메기(Parasilurus asotus)의 部位別 脂肪質成分의 分布

Distribution of Lipid Components in Various Tissues of Cat Fish, Parasilurus asotus

This study was designed to elucidate the lipid and its fatty acid composition in various tissues of cat fish. Parasilurus asotus. The free lipid contents in meat, skin and viscera were 5.62%, 26.34% and 19.27%, Whereas the bound lipid contents in those tissues were 2.34%, 2.30% and 19.27%, respectively. The neutral lipid contents in free lipid were 5 times higher than those in bound lipid. while the phospholipid contents in bound lipid were 4 times higher than in free lipid. The neutral lipid was mainly composed of triglyceride (79.84%-99.86%) in free lipid, and esterified sterol & hydrocarbon(55.12-64.33%) in bound lipid. The phospholipid was mainly composed at phosphatidyl choline(52.38-69.98%) and phosphatidyl ethanolamine (24.09-40.48%) in free lipid, and phosphatidyl choline (53.03-58.54%) and phosphatidyl ethamolamine(13.80-19.23%) in bound lipid. The major fatty acids of polar lipid in tree and bound lipids were CI6:0(28.37%, 21.99%). CI8:1(12.01%, 11.52%). C18:2 (17.93%, 14.12%) and C22:6 (17.22%, 20.63%), and those of nonpolar lipid in free and bound lipids were C16:0(14.81%, 18.94%). C18:1(25.93%, 10.89%) and C22:6 (9.95%, 23.44%), respectively. The total essential fatty acid(TEFA) content in skin was slightly higher than that in meat. In both polar and nonpolar lipids in meat w3-HUFA contents of polar lipid were 1.5-2.0 times higher than nonpolar lipid and also w3-HUFA content of bound lipid was slightly higher than that of free lipid. There were significant differences in the lipid classification and its fatty acid composition between free and bound lipids and/or in various tissues.