Table S1 List of Metazoan Parasite Species Identified in 15 Populations of Squalius Cephalus

FIN1 FIN2 PL1 CZ1 CZ2 CZ3 CZ4 F1 F2 I1 I2 BG1 BG2 E1 Monogenea Gyrodactylus vimbi Schulman, 1953 1 1.67 - 2.86 59.35 13.75 1.33 3 1.33 1 1.75 2.25 39.6 3 2.62 Table S1 List of metazoan parasite species identified in 15 populations of Squalius cephalus in European Rivers. Gyrodactylus lomi Ergens et Gelnar, 1988 - - - 1 3.7 1 - - - 2 - - 2 Gyrodactylus prostae Ergens, 1963 - - - - 2.7 1 - - - 5.6 - - 2.5 - 1.5 Intensity of infection (mean number of metazoan parasites per infected host) for European chub populations. Data on parasite species are from Gyrodactylus gasterostei Gläser, 1974 - - - - - 1.5 1 3 - - - - 3.9 - 2 GyrodactylusSeifertová gracilihamatuset al. (2008). Malmberg, 1964 - - - 1 4 - - 1 - 1 - - - - - Gyrodactylus katharineri Malmberg, 1964* ------2 ------Dactylogyrus vistulae Prost, 1957 - 1.6 - 29.6 6.16 8.13 3.3 2.5 10.69 12.21 1.75 7.82 22.9 8.82 4.61 Dactylogyrus fallax Wagener, 1857 - - - 3 3.17 1.67 ------Dactylogyrus folkmanovae Ergens, 1956 3.61 3.43 - 15.65 14.25 6.29 40.83 3.59 2.38 1.43 2.3 30.8 16.22 - 1 Dactylogyrus prostae Molnár, 1964 1.83 1.64 - - 1.57 4.92 7.24 5 - 5.41 4.12 48.2 - - 29.6 Dactylogyrus nanoides Gussev, 1966 - - - - 3.5 1.61 3.87 3.71 - - - 3.27 - - 1.33 Dactylogyrus vranoviensis Ergens, 1956 - - - - 5.0 1.25 2.69 1.75 - - 1.33 5.52 1.67 - - Dactylogyrus naviculoides Ergens, 1956* ------6 - - - - - Dactylogyrus spp. - - - 3.16 4.5 3.5 7.87 1.5 - 2 - 10.42 2.86 - - Paradiplozoon megan (Bychowsky et Nagibina, 1959) - - - 3.67 - 1 1.5 - 2 4.41 2.55 - - 1 1 Paradiplozoon homoion (Bychowsky et Nagibina, 1959) - - 1 - - 1.5 ------1 2 2.28 Crustacea Lamproglena pulchella Nordmann, 1832 ------1 2 - 1.33 1.87 1.93 3.31 - - Ergasilus sieboldi Nordmann, 1832* - - - - - 1 ------Argulus coregoni Thorell, 1864 1 1.25 ------1 1 - - - - Argulus foliaceus (Linnaeus, 1758)* ------2 - Lernaea sp. juv.* ------1.5 - Hirudinea Piscicola geometra (Linnaeus,1761) - 1 - 2.33 ------Codonobdella truncata Grube, 1873* ------1 - - - - Mollusca Glochidia spp. (larv.) 9.91 13.63 - - 1 1 - - - - 1 12.33 1.33 - - Trematoda Diplostomum sp. larv. 15.95 6.42 8.35 - 1.2 2.43 2.5 2.67 2.75 2 - - - - - Tylodelphys sp. larv. 14.25 6 - - - - 1.5 6 - 1 - - - - - Apharyngostrigea sp. larv.* ------12 - - - - - Rhipidocotyle campanula larv. (Dujardin, 1845) 4.5 43.54 - - - 192.46 - - - - - 142.71 3 - - Ichthyocotylurus platycephalus larv. (Creplin, 1852)* - 2 ------Posthodiplostomum sp. larv. - - 20.43 ------1 - - - Bucephalus polymorphus larv. Baer, 1827 - - - - - 96.23 - - - - - 1 - - - Metagonimus yokogawai larv. Katsurada, 1912* - - - 1.67 ------Apharyngostrigea cornu larv. (Zeder, 1800)* - - - 1 ------Metorchis intermedius larv. Heinemann, 1937 - - 3.15 15.69 ------Paracoenogonimus ovatus larv. Katsurada, 1914* ------3 - - - Sphaerostomum bramae (Müller,1776) - 1 - 8.67 - - - - - 1.2 - - - - - Asymphylodora markewitschi Kulakovskaya, 1947* - - - - - 1.5 ------Asymphylodora imitans (Mühling,1898)* ------1 - - - - - Allocreadium isoporum (Looss,1894) 14.5 28.27 ------2.14 - -