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Title: LIPID ANALYSIS OF FILLETS FROM GIANT GRENADIER (ALBATROSSIA PECTORALIS), ARROW TOOTH FLOUNDER (ATHERESTES STOMIA), PACIFIC COD (GADUS MACROCEPHALUS) AND WALLEYE POLLOCK(THERAGRA CHALCOGRAMMA).

Author
item OLIVEIRA, A - UNIV. OF ALASKA, FITC
item Bechtel, Peter

Submitted to: Journal of Muscle Foods
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/26/2006
Publication Date: 1/26/2006
Citation: Oliveira, A.C., Bechtel, P.J. 2006. Lipid analysis of fillets from giant grenadier (albatrossia pectoralis), arrow tooth flounder (atherestes stomia), pacific cod (gadus macrocephalus) and walleye pollock(theragra chalcogramma). Journal of Muscle Foods 17:20-33.

Interpretive Summary: In Alaska, fish harvested in the largest amounts are Walleye Pollock (WP) and Pacific Cod (PC); however there are very large biomasses of Arrow Tooth Flounder (ATF) and Giant Grenadier (GG) that are underutilized. The objective of this study was to determine and compare lipid class distribution and fatty acid (FA) profiles of fillets from these four fish species. GG is an underutilized species and fillets had a very low lipid content at 0.2%. ATF is another underutilized species and fillets contained much higher lipid contents of approximately 3.5%. The ATF lipid had many unique properties including a higher saturated fat/polyunsaturated ratio and high omega-3/'omega-6 ratio. WP and PC fillets had similar lipid contents of approximately 0.6%; however, a number of differences were detected including saturated fat/polyunsaturated fat ratios and omega-3/'omega-6 ratios. This study has provided a valuable comparison of lipid profiles in the two abundant but underutilized species (Arrow Tooth Flounder and Giant Grenadier) and the two most abundant white fish harvested in Alaska (Cod and Pollock).

Technical Abstract: In Alaska, fish harvested in the largest amounts are Walleye Pollock (WP) and Pacific Cod (PC). There are very large biomasses of Arrow Tooth Flounder (ATF) and Giant Grenadier (GG) that are underutilized. The objective of this study was to determine and compare lipid class distribution and fatty acids (FA) profile of fillets from these four fish species. Fat content and percent triglycerides in ATF (3.5%) was significantly higher than other species, and percent phospholipids were lower (p>0.05). PC had the highest levels of omega-3 ('3) FA at 50%, whereas ATF had the lowest at 25%. The ratio of '3/'6 FA was significantly higher in ATF (17.5) than in other species, which ranged between 11.7 to13. Percent polyunsaturated and saturated FA were equivalent in ATF; however, other species showed at least twice as much polyunsaturated FA as saturated FA. This study has provided a valuable comparison of lipid profiles in the two abundant but underutilized species (Arrow Tooth Flounder and Giant Grenadier) and the two most abundant white fish harvested in Alaska (Cod and Pollock).