Yasmeen, M.F. & A. Saboor. (2019). Comparative fatty acid analysis of wild and cultured freshwater harpacticoid copepod – Onychocamptus mohammed (Blanchard and Richard, 1891). International Journal of Life Sciences Research. 7(1):437-442. Mar 2019.

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Yasmeen, M.F. & A. Saboor

2019

7(1):437-442. Mar 2019

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The fatty acid profile of Onychocamptus mohammed (Blanchard and Richard 1891) from laboratory culture and the wild species from the habitat was ascertained using gas chromatography–mass spectrometry (GCMS) and compared. The fatty acids detected in this experiment have the carbon number ranging between C14-25. The wild sample showed the presence of 24 fatty acids in which the highest percentage was shown by nonadecanoic acid, methyl ester (2.25 ± 0.27%) and the lowest was shown by 15-tetracosenoic acid, methyl ester, (Z)- (0.04 ± 0.01 %); tetracosanoic acid, methyl ester (0.04 ± 0.02 %) and 5,8,11,14,17-eicosapentaenoic acid, methyl ester, (all-Z)- (0.04 ± 0.05 %). In cultured sample, 26 fatty acids were present and the highest percentage was shown by methyl hexadec-9-enoate (2.21 ± 0.03 %) and the least percentage was shown by heptadecanoic acid, methyl ester (0.05 ± 0.02 %) and heptadecanoic acid,16-methyl-, methyl ester (0.05 ± 0.01 %). The essential fatty acids such as docosahexaenoic acid (1.34 ± 0.19 %) and eicosapentaenoic acid (1.85 ± 0.01 %) were present in desired quantities in cultured sample and this ensures that the harpacticoid copepod, O. mohammed can serve as a live feed for developing shell fish and fin fish larvae. Keywords: fatty acid, live food, harpacticoid copepod

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