Effects of water pollution and river fragmentation on population genetic structure of invasive mosquitofish
We analyzed variation at the GPI-2 locus and eleven microsatellite loci of eastern mosquitofish Gambusia holbrooki populations introduced to the Ebro River (Spain), sampling above and below a dam (Flix Reservoir) where severe chronic pollution has been well documented. Allele frequency changes at the GPI-2 locus in the sites nearest to the polluted sediments agree with previous results from studies in mercury-exposed populations of this highly invasive fish. Genetic distinction of the mosquitofish collected close to the polluted sediments was detected at the GPI locus but also at the presumptive neutral microsatellite loci. Recent migration rates estimated from microsatellites indicated that around 30% of fish collected in a specific location were immigrants from upstream and downstream sources. Such high migration rates probably contribute to the mosquitofish's invasive success and suggest that the consequences on the mosquitofish regional genetic structured of high levels of water toxicants could be mediated by immigration from other sites, but the effect of pollutants on local diversity might be higher than observed here.
504 - Threats to the environment
Is part of
Science of the Total Environment
Díez-del-Molino, David, Emili García-Berthou, Rosa-Maria Araguas, Carles Alcaraz, Oriol Vidal, Nuria Sanz, and Jose-Luis García-Marín. 2018. "Effects Of Water Pollution And River Fragmentation On Population Genetic Structure Of Invasive Mosquitofish". Science Of The Total Environment 637-638: 1372-1382. Elsevier BV. doi:10.1016/j.scitotenv.2018.05.003.
Grant agreement number
MICINN/Programa Nacional de Proyectos de Investigación Fundamental/CGL2009-12877-C02/ES/Invasibilidad de ríos por peces introducidos: estructura genética de poblaciones introducidas de Gambusia holbrooki/
MINECO/Programa Estatal de I+D+I orientada a los retos de la sociedad/CGL2016-80820-R/ES/Evaluación de los efectos directos e indirectos del cambio global sobre la ictiofauna nativa fluvial/
MINECO/Programa Estatal de I+D+I orientada a los retos de la sociedad/PCIN-2016-168/ES/Between Scylla and Charybdis: managing connectivity for freshwater fish/ODYSSEUS
Aigües Marines i Continentals
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