Table 5.
Parasitological descriptors of ergasilids found in nostrils of fish from the Rio Pardo, São Paulo, Brazil
| Host | N | Ergasilidae | P% | MI ± s.e. (R) | MA ± s.e. (R) |
|---|---|---|---|---|---|
| Astyanax lacustris (Lütken, 1875) | 93 | Rhinergasilus piranhus Boeger and Thatcher, 1988 | 9.7 | 8.1 ± 2.9 (1–22) | 0.7 ± 0.3 (0–22) |
| 4.7 | 1.25 ± 0.25 (1–2) | 0.06 ± 0.03 (0–2) | |||
| Cyphocharax modestus (Fernández-Yépez, 1948) | 54 | Rhinergasilus piranhus | 1.8 | 2 (1–2) | 0.04 ± 0.04 (0–2) |
| Coptodon rendalli (Boulenger, 1897) | 54 | Rhinergasilus piranhus | 3.7 | 2 (1–2) | 0.07 ± 0.05 (0–2) |
| Psalidodon bockmanni (Vari and Castro, 2007) | 142 | Rhinergasilus piranhus | 10 | 5.8 ± 1.8 (1–25) | 0.6 ± 0.2 (0–25) |
| 3.5 | 3.6 ± 1.6 (1–9) | 0.1 ± 0.07 (0–9) | |||
| Serrasalmus maculatus Kner, 1858 | 11 | Gamispatulus schizodontis Thatcher and Boeger, 1984 | 25 | 1–1 | 0.25 ± 0.1 (0–1) |
MA, average abundance of infestation; MI, mean intensity of infestation; N, number of fish analysed; P%, prevalence in percentage; R, range of parasites; s.e., standard error.
Calculations were made following the recommendations of Bush et al. (1997).