Grasas y Aceites, Vol 70, No 1 (2019)

First seasonal investigation of the fatty acid composition in three organs of the Tunisian bivalve Mactra stultorum

I. Chetoui
Faculty of Sciences of Tunis, Biology Department, Research Unit of Physiology and Aquatic Environment, University of Tunis, Tunisia

I. Rabeh
Faculty of Sciences of Tunis, Biology Department, Research Unit of Physiology and Aquatic Environment, University of Tunis, Tunisia

S. Bejaoui
Faculty of Sciences of Tunis, Biology Department, Research Unit of Physiology and Aquatic Environment, University of Tunis, Tunisia

K. Telahigue
Faculty of Sciences of Tunis, Biology Department, Research Unit of Physiology and Aquatic Environment, University of Tunis, Tunisia

F. Ghribi
Faculty of Sciences of Tunis, Biology Department, Research Unit of Physiology and Aquatic Environment, University of Tunis, Tunisia

M. El Cafsi
Faculty of Sciences of Tunis, Biology Department, Research Unit of Physiology and Aquatic Environment, University of Tunis, Tunisia


This study reveals information for the first time about the total lipid (TL) content and fatty acid composition (FA) of Mactra stultorum (M. corallina). Three edible organs (foot, mantle and adductor muscle) were the subjects of this research in order to determine the most favorable periods for their consumption in relation to seasonal variability. The results showed lower lipid content in the adductor muscles in summer (12.73 ± 2.55 mg/g dry matter); while a higher content was observed in winter (28.97 ± 3.50 mg/g dry matter). However, similar lipid contents were observed in the mantle and foot tissues among the seasons. The fatty acid composition of Mactra stultorum adductor muscles, mantle and foot was dominated by saturated fatty acids (SFA) and polyunsaturated fatty acids (PUFA). Palmitic acid (16:0) was the major saturated fatty acid (SFA) and reached higher levels during summer in the foot (26%), mantle (21%) and adductor muscles (25%). Among PUFA, eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3) showed significant variation among seasons with high levels recorded during winter and spring. Monounsaturated fatty acids (MUFA) did not show any remarkable variation among seasons for the three studied tissues. Seasonal changes in fatty acids were observed for all samples, reaching a maximum level in winter or spring.


Fatty acid composition; Mactra corallina; Season; Total lipid

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