12 páginas, 4 tablasThe rotifer, Brachionusplicatifis, pre-fed on baker’s yeast, was enriched for 6 h with three commercial
products from Artemia Systems S.A., namely Protein Selco (microcapsules), Dry Selco (microparticles)
and Super Selco (an emulsion containing high levels of n-3 HUFA). The biochemical composition
(protein, carbohydrate, total lipid, lipid classes and fatty acids) and dry weight ofthe rotifers
before and after the enrichment experiments were studied. Two of the enrichers, Dry Selco and Super
Selco, are rich in lipid but poor in protein and carbohydrate. Protein Selco contains lipid as well as
protein and carbohydrate. The biochemical composition and the dry weight of the rotifers were changed
after 6 h of enrichment. The percentage of protein and lipid increased with all of the three enrichers
and the percentage of carbohydrate decreased slightly. Rotifer dry weight increased in rotifers enriched
on Protein Selco. Phospholipids, sterol esters+ waxes, triacylglycerols and free fatty acids increased
after the enrichment with the three enrichers while sterols slightly decreased when the rotifers
were fed on Protein Selco. The fatty acid content of the rotifers increased after the enrichment with
all ofthe enrichers and this increase was particularly apparent in the case of n-3 HUFAs (20: Sn-3 and
22 : 6n-3).This work was supported
by the contract-project “ Larval Nutrition of Turbot” with the fish farm Cultivo
de Peces S.A. (CULTIPECSA).Peer reviewe
