闽南近海条纹斑竹鲨肌肉脂肪含量及脂肪酸组成分析

The Total Lipid and Fatty Acids in the Muscle of Chiloscyllium palgiosum(Bennett,1830),from Southern Fujian Coast Waters

用氯仿-甲醇法提取条纹斑竹鲨肌肉的粗脂肪，经甲酯化处理。用气相色谱法对其脂肪酸的组成进行分析．结果显示，闽南近海条纹斑竹鲨肌肉的含脂量为1．27％～5．22％，平均值为2．72％（鲜质量），属于低脂肪含量的鱼类．在该种鱼的肌肉中共检测到24种脂肪酸，其中饱和脂肪酸含量为（23．96±3．68）％，单不饱和脂肪酸含量为（16．04±2．27）％，多不饱和脂肪酸含量为（54．36±4．13）％，肌肉中脂肪酸以C16、C18、C22三系列脂肪酸为主，其中C22：6（DHA）含量最高，达到19．09％．研究结果表明，条纹斑竹鲨肌肉脂肪内含有高比例的不饱和脂肪酸，尤其是多不饱和脂肪酸。其肌肉有低脂肪、高蛋白，富含多不饱和脂肪酸的特点。具有很高的营养价值．

The lipid content and fatty acid composition of muscle were determined in white-spotted bamboo shark （Chiloscyllium plagiosum） caught from Southern Fujian coast waters in Southeast of China. The sample muscles was extracted oil content by chloroform-methanol （2 ： 1）,esterified by HCl-methanol. The fatty acid methyl ester were analyzed on a gas chromatograph （Agilent 6890） equipped with a flame ionization detector （GC-FID）. The total lipid content from the muscle of white-spottede bamboo shark was ranged from 1.27 % -5.22 % and total 24 fatty acids components were identified. In all samples, saturated fatty acids （SFAs） accounted for （23.96 ± 3.68）% of the total fatty acid composition. The major fatty acid within this group was palmitic acid （C16：0）, followed by stearic acid （C18：0）. The monounsaturated fatty acids （MUFAs） accounted for （16. 04±2.27）%. The major fatty acid in this group was oleic acid （C18：1）. The content of polyunsaturated fatty acids （PUFAs） was （54.36 ± 4. 13）%. DHA （C22：6ω-3） was the major fatty acid,and followed by AA （C20：4ω-6）. X-fa accounted for 5.77 % of the total fatty acid composition. The whitespotted bamboo shark muscle contained high level of unsaturated fatty acids,in which PUFAs was the main component. Compared to the total ω-3 PUFAs（39.74 %）,the amount of ω-6 PUFAs was low and accounted for 14.78% of the total fatty acid in muscle. The ratio of ω-3/ω-6 was 2.78. One trait of C. palgiosum muscle lipid was a high percentage of unsaturated fatty acids,another is rich in physiologically active high polyunsaturated fatty acid.