Effects of Dietary Cottonseed Meal and Gossypol on Growth of Young Channel Catfish

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Abstract
Ten isonitrogenous and isocaloric diets containing different percentages by weight of cottonseed ineal or gossypol acetate were fed to age‐0 channel catfish Ictalurus punctatus for 8 weeks. Growth was inhibited when fish were fed diets with more than 17.4% cottonseed meal or with 0.09% and greater free gossypol. Fish fed cottonseed meal at 17.4% or greater had higher wholebody concentrations of free gossypol than fish fed lower amounts. Free gossypol in muscle tissue was less than that recommended as safe for human consumption. Free gossypol was most concentrated in liver and kidney tissue. Channel catfish utilized lysine hydrochloride when a diet was supplemented with that amino acid.