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Rapid spatial genetic differentiation in an invasive species, the round goby Neogobius melanostomus in the Baltic Sea

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Abstract

We analysed the pattern of genetic differentiation among six newly established (around 10 generations) sites of the round goby (Neogobius melanostomus) in the southern Baltic Sea by means of nine microsatellite loci and in total 183 individuals. All but one site were within 30 km from each other. We found statistically significant genetic differentiation in ten out of 15 comparisons after Bonferroni correction, and since the species is newly introduced this has happened in less than ten generations. The largest genetic differentiation was found between the two most divergent habitats, while sites with a similar habitat were not significantly differentiated. Estimates of gene flow (Nm) were low and ranged from 1.5 to 5.5. A large proportion of individuals were assigned to one site (Puck), suggesting that this site has acted as a source to the other sites.

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Acknowledgments

MB and the genetic analyses were supported by FORMAS. This study is a part of the Swedish program AquaAliens, funded by Swedish EPA with support from the Swedish Board of Fisheries. We thank Åsa Kestrup, Alma Strandmark Michal Skora and the staff at Hel Marine Station for help, and Atis Minde for samples from Latvia. We also thank Sara Bergek, Niklas Kolm and Mare Löhmus for discussions and comments on the ms, and Reija Dufva for doing the labwork.

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Authors and Affiliations

  1. Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, 752 36, Uppsala, Sweden

    Mats Björklund

  2. Department of Systems Ecology, Stockholm University, 106 91, Stockholm, Sweden

    Gustaf Almqvist

  3. Swedish Board of Fisheries, Institute of Coastal Research, Box 109, 740 71, Öregrund, Sweden

    Gustaf Almqvist

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  1. Mats Björklund
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  2. Gustaf Almqvist
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Correspondence to Mats Björklund.

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Björklund, M., Almqvist, G. Rapid spatial genetic differentiation in an invasive species, the round goby Neogobius melanostomus in the Baltic Sea. Biol Invasions 12, 2609–2618 (2010). https://doi.org/10.1007/s10530-009-9669-z

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  • DOI: https://doi.org/10.1007/s10530-009-9669-z

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