Seasonal variations in the total lipid content and fatty acid composition of cultured and wild Crassostrea madrasensis in Sri Lanka

Heliyon
Madhusha Mihirani SubasingheSevvandi Jayakody

Abstract

The marketplace contains a choice of both cultured and wild oysters, often subtle differences in taste and characteristics are observed between wild and cultured oysters. Therefore, seasonal variations of total lipid and total fatty acid compositions were studied in both, wild and cultured populations of Crassostrea madrasensis in Gangewadiya in Kala-Oya estuary and in cultured populations in the Puttalam lagoon in Sri Lanka over a 13 month period. The fatty acid profile was analyzed using Gas Chromatography. The average lipid percentage was 1.28 ± 0.02% and there was no significant difference between cultured and wild oysters (p > 0.05). A total of 17 fatty acids was detected. Significant monthly variations were seen in all fatty acids, except docosapentaenoic acid (DPA/C22.5(n-3)) and docosahexaenoic acid C226(n-3). Significantly high concentrations (p < 0.05) of omega 3 fatty acids were recorded during October while significantly higher omega 6 concentrations were recorded during April (p > 0.05). Saturated fatty acids had the highest concentration followed by polyunsaturated fatty acids and monounsaturated fatty acids. Palmitic acid was the major saturated fatty acid and docosahexaenoic acid was the major polyunsaturated fa...Continue Reading

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