Limits...
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.

Show MeSH

Related in: MedlinePlus

Medium joining network of cytb haplotypes from native and introduced populations of Pseudorasbora parva, excluding H22, H23 & H24.Adjacent haplotypes are connected through a single point mutation. Each circle represents a single haplotype and its diameter is proportional to the number of individuals with that haplotype. The colour codes represent the locations in which the haplotype is found, filled cricles (•) represents unsampled haplotypes.
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3108587&req=5

pone-0018560-g004: Medium joining network of cytb haplotypes from native and introduced populations of Pseudorasbora parva, excluding H22, H23 & H24.Adjacent haplotypes are connected through a single point mutation. Each circle represents a single haplotype and its diameter is proportional to the number of individuals with that haplotype. The colour codes represent the locations in which the haplotype is found, filled cricles (•) represents unsampled haplotypes.

Mentions: Pie charts represent the geographical distribution of major mtDNA lineages (see Figure 4). Lineage 1 = white, Lineage 2 = black, lineage 3 = grey. See Table 1 for population codes. Large pie charts represent samples collected in this study,small pie charts samples from Liu et al. 2010.


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)

Medium joining network of cytb haplotypes from native and introduced populations of Pseudorasbora parva, excluding H22, H23 & H24.Adjacent haplotypes are connected through a single point mutation. Each circle represents a single haplotype and its diameter is proportional to the number of individuals with that haplotype. The colour codes represent the locations in which the haplotype is found, filled cricles (•) represents unsampled haplotypes.
© Copyright Policy
Related In: Results  -  Collection

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

pone-0018560-g004: Medium joining network of cytb haplotypes from native and introduced populations of Pseudorasbora parva, excluding H22, H23 & H24.Adjacent haplotypes are connected through a single point mutation. Each circle represents a single haplotype and its diameter is proportional to the number of individuals with that haplotype. The colour codes represent the locations in which the haplotype is found, filled cricles (•) represents unsampled haplotypes.
Mentions: Pie charts represent the geographical distribution of major mtDNA lineages (see Figure 4). Lineage 1 = white, Lineage 2 = black, lineage 3 = grey. See Table 1 for population codes. Large pie charts represent samples collected in this study,small pie charts samples from Liu et al. 2010.

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