Temporally consistent species differences in parasite infection but no evidence for rapid parasite-mediated speciation in Lake Victoria cichlid fish.

Autor: Gobbin TP; Division of Aquatic Ecology & Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.; Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, the Netherlands.; Department of Fish Ecology and Evolution, Centre of Ecology, Evolution and Biogeochemistry, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland., Vanhove MPM; Research Group Zoology: Biodiversity & Toxicology, Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium.; Department of Biology, Laboratory of Biodiversity and Evolutionary Genomics, University of Leuven, Leuven, Belgium.; Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic.; Zoology Unit, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland., Pariselle A; ISEM, CNRS, Université de Montpellier, IRD, Montpellier, France.; Faculty of Sciences, Laboratory of Biodiversity, Ecology and Genome, Mohammed V University in Rabat, Rabat, Morocco., Groothuis TGG; Department of Fish Ecology and Evolution, Centre of Ecology, Evolution and Biogeochemistry, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland., Maan ME; Department of Fish Ecology and Evolution, Centre of Ecology, Evolution and Biogeochemistry, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland., Seehausen O; Division of Aquatic Ecology & Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.; Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, the Netherlands.
Jazyk: angličtina
Zdroj: Journal of evolutionary biology [J Evol Biol] 2020 May; Vol. 33 (5), pp. 556-575. Date of Electronic Publication: 2020 Apr 05.
DOI: 10.1111/jeb.13615
Abstrakt: Parasites may have strong eco-evolutionary interactions with their hosts. Consequently, they may contribute to host diversification. The radiation of cichlid fish in Lake Victoria provides a good model to study the role of parasites in the early stages of speciation. We investigated patterns of macroparasite infection in a community of 17 sympatric cichlids from a recent radiation and 2 older species from 2 nonradiating lineages, to explore the opportunity for parasite-mediated speciation. Host species had different parasite infection profiles, which were only partially explained by ecological factors (diet, water depth). This may indicate that differences in infection are not simply the result of differences in exposure, but that hosts evolved species-specific resistance, consistent with parasite-mediated divergent selection. Infection was similar between sampling years, indicating that the direction of parasite-mediated selection is stable through time. We morphologically identified 6 Cichlidogyrus species, a gill parasite that is considered a good candidate for driving parasite-mediated speciation, because it is host species-specific and has radiated elsewhere in Africa. Species composition of Cichlidogyrus infection was similar among the most closely related host species (members of the Lake Victoria radiation), but two more distantly related species (belonging to nonradiating sister lineages) showed distinct infection profiles. This is inconsistent with a role for Cichlidogyrus in the early stages of divergence. To conclude, we find significant interspecific variation in parasite infection profiles, which is temporally consistent. We found no evidence that Cichlidogyrus-mediated selection contributes to the early stages of speciation. Instead, our findings indicate that species differences in infection accumulate after speciation.
(© 2020 The Authors. Journal of Evolutionary Biology published by John Wiley & Sons Ltd on behalf of European Society for Evolutionary.)
Databáze: MEDLINE
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