Host-Specific Monogenea revealing the Biogeographical Contacts of Nearctic Cyprinoid Fish
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| Rok publikování | 2022 |
| Druh | Konferenční abstrakty |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | Introduction Host-specific parasites exhibit close coevolutionary associations with their hosts. They may reflect the biogeographical history and/or contemporarily contacts of their hosts exhibiting disjunctive distribution. Gill parasites of the genus Dactylogyrus (Monogenea) mostly host-specific to cyprinoid fish were used to reveal the historical biogeographical contacts between cyprinoids from North America and Europe and contemporary contacts of leuciscids in North America. Methodology Dactylogyrus parasites were collected from cypriniforms (Leuciscidae and Catostomidae) in the North America. Molecular phylogeny based on three nuclear markers was reconstructed. Mapping of geographical distribution and fish lineages onto phylogenetic tree was performed to investigate the origin of Nearctic Dactylogyrus and host switches of Dactylogyrus between clades of Holarctic cyprinoids. Results Host-specific Dactylogyrus parasitizing Nearctic cypriniforms formed two independent clades with different origins likely associated with different historical routes of cyprinoid dispersion to the North America. In the Nearctic region, Dactylogyrus switched non-leuciscid fishes. Dactylogyrus species did not reflect the phylogenetic relationships among leuciscid clades. We showed that the historical contacts between European and North American leuciscids were accompanied by the host switching of Dactylogyrus. Conclusion We highlight the role of host-specific monogeneans serving as a supplementary tool to reveal the historical intercontinental and intracontinental contacts between freshwater fish exhibiting disjunctive distribution. |
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