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Colonization history of the Swiss Rhine basin by the bullhead (Cottus gobio): inference under a Bayesian spatially explicit framework

Neuenschwander, Samuel
Largiadèr, Carlo R.
Vonlanthen, Pascal
Published in Molecular Ecology. 2008, vol. 17, no. 3, p. 757-772
Abstract The present distribution of freshwater fish in the Alpine region has been strongly affected by colonization events occurring after the last glacial maximum (LGM), some 20,000 years ago. We use here a spatially explicit simulation framework to model and better understand their colonization dynamics in the Swiss Rhine basin. This approach is applied to the European bullhead (Cottus gobio), which is an ideal model organism to study fish past demographic processes since it has not been managed by humans. The molecular diversity of eight sampled populations is simulated and compared to observed data at six microsatellite loci under an approximate Bayesian computation framework to estimate the parameters of the colonization process. Our demographic estimates fit well with current knowledge about the biology of this species, but they suggest that the Swiss Rhine basin was colonized very recently, after the Younger Dryas some 6600 years ago. We discuss the implication of this result, as well as the strengths and limits of the spatially explicit approach coupled to the approximate Bayesian computation framework.
Keywords Animal MigrationAnimalsBayes TheoremComputer SimulationEcosystemGenetic VariationIctaluridae/geneticsGenetic ModelsRiversSwitzerland
PMID: 18194169
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Research groups Unité d’anthropologie
Envirospace Lab
ISE Pôle Sciences
ISE Pôle Informatique environnementale
ISE Biodiversité
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NEUENSCHWANDER, Samuel et al. Colonization history of the Swiss Rhine basin by the bullhead (Cottus gobio): inference under a Bayesian spatially explicit framework. In: Molecular Ecology, 2008, vol. 17, n° 3, p. 757-772. doi: 10.1111/j.1365-294X.2007.03621.x https://archive-ouverte.unige.ch/unige:2125

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Deposited on : 2009-06-22

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