Dataset Information

Geography, phylogeny and host switch drive the coevolution of parasitic Gyrodactylus flatworms and their hosts.

ABSTRACT:

Background

Gyrodactylus is a lineage of monogenean flatworm ectoparasites exhibiting many features that make them a suitable model to study the host-parasite coevolutionary dynamics. Previous coevolutionary studies of this lineage mainly relied on low-power datasets (a small number of samples and a single molecular marker) and (now) outdated algorithms.

Methods

To investigate the coevolutionary relationship of gyrodactylids and their fish hosts in high resolution, we used complete mitogenomes (including two newly sequenced Gyrodactylus species), a large number of species in the single-gene dataset, and four different coevolutionary algorithms.

Results

The overall coevolutionary fit between the parasites and hosts was consistently significant. Multiple indicators confirmed that gyrodactylids are generally highly host-specific parasites, but several species could parasitize either multiple (more than 5) or phylogenetically distant fish hosts. The molecular dating results indicated that gyrodactylids tend to evolve towards high host specificity. Speciation by host switch was identified as a more important speciation mode than co-speciation. Assuming that the ancestral host belonged to Cypriniformes, we inferred four major host switch events to non-Cypriniformes hosts (mostly Salmoniformes), all of which occurred deep in the evolutionary history. Despite their relative rarity, these events had strong macroevolutionary consequences for gyrodactylid diversity. For example, in our dataset, 57.28% of all studied gyrodactylids parasitized only non-Cypriniformes hosts, which implies that the evolutionary history of more than half of all included lineages could be traced back to these major host switch events. The geographical co-occurrence of fishes and gyrodactylids determined the host use by these gyrodactylids, and geography accounted for most of the phylogenetic signal in host use.

Conclusions

Our findings suggest that the coevolution of Gyrodactylus flatworms and their hosts is largely driven by geography, phylogeny, and host switches.

SUBMITTER: Lei HP

PROVIDER: S-EPMC10825989 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature

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Publications

Geography, phylogeny and host switch drive the coevolution of parasitic Gyrodactylus flatworms and their hosts.

Lei Hong-Peng HP Jakovlić Ivan I Zhou Shun S Liu Xiang X Yan Chuan C Jin Xiao X Wang Bo B Li Wen-Xiang WX Wang Gui-Tang GT Zhang Dong D

Parasites & vectors 20240130 1

<h4>Background</h4>Gyrodactylus is a lineage of monogenean flatworm ectoparasites exhibiting many features that make them a suitable model to study the host-parasite coevolutionary dynamics. Previous coevolutionary studies of this lineage mainly relied on low-power datasets (a small number of samples and a single molecular marker) and (now) outdated algorithms.<h4>Methods</h4>To investigate the coevolutionary relationship of gyrodactylids and their fish hosts in high resolution, we used complete ...[more]

PMID: 38291495

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Dataset Information

Geography, phylogeny and host switch drive the coevolution of parasitic Gyrodactylus flatworms and their hosts.

Background

Methods

Results

Conclusions

Publications

Geography, phylogeny and host switch drive the coevolution of parasitic Gyrodactylus flatworms and their hosts.

Similar Datasets

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