Lipid composition and fatty acid profiles of wild caught and cultured black tiger shrimp, Penaeus monodon, in Sri Lanka

Abstract

Lipid levels and fatty acid profiles in the flesh of wild caught and cultured Penaeus monodon were analyzed using, gas chromatography. The mean percentage lipid level of cultured P. monodon (3.9% ± 0 2 dry weight) was not significantly higher than that of the wild caught P. monodon (3.7% ± 0.1). The fatty acid profiles of wild caught and cultured shrimp were found to be significantly different from each other. The predominant fatty acids found in the flesh of both groups were Palmitic acid (16:0), Stearic acid (18:0), Oleic acid (18: ln-9), Vaccenic acid (18: ln-7), Linoleic acid (18:2n­6), Arachidonic acid-Omega-6 (20:4n-6), Eicosapentaenoic acid-Omega-3 (20:5n-3), and Docosahexaenoic acid-Omega-3 (22:6n-3). Total saturated fatty acids (38.12% ± 1.59) and polyunsaturated fatty acids (18.31% ± 1.57) contents were not significantly different in wild caught and reared P. monodon while monounsaturated fatty acid levels (44.82% ± 1.41) were significantly higher in wild caught P. monodon. Palmitoleic (C16:1), Heptadecenoic (C17:1), Myristoleic (C14:1), Vaccenic (C18: 1n-7), Hexadecatetaenoic (C16:4n-3), Alpha linoleic Omega-3 (C18:23n-3), Stearidonic (C18:4n-3), Docosatetraenoic (C22:4n-6), Docosapentaenoic (C22:5n-6) and Arachidonic Omega-6 (20:4n-6) contents were significantly high in wild caught shrimp, while Linoleic Omega-6 (18:2n-6) and Docosahexaenoic Omega-3 (22:6n-3) were significantly high in cultured shrimp.

Lipid composition and fatty acid profiles of wild caught and fattened mud crab, <i>Scylla serrata</i>, in Sri Lanka

“…The percentage of n-3 PUFA of S. serrata recorded from the present study was considerably higher than that of Penaeus monodon (Croos et al 2005). The most biologically active PUFAs viz, Eiciosapentaenoic acid (EPA), (C 20:5 n-3) and Docosahexaenoic acid (DHA), (C 22:6 n-3) are reported to contribute to highest proportion of total n-3 PUFAs in most species (Edirisinghe et al 1998).…”

“…In contrast only a minor proportion of fatty acid profile was represented by SFAs in S. serrata. Also the percentages of MUFAs and PUFAs recorded from the S. serrata were considerably high compared to those of some other seafood (Edirisinghe et al 1998) and wild caught Penaeus monodon (Croos et al 2005).…”

“…Saturated fatty acids contributes to major proportion of fatty acid profiles of many species of fish (Edirisinghe et al 1998) and wild caught and cultured Penaeus monodon (Croos et al 2005). In contrast only a minor proportion of fatty acid profile was represented by SFAs in S. serrata.…”

“…Typically in crustaceans (lobsters, crabs, and shrimps) the edible parts are low in fat (0.5-1.5%) (Ackman 2000). The total lipid content of S. serrata was much lower than that of black tiger shrimp (Penaeus monodon) (3.6-3.7%) (Croos et al 2005). However biochemical composition of S. serrata changes seasonally (Zafar et al 2004).…”

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“…), constituindo o valor energético expresso em percentagem de cada parte (Ribeiro & Seravali, 2007). Crustáceos de um modo geral desempenham um importante papel na nutrição de humanos, como fonte de vitaminas A e D, lipídeos e ácidos graxos saturados e insaturados (Croos, Jayasinghe, Edirisinghe & Silva, 2005).…”