Figure 1
Map of the study area, with sampling localities marked by red arrows: 1) Gulf of Odessa, Black Sea, Ukraine; 2) Khadzibey Estuary, Ukraine; 3) Lake Kytay, Danube Delta, Ukraine; 4) Lower Danube, Vidin, Bulgaria
Table 1
Number of fish from different localities examined and their standard length (SL, mm)
| Gulf of Odessa | Khadzhibey Estuary | Lake Kytay | Lower Danube | |
|---|---|---|---|---|
| Number | 31 | 37 | 77 | 78 |
| SL; mean ± SD | 90 ± 27.5 | 58 ± 14.9 | 75 ± 20.7 | 66 ± 9.0 |
| SL; min.–max | 30–125 | 38–115 | 50–146 | 50–90 |
Table 2
Parasite component communities of monkey goby (Neogobius fluviatilis) from four localities in its native range (n = number of fish studied, P = prevalence as %, MI = mean intensity with intensity range in brackets, A = mean abundance, S = sporadic infection, NN = not numerous infection, met = metacercariae, pl = plerocercoids, L3 = 3rd stage larvae, ca = cystacanths, gl = glochidia)
| Gulf of Odessa | Khadzibey Estuary | Lake Kytay | Lower Danube | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Parasite taxa | (n=31) | (n=37) | (n=77) | (n=78) | ||||||||
| P | MI | A | P | MI | A | P | MI | A | P | MI | A | |
| Ciliata | ||||||||||||
| Trichodina sp. | 9.7 | S | ||||||||||
| Microspora | ||||||||||||
| Loma acerinae | 7.8 | 4.3 (1–7) | 0.3 | 61.5 | 124 (1–500) | 76.1 | ||||||
| Myxozoa | ||||||||||||
| Kudoa nova | 19.4 | NN | ||||||||||
| Monogenea | ||||||||||||
| Gyrodactylus proterorhini | 3.2 | 1.0 (1) | 0.03 | 2.7 | 1.0 (1) | 0.03 | 16.7 | 9.4 (1–48) | 1.6 | |||
| Cestoda | ||||||||||||
| Ligula pavlovskiipl | 64.9 | 2.2 (1–10) | 1.4 | |||||||||
| Proteocephalus gobiorum | 6.5 | 1.4 (1–3) | 0.1 | |||||||||
| Bothriocephalus scorpii pl | 3.2 | 2.0 (2) | 0.1 | |||||||||
| Digenea | ||||||||||||
| Apophallus sp. met | 28.2 | 2.4 (1–8) | 0.7 | |||||||||
| Cryptocotyle concava met | 2.7 | 3.0 (3) | 0.1 | |||||||||
| Diplostomum sp. met | 20.5 | 1.2 (1–2) | 0.2 | |||||||||
| Metagonimus sp. met | 41.0 | 9.1 (1–51) | 3.7 | |||||||||
| Nicolla skrjabini | 25.6 | 16.7 (1–115) | 4.3 | |||||||||
| Pygidiopsis genata met | 5.4 | 1.0 (1) | 0.1 | |||||||||
| Nematoda | ||||||||||||
| Anguillicoloides crassus L3 | 2.6 | 1.0 (1) | 0.03 | |||||||||
| Contracaecum rudolphii L3 | 1.3 | 1.0 (1) | 0.01 | |||||||||
| Dichelyne minutus | 12.9 | 1.0 (1) | 0.1 | |||||||||
| Eustrongylides excisus L3 | 58.4 | 2.0 (1–7) | 1.2 | 20.5 | 1.8 (1–5) | 0.4 | ||||||
| Hysterothylacium aduncum L3 | 3.2 | 1.0 (1) | 0.03 | |||||||||
| Raphidascaris acus L3 | 14.3 | 2.3 (1–7) | 0.3 | |||||||||
| Acanthocephala | ||||||||||||
| Pomphorhynchus laevis ca | 51.3 | 3.9 (1–15) | 2.0 | |||||||||
| Telosentis exiguus | 6.4 | 2 (1–3) | 0.1 | |||||||||
| Crustacea | ||||||||||||
| Ergasilus sieboldi | 2.6 | 1.5 (1–2) | 0.04 | |||||||||
| Mothocya epimerica | 3.2 | 1.0 (1) | 0.03 | |||||||||
| Bivalvia | ||||||||||||
| Anodonta anatina gl | 1.3 | 1.0 (1) | 0.01 | |||||||||
| Pseudoanodonta complanata gl | 16.7 | 3.6 (1–17) | 0.6 | |||||||||
| Species richness | 8 | 3 | 7 | 11 | ||||||||
| Mean abundance ± SD | 1.3 ± 2.8 | 0.2 ± 0.5 | 1.6 ± 2.1 | 13.5 ± 21.2 | ||||||||
| Intensity of infection (min.–max) | 1–12 | 1–3 | 1–9 | 1–121 | ||||||||