摘要：Crude oils recovered from the viscera of conventionally and organically farmed gilthead sea bream ( Sparus aurata ), European seabass ( Dicentrarchus labrax ) and sharpsnout sea bream ( Diplodus puntazzo ) were characterised. Triacylglycerols (TAG) and phospholipids (PL) were the major lipid classes. Visceral oils contained high levels of n -3 polyunsaturated fatty acids (PUFA), in particular docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). The DHA/EPA ratios (range 1.66–2.46) were higher in organically farmed fish. Total PUFA and n -3 fatty acid levels varied according to both species and rearing system, and were higher in the conventionally farmed sparids. The ratios of n -3 to n -6 PUFA (1.42–2.19) were comparable to the values reported for muscle lipids, while the PUFA/SFA ratios (1.07–1.33) exceeded the recommended value. Visceral oils exhibited good oxidative stability, as judged by monitoring lipid oxidation products during storage at 63°C. These data indicate that the viscera of all three species may represent a good source for the production of omega-3 rich oils.
