸有显著影响。

3 diets supplemented with the same ratios but varying in amounts of oils applied to Macrobrachium rosenbergii（ Ⅰ,0%; Ⅱ3%; Ⅲ,6%）, to investigate the effects of different lipid levels on growth, blood biochemical indices as well as composition of body tissues in Macrobrachium rosenbergii. The results indicated： the growth rate in treatment Ⅱ was greater than that in treatment Ⅰ significantly （P〈0.05）,no significant difference was observed in treatment Ⅲ; the EE content both in whole shrimps and in muscles increased dramatically in accordance with elevated oil supplementation （P 〈0.05）; the content of C 18：2n6 in muscles and C18：3n3 either in muscles or in hepatopancreas increased, while the content of C20：5n3 and C22：6n3 decreased with increment of oils in diets respectively. We can speculate from this research that different lipid level in diets may take effects on growth performance, EE and PUFA in body tissues in Macrobrachium rosenbergii.