Temporal genetic dynamics among mosquitofish (Gambusia holbrooki) populations in invaded watersheds
نویسندگان
چکیده
منابع مشابه
Genetic and demographic responses of mercury-exposed mosquitofish (Gambusia holbrooki) populations: temporal stability and reproductive components of fitness.
Two previous mesocosm studies showed changes in glucosephosphate isomerase-2 (Gpi-2) allele frequencies in mosquitofish populations exposed to mercury for 111 d or two years. A previous selection component analysis of single-generation populations exposed for 111 d to 18 microg/L Hg suggested that female sexual selection and fecundity selection could contribute to changes in Gpi-2 allele freque...
متن کاملPredictors of male insemination success in the mosquitofish (Gambusia holbrooki)
Identifying targets of selection is key to understanding the evolution of sexually selected behavioral and morphological traits. Many animals have coercive mating, yet little is known about whether and how mate choice operates when these are the dominant mating tactic. Here, we use multivariate selection analysis to examine the direction and shape of selection on male insemination success in th...
متن کاملGene Flow and Maintenance of Genetic Diversity in Invasive Mosquitofish (Gambusia holbrooki)
Genetic analyses contribute to studies of biological invasions by mapping the origin and dispersal patterns of invasive species occupying new territories. Using microsatellite loci, we assessed the genetic diversity and spatial population structure of mosquitofish (Gambusia holbrooki) that had invaded Spanish watersheds, along with the American locations close to the suspected potential source ...
متن کاملDemographic effects on the use of genetic options for the control of mosquitofish, Gambusia holbrooki.
This study tests the sensitivity of genetically based pest control options based on sex ratio distortion to intra- and intersexual aggressive interactions that affect male and female survival and fitness. Data on these interactions and their impacts were gathered for the mosquitofish Gambusia holbrooki (Poeciliidae), a promiscuous species with a strongly male-biased operational sex ratio and we...
متن کاملMaternal effects on offspring size and number in mosquitofish, Gambusia holbrooki
Given a trade-off between offspring size and number, all mothers are predicted to produce the same optimal-sized offspring in a given environment. In many species, however, larger and/or older mothers produce bigger offspring. There are several hypotheses to explain this but they lack strong empirical support. In organisms with indeterminate growth, there is the additional problem that maternal...
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ژورنال
عنوان ژورنال: Biological Invasions
سال: 2016
ISSN: 1387-3547,1573-1464
DOI: 10.1007/s10530-016-1055-z