Table 2.
Morphometric measurements (range followed by the mean, in parentheses, all in μm) for specimens of Gyrodactylus salaris and G. truttae analysed in this study
| Structure | G. salaris ex Oncorhynchus mykiss | G. salaris ex Salvelinus fontinalis | G. salaris ex Salmo trutta | G. truttae ex Salvelinus fontinalis | G. truttae ex Salmo trutta |
|---|---|---|---|---|---|
| (n = 20) | (n = 19) | (n = 4) | (n = 1) | (n = 4) | |
| Hamulus total length (HTL) | 68.0–78.5 (73.8) | 66.9–75.8 (73.2) | 73.8–77.2 (75.3) | 65.1 | 65.3–66.0 (65.7) |
| Hamulus shaft length (HSL) | 44.8–50.1 (47.6) | 43.8 – 52.0 (48.2) | 45.5–49.4 (47.0) | 42.0 | 41.1–42.4 (41.7) |
| Hamulus point length (HPL) | 31.8–42.6 (37.8) | 35.0–41.1 (38.0) | 37.4–38.1 (37.6) | 33.4 | 33.4–34.2 (33.7) |
| Hamulus root length (HRL) | 25.5–30.4 (27.6) | 23.1–29.9 (26.8) | 27.8–28.7 (28.3) | 21.3 | 21.2–22.5 (21.8) |
| Ventral bar total length (VBTL) | 26.3–35.1 (31.3) | 27.8–33.9 (31.2) | 30.8–34.1 (31.7) | 31.0 | 26.8–29.6 (28.1) |
| Ventral bar membrane length (VBMBL) | 13.7–21.8 (17.6) | 14.4–23.9 (17.5) | 15.6–18.8 (17.2) | 19.2 | 15.1–18.0 (16.4) |
| Ventral bar total width (VBTW) | 26.6–36.0 (31.5) | 27.7–35.3 (32.1) | 30.0–32.5 (31.0) | 31.7 | 28.5–32.5 (30.8) |
| Ventral bar median length (VBML) | 8.1–13.3 (10.1) | 6.5–13.6 (10.5) | 8.5–13.6 (10.3) | 9.2 | 8.5 – 10.6 (9.1) |
| Marginal hook total length (MHTL) | 37.8–43.6 (40.4) | 36.9–43.8 (40.4)a | 38.3–41.0 (39.8) | 29.4 | 30.0–30.7 (30.3) |
| Marginal hook shaft length (MHSHL) | 30.5–35.7 (32.7) | 29.0–36.1 (33.0)a | 31.6–33.6 (32.5) | 24.7 | 23.9–24.5 (24.1) |
| Marginal hook sickle length (MHSL) | 7.3 – 8.5 (8.0) | 7.2–8.7 (8.0) | 7.7–8.1 (8.0) | 6.6 | 6.4–6.7 (6.6) |
a Marginal hook total length (MHTL) and Marginal hook sickle length (MHSL) only available from 17 specimens