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The most vagile host as the main determinant of population connectivity in marine macroparasites ArchiMer
Feis, Marieke E.; Thieltges, David W.; Olsen, Jeanine L.; De Montaudouin, Xavier; Jensen, K. Thomas; Bazairi, Hocein; Culloty, Sarah C.; Luttikhuizen, Pieternella C..
Although molecular ecology of macroparasites is still in its infancy, general patterns are beginning to emerge, e.g. that the most vagile host in a complex life cycle is the main determinant of the population genetic structure of their parasites. This insight stems from the observation that populations of parasites with only freshwater hosts are more structured than those with terrestrial or airborne hosts. Until now, the same has not been tested for marine systems, where, in theory, a fully marine life cycle might sustain high dispersal rates because of the absence of obvious physical barriers in the sea. Here, we tested whether a marine trematode parasite that utilises migratory birds exhibited weaker population genetic structure than those whose life...
Tipo: Text Palavras-chave: Marine ecology; Population genetics; Parasite; Host parasite dynamics; Trematode; Invertebrates; Gymnophallus choledochus; Bucephalus minimus.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00375/48625/49417.pdf
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Global invasion genetics of two parasitic copepods infecting marine bivalves ArchiMer
Feis, Marieke E.; Goedknegt, M. Anouk; Arzul, Isabelle; Chenuil, Anne; Den Boon, Onno; Gottschalck, Leo; Kondo, Yusuke; Ohtsuka, Susumu; Shama, Lisa N. S.; Thieltges, David W.; Wegner, K. Mathias; Luttikhuizen, Pieternella C..
Invasive species, and especially invasive parasites, represent excellent models to study ecological and evolutionary mechanisms in the wild. To understand these processes, it is crucial to obtain more knowledge on the native range, invasion routes and invasion history of invasive parasites. We investigated the consecutive invasions of two parasitic copepods (Mytilicola intestinalis and Mytilicola orientalis) by combining an extensive literature survey covering the reported putative native regions and the present-day invaded regions with a global phylogeography of both species. The population genetic analyses based on partial COI sequences revealed significant population differentiation for M. orientalis within the native region in Japan, while introduced...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00514/62569/66922.pdf
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Isotopic discrimination in helminths infecting coral reef fishes depends on parasite group, habitat within host, and host stable isotope value ArchiMer
Riekenberg, Philip M.; Briand, Marine J; Moléana, Thibaud; Sasal, Pierre; Van Der Meer, Marcel T. J.; Thieltges, David W.; Letourneur, Yves.
Stable isotopes of carbon and nitrogen characterize trophic relationships in predator–prey relationships, with clear differences between consumer and diet (discrimination factor Δ13C and Δ15N). However, parasite–host isotopic relationships remain unclear, with Δ13C and Δ15N remaining incompletely characterized, especially for helminths. In this study, we used stable isotopes to determine discrimination factors for 13 parasite–host pairings of helminths in coral reef fish. Differences in Δ15N values grouped according to parasite groups and habitat within the host with positive Δ15N values observed for trematodes and nematodes from the digestive tract and variable Δ15N values observed for cestodes and nematodes from the general cavity. Furthermore, Δ13C...
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Ano: 2021 URL: https://archimer.ifremer.fr/doc/00682/79431/82031.pdf
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