5Wilson R P, Harding D E, Garling D L Jr, et al. Effect of dietary pH on amino acid utilization and the lysine requirement of fingerling channel catfish [J]. J Nutr, 1977,107: 166-170.
6Association of Official Analytical Chemists. Official methods of analysis[M]. 14th ed. Arlington, VA : AOAC, 1984.
7Bergmeyer H U. Methods of enzymatic analysis [M]. Deerfield Beach: Vch Pub, 1974.
8Cuesta A, Ortuno J, Rodriguez A, et al. Changes in some innate defence parameters of seabream ( Sparus aurata L) induced by retinol acetate [ J ]. Fish & Shellfish Immunol, 2002,13 ( 4 ) : 279 - 291.
9Walton M J, Cowey C B. Aspects of ammoniogenesis in rainbow trout, Salmo gairdneri [ J ]. Comp Biochem Physiol, 1977, 57 : 143 - 149.
10National research council nutrient requirements of fish[M]. Washington, D. C. : National Academy of Sciences, 1977.
