Population genetics reveals origin and number of founders in a biological invasion

Molecular Ecology
Gentile Francesco FicetolaClaude Miaud

Abstract

Propagule pressure is considered the main determinant of success of biological invasions: when a large number of individuals are introduced into an area, the species is more likely to establish and become invasive. Nevertheless, precise data on propagule pressure exist only for a small sample of invasive species, usually voluntarily introduced. We studied the invasion of the American bullfrog, Rana catesbeiana, into Europe, a species that is considered a major cause of decline for native amphibians. For this major invader with scarce historical data, we used population genetics data (a partial sequence of the mitochondrial cytochrome b gene) to infer the invasion history and to estimate the number of founders of non-native populations. Based on differences between populations, at least six independent introductions from the native range occurred in Europe, followed by secondary translocations. Genetic diversity was strongly reduced in non-native populations, indicating a very strong bottleneck during colonization. We used simulations to estimate the precise number of founders and found that most non-native populations derive from less than six females. This capability of invasion from a very small number of propagules challenge...Continue Reading

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Citations

Apr 11, 2008·Biology Letters·Gentile Francesco FicetolaPierre Taberlet
Jun 26, 2008·Proceedings. Biological Sciences·Kenneth G Ross, D Dewayne Shoemaker
Jul 1, 2009·Molecular Ecology Resources·Mónica RodriguesMargarida Santos-Reis
Jan 6, 2009·Molecular Ecology·John A DarlingJonathan B Geller
Jan 15, 2009·Molecular Ecology·Loren RiesebergNolan Kane
Aug 14, 2012·Molecular Ecology·Guillermo PérezTreena I Burgess
Oct 10, 2012·Molecular Ecology·Yukie KajitaDavid W Weisrock
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Aug 14, 2020·Brazilian Journal of Biology = Revista Brasleira De Biologia·Sana KaramatMajid Mehmood
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