keywords: Lanistes libycus, lipid composition
This study determined the lipid profile of Lanistes libycus edible portion on dry weight basis. The parameters determined were total crude fat, total fatty acids, sterols and phospholipid levels. Calculated from the main results were total fatty acid; total energy (both in kJ and kcal) in various sources; fatty acid in edible portion (EP); fatty acid quality parameters such as MUFA/SFA, PUFA/SFA, EPA/DHA, n-6/n-3 (LA/α-LA),Ʃn-6/Ʃn-3, AA/DGLA, EPA + DHA, ESPI (MUFA/PUFA), C16:0 : C18: cis – 9, C18:0 : C18 : 1cis – 9, %C16:0 in ƩSFA, %C18:0 in ƩSFA and ƩUFA (MUFA + PUFA). The sample contained 3.30 g/100g crude fat and 2.86 g/100g total fatty acid. Whilst total energy of crude fat was 122 kJ/100g, the value for total fatty acid was 106 kJ/100g. The following fatty acids were high in concentration (% total fatty acid): C16:0 (15.5), C18:0 (6.69), C18:1 (cis – 9) (7.28), C22:1 (cis – 13) (6.27), C20:2 (cis – 11, 14) (5.70), C20:5 (cis – 5, 8, 11, 14, 17) (14.2) and C22:6 (cis – 4, 7, 10, 13, 16, 19) (29.0). The values for total saturated fatty acid, monounsaturated fatty acids and total polyunsaturated fatty acids are 25.7, 20.3, and 53.9%, respectively. The energy values (kJ/100g) for saturated fatty acid, monounsaturated fatty acids and total polyunsaturated fatty acids were 27.2 (25.7%), 21.5 (20.3%) and 57.0 (53.9%) respectively. These parameters were nutritionally good in the sample MUFA/SFA, PUFA/SFA, EPA/DHA, n-6/n-3 (LA/α-LA), AA/DGLA, EPA + DHA, EPSI and ƩUFA. In the sterols, only cholesterol was significant (although still very low) at 44.0 mg/100g (or 99.9938%). The total phospholipid value was 406 mg/100g and was dominated by phosphatidylcholine (PC) and followed slightly by phosphatidylethanolamine (PE) with a value of 245 mg/100g (or 60.4%) and 99.1 mg/100g (or 24.4%), respectively. Lanistes libycus could therefore be said to be low in fat content but very good in unsaturated fat at 74.3%, low in sterol with total value of 44.01 mg/100g and moderate in phospholipids with a total of 406 mg/100g.
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