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A table of other fish species in the sampled localities. All the Norwegian minnow (Phoxinus phoxinus) populations used in the study and the other fish species in the same locality. The species of fish are: AC = Arctic charr (Salvelinus alpinus) BL = bleak (Alburnus alburnus), BR = bream (Abramis brama), BT = brown trout (Salmo trutta), BU = burbot (Lota lota), CC = crucian carp (Carassius carassius), CH = chub (Leuciscus cephalus), EE = eel (Anguilla anguilla), GR = grayling (Thymallus thymallus), PE = perch (Perca fluviatilis), PI = pike (Esox lucius), RU = ruffe (Gymnocephalus cernuus), SS = Siberian sculpin (Cottus poecilopus), VE = vendace (Coregonus albula), WB = white bream (Blicca bjoerkna), WF = European whitefish, SM = smelt (Osmerus eperlanus), ID = ide (Leuciscus idus), DA = dace (Leuciscus leuciscus), 9-SB = nine-spined stickleback (Pungitius pungitius) and 3-SB = tree-spined stickleback (Gasterosteus aculeatus). (DOC 192 kb)

Alignment (FASTA-format) (745Â bp) of cox1 haplotypes used in the present study. (DOCX 22 kb)

Figure of distribution of Gyrodactylus spp. individuals. Distribution of Gyrodactylus spp. individuals in the total dataset of 1278 individual minnows (Phoxinus phoxinus) hosts from 43 populations in Norway. Here the 14 native and 23 stocked populations have been pooled. On the left axis is the probability of occurrence and on right axis is given counts. (DOCX 76 kb)

A table of tests result of demographic bottleneck. All the Norwegian minnow (Phoxinus phoxinus) populations used in the study. Information from tests of demographic bottleneck using Bottleneck 1.2.0.2. (Piry et al. 1999) with the two-phase model (TPM) and the Wilcoxon sign-rank test, and demographic expansion (where the intra-locus k-test identify signals of recent population expansion, while the inter-locus g-test identify signals of more ancient population expansion) using Kg-test (Reich et al. 1999). Footnotes: *Samples used in the rarefaction analysis using EstimateS 8.2.0 (Colwell 2011) where more than 5 Gyrodactylus spp. individuals were observed in the population. This number of observed Gyrodactylus spp. individuals is needed to calculate rarefaction in EstimateS 8.2.0. # None of tests were significant. (DOC 116 kb)