Figure 3

Phylogenetic tree of the common Bacteria (in bold) occurring in the water column of the rearing tanks of Archocentrus nigrofasciatus and Pterophyllum scalare at the beginning (0d), middle (30d) and the end (60d) of the growth period. The tree of the Bacteria 16S rRNA gene phylotypes (ca. 1,500 bp, 1013 positions) was based on the neighbour-joining method as determined by distance using Kimura’s two-parameter correction. One thousand bootstrap analyses (distance) were conducted, and percentages ≥50% are indicated at nodes. Numbers in brackets are GenBank accession numbers. Scale bar represents 2% estimated distance.