Furan Fatty Acids in the Lipids of the Cresthead Flounder.

Abstract

The lipid classes and fatty acids of flesh, liver, and gonad from male cresthead flounder Li-manda schrenki were investigated with special reference to furan fatty acids (F acids). The major lipid classes were phospholipids (PL)(60.0-69.4% of total lipids), followed by triacylglycerols (TG)(19.8%) in the flesh, free fatty acids (FFA)(16.4%) in the liver, and sterols (ST)(25.0%) in the testis. The liver lipids contained particularly large amounts (9.2%) of sterol esters (SE) when compared to those from flesh and testis. F acids were found in liver lipids in high amounts (12.22% of total fatty acids), but in the flesh and testis, in much smaller amounts (less than 0.3%). In the liver lipid classes, F acid content was 53.09% of total fatty acids in SE, 9.06% in TG, 7.46% in FFA, and 4.86% in PL. In F acids of liver SE, F4 (12, 15-epoxy-13, 14-dimethyloctadeca-12, 14-dienoic) acid was the major component (60.5% of total F acids), following by F8 acid (31.4%) and F5 acid (4.5%).