Lipid analysis of fillets from giant grenadier (Albatrossia pectoralis), arrowtooth flounder (Atheresthes stomias), Pacific cod (Gadus macrocephalus) and walleye pollock (Theragra chalcogramma).

摘要

In Alaska, walleye pollack (Theragra chalcogramma) and Pacific cod (PC; Gadus macrocephalus) are harvested in large amounts. However, although large biomasses of arrow-tooth flounder (ATF; Atheresthes stomias) and giant grenadier (Albatrossia pectoralis) are also available in Alaskan waters, these fish are underutilized. The objective of this study was to determine lipid content, lipid class distribution and fatty acid (FA) profiles of fillets from these 4 fish species. Fat content and percentage of triacylglycerides (TAG) in ATF was significantly higher than in the other tested species, whereas relative proportions of phospholipids (PL) were lower (P < 0.05). PC contained the largest amounts of omega-3 FA, whereas ATF contained the smallest amounts. The ratio of omega-3/omega-6 FA was significantly higher in ATF than in other species. ATF contained approx. equal amounts of PUFA and saturated FA, whereas the other species contained at least twice as much PUFA as saturated FA.