Review of the metazoan parasites of the economically and ecologically important African sharptooth catfish Clarias gariepinus in Africa: Current status and novel records

Truter, Marliese; Hadfield, Kerry A.; Smit, Nico J.

doi:10.1016/bs.apar.2022.11.001

Cited by 8 publications

(2 citation statements)

References 243 publications

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“…As part of a larger parasitology project, a total of 157 Clarias gariepinus specimens were caught between 2018 and 2020 from ten localities in southern Africa (Figure 1), using various sampling methods: rod and reel, baited longlines, gill nets, and fyke nets (see [82]). This…”

Section: Samplingmentioning

confidence: 99%

Integrative Morphological and Genetic Characterisation of the Fish Parasitic Copepod Ergasilus mirabilis Oldewage & van As, 1987: Insights into Host Specificity and Distribution in Southern Africa

Fikiye,

Smit,

Van As

et al. 2023

Diversity

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Ergasilids are external parasites typically found on the gills and fins of their hosts. In Africa, 19 species of Ergasilus von Nordmann, 1832 are reported. Of those, Ergasilus mirabilis Oldewage & van As, 1987 is one of the least host-specific, with a wide distribution range in southern Africa. As with most species in the genus, genetic data are not available to support the morphological placement of this species within the genus. Specimens representing E. mirabilis were obtained from the gills of Clarias gariepinus (Burchell, 1822) collected from several localities in South Africa and Zambia. Fish were dissected and gills screened using standard techniques. Following a comprehensive morphological study using light and scanning electron microscopy, additional morphological characters are reported. Furthermore, novel data on partial 18S, 28S (rRNA), and COI (mtDNA) gene regions are presented. This is the first integrative study on the morphology of E. mirabilis with supporting genetic data, as well as new distribution records from the KuShokwe Pan in the Phongolo River floodplain and the Vaal River in South Africa, and from the Barotse floodplain in Zambezi River, Zambia. An updated overview is provided for the species of Ergasilus from Africa, including hosts, distribution, and genetic information.

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Section: Samplingmentioning

confidence: 99%

Integrative Morphological and Genetic Characterisation of the Fish Parasitic Copepod Ergasilus mirabilis Oldewage & van As, 1987: Insights into Host Specificity and Distribution in Southern Africa

Fikiye,

Smit,

Van As

et al. 2023

Diversity

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“…Due to their comparatively high host specificity [ 12 ], as well as their direct life cycle (they have no intermediate hosts), “monogeneans” are an important parasitic model for the research of host-parasite coevolution [ 13 ]. Gyrodactylus is a speciose monogenean (Gyrodactylidea: Gyrodactylidae) genus comprising around 400—500 species [ 14 , 15 ]. Their distribution is global, they encompass both highly host-specific and generalist species, and they infect a broad range of hosts [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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

Lei,

Jakovlić,

Zhou

et al. 2024

Parasites Vectors

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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. Graphical Abstract

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Endohelminth diversity in the invasive Clarias gariepinus (Burchell, 1822) from two freshwater lakes: Naivasha and Ol’Bolossat, Kenya

Maraganga,

Rindoria,

Rindoria

et al. 2024

Parasitol Res

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Review of the metazoan parasites of the economically and ecologically important African sharptooth catfish Clarias gariepinus in Africa: Current status and novel records

Cited by 8 publications

References 243 publications

Integrative Morphological and Genetic Characterisation of the Fish Parasitic Copepod Ergasilus mirabilis Oldewage & van As, 1987: Insights into Host Specificity and Distribution in Southern Africa

Integrative Morphological and Genetic Characterisation of the Fish Parasitic Copepod Ergasilus mirabilis Oldewage & van As, 1987: Insights into Host Specificity and Distribution in Southern Africa

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

Endohelminth diversity in the invasive Clarias gariepinus (Burchell, 1822) from two freshwater lakes: Naivasha and Ol’Bolossat, Kenya

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