Table 2.
Parasites from 30 specimens of E. ongus from the Thousand Islands sampled in 2018, including prevalence (P (%)), intensity (I), mean intensity (mI), mean abundance (mA), and diversity indices
| Parasite/parasitological index | Stage | P (%) | mI | (I) | mA |
|---|---|---|---|---|---|
| Ectoparasites | |||||
| Pseudorhabdosynochus sp. (M)*** | Adult | 23.3 | 23.0 | 2–83 | 5.4 |
| Alcirona sp. (Cr)*** | Adult | 50.0 | 2.1 | 1–7 | 1.0 |
| Caligus acanthopagri (Cr)* | Adult | 16.7 | 1.0 | 2 | 0.2 |
| Isopoda indet. (Cr) | Adult | 13.3 | 1.0 | 1–3 | 0.1 |
| Gnathiidae indet. (Cr)*** | Larval | 43.3 | 1.4 | 1–3 | 0.6 |
| Endoparasites | |||||
| Cainocreadium epinepheli (D)* | Adult | 10.0 | 4.3 | 1–8 | 8.0 |
| Gyliauchen cf. nahaensis (D)** | Adult | 16.7 | 1.6 | 1–4 | 0.3 |
| Prosorhynchus sp. (D)* | Larval | 6.7 | 1.0 | 1 | 0.1 |
| Hysterothylacium sp. (N)*** | Larval | 20.0 | 1.5 | 1–3 | 0.3 |
| Philometra epinepheli (N)*** | Adult | 3.3 | 1.0 | 1 | 0.0 |
| Philometra sp. (N)* | Adult | 10.0 | 1.3 | 1–2 | 0.1 |
| Nematoda indet. (N)*** | Larval | 3.3 | 2.0 | 1 | 0.1 |
| Parasitological indices | |||||
| Shannon–Wiener index of species diversity (total) | 1.41 | ||||
| Shannon–Wienerindex of species diversity (endoparasites) | 0.54 | ||||
| Berger–Parker index of dominance (total) | 0.62 | ||||
| Berger–Parker index of dominance (endoparasites) | 0.33 | ||||
| Pielou index of eveness (total) | 0.57 | ||||
| Pielou index of evenness (endoparasites) | 0.28 | ||||
| Ecto- to endoparasite ratio | 0.71 | ||||
Cr Crustacea, D Digenea, M Monogenea, N Nematoda
*New host records for E. ongus
**New host record for epinephelids
***Also found in Karimunjawa (Neubert et al. [28])