The effects of a mono-algal diet and the starvation trials on the content of the lipid classes and the fatty acid composition of the digestive gland of the scallop Flexopecten glaber were assessed in 2010. Results have shown that starvation induces the mobilization of triacylglycerol into phospholipids in the digestive gland of the scallop F. glaber. Also, food deprivation induced the depletion of energetic fatty acids (14:0, 16:0, 20:5n-3) and the selective retention of essential and structural-type fatty acids (20:4n-6, 22:6n-3, 22:2). A significant increase of the non methylene interrupted dienoic fatty acid (22:2) was noted in the triacylglycerol of specimens exposed to mono-specific-diet based on the micro alga Isochrysis galbana clone Tahitian (T-Iso). This would be explained by the substitution to the 20:5n-3 through de novo synthesis of the 22:2.
K. Telahigue, I. Rabeh, T. Hajji, N. Ghazali, W. Masmoudi, M.S. Romdhane, M. El Cafsi
Digestive gland, Isochrysis galbana, fatty acid, food deprivation, Pectinids