Exploitable Lipids and Fatty Acids in the Invasive Oyster Crassostrea gigas on the French Atlantic Coast

• Published in: Marine Drugs
• Main Authors: Dagorn, Flore, Couzinet-Mossion, Aurélie, Kendel, Melha, Beninger, Peter, G, Rabesaotra, Vony, Barnathan, Gilles, Wielgosz-Collin, Gaëtane
• Other Authors: Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2016
• Subjects: Crassostrea gigas fatty acids health and nutrition bivalve mollusc non-methylene interrupted fatty acids plasmalogens phospholipids seasonal variations; Crassostrea gigas; fatty acids; health and nutrition; bivalve; mollusc; non-methylene interrupted fatty acids; plasmalogens; phospholipids; seasonal variations; [CHIM]Chemical Sciences; Pacific oyster
• Online Access: https://nantes-universite.hal.science/hal-04050824; https://nantes-universite.hal.science/hal-04050824/document; https://nantes-universite.hal.science/hal-04050824/file/marinedrugs-huitre%2016.pdf; https://doi.org/10.3390/md14060104

International audience Economic exploitation is one means to offset the cost of controlling invasive species, such as the introduced Pacific oyster (Crassostrea gigas Thunberg) on the French Atlantic coast. Total lipid and phospholipid (PL) fatty acids (FAs) and sterols were examined in an invasive population of C. gigas in Bourgneuf Bay, France, over four successive seasons, with a view to identify possible sources of exploitable substances. The total lipid level (% dry weight) varied from 7.1% (winter) to 8.6% (spring). Of this, PLs accounted for 28.1% (spring) to 50.4% (winter). Phosphatidylcholine was the dominant PL throughout the year (up to 74% of total PLs in winter). Plasmalogens were identified throughout the year as a series of eleven dimethylacetals (DMAs) with chain lengths between C 16 and C 20 (up to 14.5% of PL FAs + DMAs in winter). Thirty-seven FAs were identified in the PL FAs. Eicosapentaenoic acid (20:5n-3 EPA/7.53% to 14.5%) and docosahexaenoic acid (22:6n-3 DHA/5.51% to 9.5%) were the dominant polyunsaturated FAs in all seasons. Two non-methylene-interrupted dienoic (NMID) FAs were identified in all seasons: 7,13-docosadienoic and 7,15-docosadienoic acids, the latter being present at relatively high levels (up to 9.6% in winter). Twenty free sterols were identified, including cholesterol at 29.9% of the sterol mixture and about 33% of phytosterols. C. gigas tissues thus contained exploitable lipids for health benefits or as a potential source of high-quality commercial lecithin.