Larvae bloom on krill
The GIA (gRUPO DE INVESTIGACION EN ACUICULTURA)found that body weight, total length and specific growth rate of gilthead sea bream larvae reared on diets with krill phospholipids were significantly higher than those of larvae on a control diet using soya lecithin.
In addition, fatty acid composition was preferable and there were further indications that krill-derived products confer other important benefits as well, according to GIA research specialist Marisol Izquierdo.
The sea bream were grown for 15 days on a diet of enriched rotifers and then given one of four experimental diets or the control diet which contained squid meal, soya lecithin and sardine oil.
In the first krill diet, QRILL™ oil substituted for both the soya lecithin and the sardine oil. In the second, QRILL™ concentrate partially substituted for the squid meal, soya lecithin and sardine oil, and in the last, QRILL™ meal was used. In GIA test tanks, those diets containing some QRILL™ products outperformed the control diet.
“All larvae fed krill diets were significantly larger than the larvae on the control diet,” says Izquierdo, adding that the diet containing QRILL™ oil showing the largest gains of all.
“In general, we recommend the oil product for starter diets with a change to Antarctic QRILL™ krill meal as the larvae progress to larger pellets,” says Sigve Nordrum, Aker BioMarine vice president.