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Invasive cyprinid fish in Europe originate from the single introduction of an admixed source population followed by a complex pattern of spread.

Simon A, Britton R, Gozlan R, van Oosterhout C, Volckaert FA, Hänfling B - PLoS ONE (2011)

Bottom Line: A highly invasive freshwater fish, it is currently found in at least 32 countries outside its native range.Based on coalescent theory, all introduced and some native populations showed a relative excess of nucleotide diversity compared to haplotype diversity.Furthermore, it was preceded by, or associated with, the admixture of genetically diverse source populations that may have augmented its invasive-potential.

View Article: PubMed Central - PubMed

Affiliation: Evolutionary Biology Group, Department of Biological Sciences, University of Hull, Hull, United Kingdom. a.simon@2007.hull.ac.uk

ABSTRACT
The Asian cyprinid fish, the topmouth gudgeon (Pseudorasbora parva), was introduced into Europe in the 1960s. A highly invasive freshwater fish, it is currently found in at least 32 countries outside its native range. Here we analyse a 700 base pair fragment of the mitochondrial cytochrome b gene to examine different models of colonisation and spread within the invasive range, and to investigate the factors that may have contributed to their invasion success. Haplotype and nucleotide diversity of the introduced populations from continental Europe was higher than that of the native populations, although two recently introduced populations from the British Isles showed low levels of variability. Based on coalescent theory, all introduced and some native populations showed a relative excess of nucleotide diversity compared to haplotype diversity. This suggests that these populations are not in mutation-drift equilibrium, but rather that the relative inflated level of nucleotide diversity is consistent with recent admixture. This study elucidates the colonisation patterns of P. parva in Europe and provides an evolutionary framework of their invasion. It supports the hypothesis that their European colonisation was initiated by their introduction to a single location or small geographic area with subsequent complex pattern of spread including both long distance and stepping-stone dispersal. Furthermore, it was preceded by, or associated with, the admixture of genetically diverse source populations that may have augmented its invasive-potential.

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Related in: MedlinePlus

Plot of the first and second axis of a multidimensional scaling analysis based on pairwise FST values among populations.Size of symbols is proportional to the nucleotide diversity of populations. Native populations are colour coded according to Table 1.
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pone-0018560-g006: Plot of the first and second axis of a multidimensional scaling analysis based on pairwise FST values among populations.Size of symbols is proportional to the nucleotide diversity of populations. Native populations are colour coded according to Table 1.

Mentions: The multidimensional scaling analysis of the FST matrix (Figure 6) showed that most of the invasive populations cluster together with two native populations (CRH and CH). This cluster is surrounded by the remaining native populations and two introduced populations (EB and SWS). Overall, there appears to be a pattern that nucleotide diversity increases towards the centre of the plot, i.e. intermediate populations have the highest nucleotide diversity, which again indicates that these populations (invasives and the samples from the river Hai He) are genetically admixed.


Invasive cyprinid fish in Europe originate from the single introduction of an admixed source population followed by a complex pattern of spread.

Simon A, Britton R, Gozlan R, van Oosterhout C, Volckaert FA, Hänfling B - PLoS ONE (2011)

Plot of the first and second axis of a multidimensional scaling analysis based on pairwise FST values among populations.Size of symbols is proportional to the nucleotide diversity of populations. Native populations are colour coded according to Table 1.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3108587&req=5

pone-0018560-g006: Plot of the first and second axis of a multidimensional scaling analysis based on pairwise FST values among populations.Size of symbols is proportional to the nucleotide diversity of populations. Native populations are colour coded according to Table 1.
Mentions: The multidimensional scaling analysis of the FST matrix (Figure 6) showed that most of the invasive populations cluster together with two native populations (CRH and CH). This cluster is surrounded by the remaining native populations and two introduced populations (EB and SWS). Overall, there appears to be a pattern that nucleotide diversity increases towards the centre of the plot, i.e. intermediate populations have the highest nucleotide diversity, which again indicates that these populations (invasives and the samples from the river Hai He) are genetically admixed.

Bottom Line: A highly invasive freshwater fish, it is currently found in at least 32 countries outside its native range.Based on coalescent theory, all introduced and some native populations showed a relative excess of nucleotide diversity compared to haplotype diversity.Furthermore, it was preceded by, or associated with, the admixture of genetically diverse source populations that may have augmented its invasive-potential.

View Article: PubMed Central - PubMed

Affiliation: Evolutionary Biology Group, Department of Biological Sciences, University of Hull, Hull, United Kingdom. a.simon@2007.hull.ac.uk

ABSTRACT
The Asian cyprinid fish, the topmouth gudgeon (Pseudorasbora parva), was introduced into Europe in the 1960s. A highly invasive freshwater fish, it is currently found in at least 32 countries outside its native range. Here we analyse a 700 base pair fragment of the mitochondrial cytochrome b gene to examine different models of colonisation and spread within the invasive range, and to investigate the factors that may have contributed to their invasion success. Haplotype and nucleotide diversity of the introduced populations from continental Europe was higher than that of the native populations, although two recently introduced populations from the British Isles showed low levels of variability. Based on coalescent theory, all introduced and some native populations showed a relative excess of nucleotide diversity compared to haplotype diversity. This suggests that these populations are not in mutation-drift equilibrium, but rather that the relative inflated level of nucleotide diversity is consistent with recent admixture. This study elucidates the colonisation patterns of P. parva in Europe and provides an evolutionary framework of their invasion. It supports the hypothesis that their European colonisation was initiated by their introduction to a single location or small geographic area with subsequent complex pattern of spread including both long distance and stepping-stone dispersal. Furthermore, it was preceded by, or associated with, the admixture of genetically diverse source populations that may have augmented its invasive-potential.

Show MeSH
Related in: MedlinePlus