For for fiskeoppdrett inneholdende fiskemel

摘要

A feed composition for fish breeding with an improved preference for fish comprises from 0.03 to 1% by weight of each of 5'-guanylic acid, 5'-cytidylic acid, 5'-uridylic acid and 5'-adenylic acid or 5'-inosinic acid, all of which are hydrolyzates of ribonucleic acid, or a yeast extract containing a large amount of the foregoing 5'-nucleotides and oligopeptide.