Abstract
A 28-day feeding trial was conducted for comparing the effect of different dietary phospholipid (PL) classes on the growth of post-larval turbot and on the incorporation of dietary neutral lipid fatty acids into their body lipids. Prior to the experiment the turbot were weaned for one week on a PL-free diet. The nine experimental diets were isolipidic and contained an equal amount of highly unsaturated fatty acids in the form of ethyl esters. They differed by their PL content (0, 1 or 2%) and by the PL class composition of the added soybean PL fractions.
Highlights
Considerable attention has been paid to n-3 highly unsaturated fatty acids (HUFA) in nutritional studies on marine fish larvae (Watanabe et al 1983; Izquierdo et al 1989; Watanabe 1993)
A concentrated form consists of fatty acid ethyl esters prepared from fish oil (Coutteau et al 1995), which were demonstrated to result in a docosahexaenoic acid (DHA) level in the fish proportional to that in the diet (Coutteau et al 1996)
The aim of the present study was to compare the efficiency of different PL classes for enhancing the incorporation of HUFA presented in the diet as neutral lipid
Summary
Considerable attention has been paid to n-3 highly unsaturated fatty acids (HUFA) in nutritional studies on marine fish larvae (Watanabe et al 1983; Izquierdo et al 1989; Watanabe 1993). The weaning diets of marine fish are supplemented with n-3 HUFA-rich lipid sources. A concentrated form consists of fatty acid ethyl esters prepared from fish oil (Coutteau et al 1995), which were demonstrated to result in a DHA level in the fish proportional to that in the diet (Coutteau et al 1996). We established that for a similar supply of DHA ethyl esters by the diet, the DHA level in the fish was increased by supplementing the weaning diet with phospholipids (PL), either of vegetable or of animal origin (Geurden et al 1997b, c)
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