| abstract |
Disclosed is a feed composition for culturing fishes, which comprises a peptide represented by the general formula (I): ##STR1## wherein Cys-Cys means a disulfide linkage of cysteinyls; each of R 1 , R 2 , R 3 and R 4 independently represents γ-L-glutamyl or glycyl; each of m,n,p and q is an integer of 0 or 1, provided that m,n,p and q are not simultaneosuly 0; and a conventionally formulated fish feed. n The peptide in the feed composition is effective in treating and preventing hepatic disorders of cultured fishes. |