Production characteristics were not analyzed separately because the two sizes of fish were not clearly separated. However, there were no differences in the total amount of feed fed, overall gross and net yield, mean fish weight at harvest, FCR, and survival among dietary treatments (Table 2). This generally agrees with Robinson etal. (2001), who reported no significant differences in production characteristics in channel catfish fed 32% protein diets containing 0, 25, or 50% CGF. It should be noted that the control diet used in that study contained 3% bovine meat and bone/blood meal, which was slightly different from the control diet used in the present study.