Technical Abstract: Feed intake, feed conversion ratio (FCR), and production of blue catfish Ictalurus furcatus and channel catfish I. punctatus were examined in one-acre ponds maintained at either a high or low (means of 4.29 and 2.54 ppm, [54.8 and 32.4 % air saturation] respectively) minimum dissolved oxygen (DO) concentration throughout the growing season. Two additional studies were conducted examining only blue catfish in 0.25-acre ponds maintained at either a high (means of 4.43 and 4.46 ppm [56.3 and 54.9 % saturation] in the two studies) or low (means of 1.41 and 1.64 ppm [18.3 and 20.1 % saturation]) minimum DO concentration. Blue and channel catfish exhibited similar feed intake, growth, gross and net production in the high-oxygen treatment in the one-acre ponds; within the low-oxygen treatment feed intake was over 8% lower and both gross and net production were significantly lower (14.5% and 18.3% lower, respectively) in the channel catfish ponds. FCR was similar between species and was not affected by oxygen treatment. In the blue catfish studies in the 0.25-acre ponds, feed intake and net gain were significantly better both years in the high-oxygen treatments; gross and net production were significantly better in the high-oxygen treatment in 2006 and approached significance in 2007. FCRs were similar among oxygen treatments both years. Data from these and other similar controlled studies indicate that feed intake in blue catfish, although not significantly better, tends to be higher than channel catfish maintained at a similar minimum DO concentration. Feed conversion is similar between channel and blue catfish, and is not affected by minimum DO concentration within the ranges examined.