Abstract
Although sterols are very important in insect physiology they cannot be synthesized by insects which therefore have a necessary requirement for a dietary source of sterols. Cholesterol was included in the larval and adult diets of Ceratitis capitata and the patterns of fatty acid composition in different development stages determined. The presence of cholesterol in the larval diet did not influence the fatty acid patterns of either larvae or pharate adults. Nevertheless, the fatty acid pattern of adults coming from those larvae exhibited an increase in polyunsaturated fatty acids. The presence of cholesterol in the adult diet resulted in a similar change. Influence of cholesterol was also observed on triglycerides and free fatty acids; the difference in the distribution of polyun-saturated fatty acids between both lipid classes was enhanced by the presence of cholesterol in the diets.
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