Fractional contributions of live prey and dry feed to carbon and nitrogen in muscle tissue grown by juvenile channel catfish in tanks and ponds. Food contributions to fish muscle tissue were estimated using the stable isotopemass-balancemixing modelMixSIR (Moore and Semmens, 2008). Values are the 50th (25th; 75th) percentiles of the posterior probability distributions for each MixSIR model run.