Collected reprints: Abstract 3178
Collected reprints
Abstract
Lavens, P.; Léger, P.; Sorgeloos, P. (1989). Manipulation of the fatty acid profile in Artemia offspring produced in intensive culture systems. Aquaculture : a biotechnology in progress 1: 731-739
The presence of highly unsaturated fatty acids is a principal factor which determines the food value of Artemia nauplii for marine shrimp and fish larvae. In an attempt to explain the variation in essential fatty acid content in Artemia from different sources we have studied the effect of diet on the fatty acid profile of Artemia offspring (ovi- or ovoviviparous) produced in controlled culture systems. The parental populations tested originated from Lavalduc (France) and Great Salt Lake (Utah, USA); they were fed different diets consisting of dried Spirulina and/or defatted rice bran, eventually coated with cod liver oil. The analytical data indicate that the fatty acid profile of the Artemia reflects the composition of the diet fed to the parental brine shrimp regardless of the strain used. Moreover, the level of omega3 highly unsaturated fatty acids (omega3-HUFA) in the cysts and nauplii can be significantly increased by feeding the parental stock with omega3-HUFA-fortified diets. From this study we can conclude that the natural production of Artemiacysts with a high omega3-HUFA content will be limited to those biotopes where natural or man-managed conditions enhance the dominant presence of a omega3-HUFA-rich diet.
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