Abstract
Fermented krill sauce residue (FKS) is currently being disposed as waste derived from food processing industry. In an attempt to utilize this waste as a component in fish feed, this study assessed the growth performance of rainbow trout, Oncorhynchus mykiss and red sea bream, Pagrus major upon feeding extruded pellets (EP) containing the FKS or pellets without it (control) .
The growth and feed efficiency of rainbow trout fed the EP containing 5% FKS was similar to that of the control fish for the 70-day feeding period. There was no difference in moisture, crude protein and crude lipid of muscle between the two groups of fish. In the case of red sea bream, the growth performance of fish fed the EP containing 10% FKS was equal to that of fish fed the control EP at the end of the 45-day rearing period, but the growth performance and feed efficiency were superior to those of fish that received EP containing 5% FKS.
These results suggest that FKS could be included in EP up to 5% in the case of rainbow trout and up to 10% for red sea bream without any particular drop in overall performance.
