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Genetic characterization of the invasive mosquitofish (Gambusia spp.) introduced to Europe: Population structure and colonization routes

Biological invasions are considered one of the main anthropogenic factors that reduce the abundance of native species. Understanding the patterns of population structure and behavior of introduced species is important to determine invasion sources and pathways, in addition to improving the protective management of native species. Thus, we set out to advance our knowledge about the mosquitofish Gambusia spp., which is an invasive species that was introduced to southern Europe in 1921 to control mosquito populations. We assessed the genetic diversity and population structure of this species at 13 European locations, by screening variation at six microsatellite loci. We also evaluated six American samples (four of G. holbrooki and two of G. affinis) to identify the most likely source of the populations that established in Europe, and to determine whether G. affinis is also present. The results showed that, while there was evidence of recent bottleneck events in a few isolated locations, most introduced populations harbored a considerable amount of gene diversity, probably because of multiple introductions and secondary contacts. Populations displayed strong genetic differentiation that was mainly associated with geographical distance. At least two main routes of colonization of G. holbrooki seem to have occurred in Europe. The first, and more ancient colonization, was consistent with historical records, with the species invading the Iberian Peninsula. A second and more recent colonization probably occurred in Greece and, from there, France. The presence of G. affinis was not detected in any of the European samples

The work was funded by the Spanish Ministry of Education and Science (MEC) research projects CGL2006-11652-C02-02/BOS and CGL2009-12877-C02-02

© Biological Invasions, 2013, vol. 15, núm. 10, p. 2333-2346

Springer Verlag

Author: Sanz Ball-llosera, Núria
Araguas Solà, Rosa M.
Vidal Fàbrega, Oriol
Díez del Molino, David
Fernández Cebrián, Raquel
García Marín, José Luis
Date: 2013 October 1
Abstract: Biological invasions are considered one of the main anthropogenic factors that reduce the abundance of native species. Understanding the patterns of population structure and behavior of introduced species is important to determine invasion sources and pathways, in addition to improving the protective management of native species. Thus, we set out to advance our knowledge about the mosquitofish Gambusia spp., which is an invasive species that was introduced to southern Europe in 1921 to control mosquito populations. We assessed the genetic diversity and population structure of this species at 13 European locations, by screening variation at six microsatellite loci. We also evaluated six American samples (four of G. holbrooki and two of G. affinis) to identify the most likely source of the populations that established in Europe, and to determine whether G. affinis is also present. The results showed that, while there was evidence of recent bottleneck events in a few isolated locations, most introduced populations harbored a considerable amount of gene diversity, probably because of multiple introductions and secondary contacts. Populations displayed strong genetic differentiation that was mainly associated with geographical distance. At least two main routes of colonization of G. holbrooki seem to have occurred in Europe. The first, and more ancient colonization, was consistent with historical records, with the species invading the Iberian Peninsula. A second and more recent colonization probably occurred in Greece and, from there, France. The presence of G. affinis was not detected in any of the European samples
The work was funded by the Spanish Ministry of Education and Science (MEC) research projects CGL2006-11652-C02-02/BOS and CGL2009-12877-C02-02
Format: application/pdf
ISSN: 1387-3547 (versió paper)
1573-1464 (versió electrònica)
Document access: http://hdl.handle.net/10256/14069
Language: eng
Publisher: Springer Verlag
Collection: MICYT/2006-2009/ CGL2006-11652-C02-01/BOS
MICINN/PN 2010-2013/CGL2009-12877-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s10530-013-0456-5
Articles publicats (D-B)
Is part of: © Biological Invasions, 2013, vol. 15, núm. 10, p. 2333-2346
Rights: Tots els drets reservats
Subject: Peixos d’aigua dolça
Freshwater fishes
Gambusia holbrooki -- Genètica
Eastern mosquitofish -- Genetics
Invasions biològiques
Biological invasions
Title: Genetic characterization of the invasive mosquitofish (Gambusia spp.) introduced to Europe: Population structure and colonization routes
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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