梭鱼脂肪及脂肪酸成分分析和评价  

Analysis and Evaluation of Fat Content and Fatty Acid Composition of Liza haematocheila

作　　者：杨文平[1,2] 王爱民[1] 吕林兰[1,3] 刘飞[1] 於叶兵[1] 

机构地区：[1]盐城工学院海洋与生物工程学院,江苏省沿海池塘养殖生态重点实验室,江苏省沿海养殖鱼类饲料工程技术研究中心,江苏盐城224051 [2]南京农业大学动物科技学院,江苏省动物源食品生产与安全保障重点实验室,江苏南京210095 [3]盐城天邦饲料科技有限公司,江苏盐城224014

出　　处：《食品科学》2015年第20期181-184,共4页Food Science

基　　金：盐城市农业科技创新专项引导资金项目(YK2013041);苏北科技计划专项资金-富民强县项目(BN2014033);江苏省产学研前瞻性联合研究项目(BY2014108-10);2014年度国家星火计划项目(2014GA690215);盐城市农业科技计划指导性项目(YKN2014013);淮安市科技创新平台与产学研载体建设计划项目(HAP201452)

摘　　要：为了解梭鱼的应用价值,对江苏沿海滩涂池塘养殖梭鱼（均质量（445.8±26.9）g）6种组织（鱼头、鱼皮、背肌、腹肌、肝脏、腹脂）的脂肪分布、性质、脂肪酸组成进行分析和评价。索氏提取法测定组织中脂肪含量,滴定法测定脂肪的碘值和酸价,气相色谱-质谱法分析脂肪酸的组成。结果表明：梭鱼体内各组织脂肪分布差异显著（P〈0.05）,其中背肌和腹肌中脂肪含量分别为3.66%、10.16%;各组织脂肪的不饱和程度较高,碘值为90～106 g/100 g;各组织脂肪酸价较高,介于4～9 mg KOH/g之间;梭鱼脂肪中C22∶6n 3和C20∶5n 3含量丰富,品质好;鱼头、背肌、腹肌中饱和脂肪酸、单不饱和脂肪酸、多不饱和脂肪酸构成比例约为1∶1.5∶（0.7～0.8）,n-3/n-6多不饱和脂肪酸比值在0.7～0.8之间,组成合理;肝脏和腹脂中脂肪含量丰富,其中含有大量的n-3和n-6多不饱和脂肪酸,因此梭鱼的内脏也具有较好的可利用前景。To explore the application value of mullets（Liza haematocheila）, six tissues including fish head, skin, dorsal muscle, abdominal muscle, liver and abdominal fat of mullets（average weight（445.8 ± 26.9） g） from coastal beach pools in Jiangsu Province were investigated for fat distribution, fat properties and fatty acid composition. Lipid content was determined using Soxhlet extraction, and iodine value and acid value were measured using titration method, and fatty acid composition was identified by gas chromatograph-mass spectrometry（GC-MS）. The results showed that significant differences in fat contents were observed among six tissues（P 0.05）, and that the fat contents of dorsal muscle and abdominal muscle were 3.66% and 10.16%, respectively. The fats of mullets were highly unsaturated with iodine value in the range of 90–106 g/100 g. The fatty acid values were high, which were between 4 and 9 mg KOH/g. The lipids of mullets were of good quality, rich in C22：6n 3（docosahexaenoic acid, DHA） and C20：5n 3（eicosapentaenoic acid, EPA）. The proportions of saturated fatty acids（SFA）, monounsaturated fatty acids（MUFA）, and polyunsaturated fatty acids（PUFA） of fish head, dorsal muscle and abdominal muscle of mullets were about 1：1.5：（0.7-0.8）, and reasonable ratios between n-3 and n-6 PUFAs in the range of 0.7–0.8 were observed. As for the liver and abdominal fats, plenty of n-3 and n-6 PUFA were found. Therefore, the viscera of mullets could also have good utilization prospect.

关 键 词：梭鱼 脂肪 碘值 酸价 脂肪酸组成 

分 类 号：S965.234[农业科学—水产养殖]