Coevolution between Lamellodiscus (Monogenea: Diplectanidae) and Sparidae (Teleostei): the study of a complex host-parasite system |
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| Authors: | Desdevises Yves Morand Serge Jousson Olivier Legendre Pierre |
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| Institution: | Centre de Biologie et ďécologie Tropicale et Méditerranéenne, UMR CNRS 5555, Universitéde Perpignan, 52 Avenue de Villeneuve, F-66860 Perpignan Cedex, France;Département de Sciences Biologiques, Universitéde Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec H3C 3J7, Canada;Station de Zoologie, Département de Zoologie et Biologie Animale, Universitéde Genève, 154, route de Malagnou, CH-1224 Chêne-Bougeries, Switzerland;Centre ďOcéanologie de Marseille, UMR CNRS 6540 DIMAR, UniversitéďAix Marseille II, 13288 Marseille, France;Centre ďOcéanologie de Marseille, UMR CNRS 6540 DIMAR, UniversitéďAix Marseille II, 13288 Marseille, France E-mail:;Centre ďOcéanologie de Marseille, UMR CNRS 6540 DIMAR, UniversitéďAix Marseille II, 13288 Marseille, France E-mail:;Centre ďOcéanologie de Marseille, UMR CNRS 6540 DIMAR, UniversitéďAix Marseille II, 13288 Marseille, France E-mail: |
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| Abstract: | Abstract.— Host-parasite coevolution was studied between Sparidae (Teleostei) fishes and their parasites of the genus Lamellodiscus (Monogenea, Diplectanidae) in the northwestern Mediterranean Sea. Molecular phylogenies were reconstructed for both groups. The phylogenetic tree of the Sparidae was obtained from previously published 16S mitochondrial DNA (mtDNA) sequences associated with new cytochrome-b mtDNA sequences via a "total evidence" procedure. The phylogeny of Lamellodiscus species was reconstructed from 18S rDNA sequences that we obtained. Host-parasite coevolution was studied through different methods: TreeFitter, TreeMap, and a new method, ParaFit. If the cost of a host switch is not assumed to be high for parasites, all methods agree on the absence of widespread cospeciation processes in this host-parasite system. Host-parasite associations were interpreted to be due more to ecological factors than to coevolutionary processes. Host specificity appeared not to be related to host-parasite cospeciation. |
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| Keywords: | 18S rDNA coevolution cytochrome-b mitochondrial DNA fish Lamellodiscus monogenean Sparidae |
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