Seasonal Variation of Proximate Composition and Lipid Nutritional Value of Two Species of Scallops (Chlamys farreri and Patinopecten yessoensis)

The scallops Chlamys farreri and Patinopecten yessoensis from the Yellow Sea are evaluated according to the seasonal changes of lipid nutritional value including lipid classes, phospholipid (PL) classes, fatty acid (FA) composition, atherogenicity index (IA), thrombogenicity index (IT), and glycerophospholipid molecular species, for the first time. More than 32 species of glycerophosphocholine (GPCho) and 42 species of glycerophosphoethanolamine (GPEtn) are determined. For samples harvested in February, the PL molecular species containing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) account for 48.57-50.77% and 80.45-85.50% of total molecular species, respectively, for GPCho and GPEtn. Moreover, the samples harvested in February contain higher levels of polyunsaturated fatty acid (PUFA) (58.76-59.12% of total FA) and PL (84.67-85.11% of total lipids) but lower level of cholesterol (8.77-10.10%) as well as IA (0.29-0.31) and IT (0.12-0.13) compared to samples harvested in other seasons. Therefore considering nutritional value, the lipids from scallops (C. farreri and P. yessoensis) harvested in February have better value in view of commercial exploitation. Practical Application: A systematic and in-depth investigation on seasonal changes in basic component and lipid nutritional value in adductor muscle of C. farreri and P. yessoensis is reported in this contribution. This useful information makes it possible to use scallop lipid for producing higher value-added products in view of commercial exploitation. Chlamys farreri and Patinopecten yessoensis from the Yellow Sea are evaluated according to the seasonal changes of lipid qualities including lipid classes, phospholipid classes, fatty acid composition, atherogenicity index, thrombogenicity index, and glycerophospholipid molecular species for the first time. Considering nutritional value, the lipids from scallops (C. farreri and P. yessoensis) harvest in February have better value in view of commercial exploitation.