Table 2.
Number of morphotypes (± SD) of bacterial groups in the digestive microbiota of Hypostomus auroguttatus from lentic (Res) and lotic (Riv) habitats and seasons.
| Bacterial group | Spring | Summer | Autumn | Winter | |
|---|---|---|---|---|---|
| Total anaerobes | Res | 5.3 ± 1.5a | 3.8 ± 1.2ab | 5.0 ± 1.2a | 2.5 ± 1.0b |
| Riv | 6.2 ± 1.3 | 4.0 ± 0.0a | 4.0 ± 0.0 | 4.0 ± 0.0 | |
| Bacteroides | Res | 0.5 ± 0.6a | 2.5 ± 0.6b | 2.4 ± 0.9b | 1.3 ± 1.5ab |
| Riv | 2.0 ± 1.4 | 2.0 ± 0.0 | 2.0 ± 0.0 | 3.5 ± 0.7 | |
|
| |||||
| Total aerobes | Res | 1.8 ± 3.5a | 4.3 ± 0.5b | 2.4 ± 0.9ab | 2.0 ± 1.1a |
| Riv | 0.0 ± 0.0 | 3.5 ± 2.1 | 3.0 ± 0.0 | 3.0 ± 4.2 | |
| Enterobacteria | Res | 4.3 ± 1.0 | 3.8 ± 2.1 | 3.2 ± 1.1 | 3.3 ± 3.9 |
| Riv | 6.9 ± 2.6 | 3.5 ± 2.1 | 4.0 ± 1.0 | 9.0 ± 4.2 | |
| Vibrio | Res | 0.0 ± 0.0a | 3.0 ± 2.7b | 1.2 ± 1.0ab | 0.8 ± 1.3ab |
| Riv | 0.6 ± 0.5 | 1.5 ± 0.7 | 1.0 ± 0.0 | 0.5 ± 0.7 | |
Different letters indicate significant difference between the seasons (Mann-Whitney non parametric test, p < 0.05).
Supplemented blood agar: total anaerobes; BBE agar: Bacteroides; Blood agar: total aerobes; MacConkey agar: enterobacteria; TCBS agar: Vibrio.