摘要 : A feeding trial was conducted in aquaria with juvenile hybrid catfish (channel catfish <i>Ictalurus punctatus</i> x blue catfish <i>I. furcatus</i>) to evaluate distiller's dried grains with solubles (DDGS) as a replacement for a ... 展开 A feeding trial was conducted in aquaria with juvenile hybrid catfish (channel catfish <i>Ictalurus punctatus</i> x blue catfish <i>I. furcatus</i>) to evaluate distiller's dried grains with solubles (DDGS) as a replacement for a combination of soybean meal (SBM) and corn meal (CM). Twenty-five 75-L glass aquaria were each stocked with 30 juvenile hybrid catfish (initial weight=1.16-1.25 g). Five replicates were randomly assigned to each of five dietary treatments. Diet 1, the basal diet, contained 32% SBM and 20% CM (no DDGS and no lysine supplementation) and was based on a practical diet formulated for channel catfish. Diet 2 contained 20% DDGS and 0% lysine supplementation; diet 3 contained 20% DDGS and 0.10% lysine supplementation; diet 4 contained 30% DDGS and 0% lysine supplementation; and diet 5 contained 30% DDGS and 0.20% lysine supplementation. Fish were fed at a restricted rate equaling 5% of wet body weight twice daily for 8 weeks. There were no significant differences in percent weight gain or final weight among the four treatments with DDGS supplements. However, weight gain and final weights of fish offered diet 1 were significantly poorer than those of fish offered diets 3-5. These diets also produced significantly lower feed conversion ratios and higher protein efficiency ratios than diet 1. Results of the present study indicate that the diets formulated with 30% DDGS using the reported combination of other protein sources were not deficient in lysine and supported good growth and feed utilization in juvenile hybrid catfish. 收起