| The suitability of microdiets for haddock (Melanogrammus aeglefinus ) was evaluated. Larvae slightly preferred microdiets containing liposomes instead of lipid-walled capsules. Co-feeding with live feeds or including gustatory stimulants at 0.5%dm basis did not significantly affect microdiet ingestion. Ingestion and assimilation were significantly affected by larval age. Larval performance was significantly poorer when fed experimental microdiets instead of live prey or commercial microdiet. With improved formulation, microdiets might be suitable for early weaning of haddock.; The essential fatty acid (EFA) requirements of haddock larvae were studied by manipulating EFA composition of rotifers (Brachionus plicatilis ). EFA levels of rotifers were related to EFA levels of larvae, but not related to larval performance. Rotifers fed baker's yeast were significantly smaller than control rotifers. Development of a method to produce EFA-free rotifers that meet the other nutrient requirements of rotifers and haddock is critical before EFA requirements of haddock can be determined. |
