THE FATTY-ACID PROFILE OF SPARUS-AURATA LARVAE IS CORRELATED TO THE COMPOSITION OF THE ENRICHMENT DIETS OF BRACHIONUS-PLICATILIS AND ARTEMIA SP

The objective of the present work was to determine the effect of the e nrichment of rotifers (Brachionus plicatilis) and brine shrimp (Artemi a sp.) with different commercial emulsions and microalgae on polyunsat urated fatty acid (PUFA) composition of gilthead sea bream larvae, Spa rus aurata. Rotifers were fed four enrichment diets (marine Chlorella sp., and three commercial emulsions: Algal RotiferoTM, FrippakTM boost er and SelcoTM). The enrichment of Artemia sp. (Artemia SystemsTM, AF type) was carried out with instar I nauplii at a density of 250-300 na uplii/ml in 20-1 conical tanks, using two commercial emulsions (Troffi cTM and SelcoTM) and a microalgae (Chlorella sp.). The results showed that enriched preys were deficient in PUFA n-3 and may not provide the nutritional requirements of sea bream larvae, although the enrichment methodology seems to be efficient in order to incorporate in the larv ae the fatty acid treatment.