FISH OIL REPLACEMENT BY DIFFERENT MICRO ALGAL PRODUCTS IN MICRODIETS FOR EARLY WEANING OF GILTHEAD SEABREAM (Sparus aurata)

摘要

The aim of this study was to determine if algal products rich in Docosahexaenoic acid (DHA) or Arachidonic acid (ARA) are able to completely replace fish oil in microdiets for marine fish larvae, gilthead seabream and if extra supplementation with eicosapentaenoic acid (EPA) may further enhance larval performance.20 day-old gilthead sea bream larvae of 5.97±0.4 mm mean total length and 0.0012=t0.000 l|ig mean dry body weight were fed with five microdiets tested by triplicate: a control diet based on sardine oil; a diet containing AquaGrow DHA (diet DHA) to completely substitute the sardine oil; a diet containing AquaGrow ARA (diet ARA); a diet containing both products, AquaGrow DHA and AquaGrow ARA to completely substitute the fish oil; and, a diet containing both products, AquaGrow DHA and AquaGrow ARA, together with an EPA source. Temperature, air activity and salinity tests were also performed to detect larval resistance to stress.