The introduction of non-native species has a worldwide long-term tradition, but only a few species are able to establish in the new area. Parasites are also frequently introduced together with their hosts. The North American fish Lepomis gibbosus has established itself in almost all European countries. Seven monogenean parasites were transported with the fish host, moreover, L. gibbosus accepted some of the local parasites.
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Photo R. Blažek