Table 3: Basic epidemiological characteristics: abundance (mean ± SD), intensity of infection (min-max), and prevalence (percentage of infected hosts) of all metazoan parasite groups.

Parasite groupAbundance±SDIntensity of infectionPrevalence (in %)
Before-breeding

Monogenea49.76±27.978–116100.00
Hirudinea0.10±0.410–26.90
Mollusca0.03±0.190–13.45
Acanthocephala3.97±5.340–2175.86
Digenea71.83±76.790–37896.55
Cestoda2.03±6.740–3627.59
Nematoda0.10±0.310–110.34

Breeding

Monogenea42.61±48.460–18690.32
Hirudinea0.03±0.180–13.23
Mollusca
Acanthocephala3.52±6.520–3467.74
Digenea58.13±114.30–47487.10
Cestoda0.03±0.180–13.23
Nematoda0.10±0.30–19.68

After-breeding

Monogenea92.73±59.111–234100.00
Hirudinea0.30±0.70–320.00
Mollusca0.27±1.460–83.33
Acanthocephala3.60±3.80–1476.67
Digenea14.17±34.040–18056.67
Cestoda0.20±0.550–213.33
Nematoda0.03±0.180–13.33