Fig 5. PCoA plots of unweighted UniFrac comparing the intestinal microbiota of channel catfish to that of environmental samples at each time point samples.

At all time points, the water microbiota is represented by two replicate samples taken at the end of the trial (193 dph) from the inflowing water supplied to the culture tank. (A) At 3 dph the larval sac-fry had not received any exogenous diets, so environmental comparisons are restricted to the replicate water-supply samples. At 65 dph (B), 125 dph (C), and 193 dph (D) the catfish gut microbiota samples are compared to the replicate water supply samples, as well as the microbiota of all diets unique to that time point.