Abstract
The main fatty acids of total lipid from wild and cultured postlarvae-10 (PL-10) of Penaeus vannamei obtained throughout 1 year from five different sampling sites along the Ecuadorian shore and four shrimp hatcheries, were analysed by gas-liquid chromatography. Cultured larvae showed higher levels of 18:3 n − 3 but lower levels of 20:5 n − 3 and 22:6 n − 3 than the wild ones. The fatty acid profile of wild postlarvae had a higher degree of unsaturation during the dry colder season than during the wet and hotter winter months. Wild and cultured postlarvae were clearly separated when the total lipid fatty acid results were introduced in a multivariate discriminant analysis model.
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