Sex and genetic structure across age groups in populations of the European marine invasive mollusc, Crepidula fornicata L. (Gastropoda)

摘要: In long-lived species, variance in allele frequencies over time may vary according to the number of generations con- tributing progeny. Here, we investigate temporal stability genetic diversity and structure relation sex age introduced populations Crepidula fornicata , an exotic gastropod that successfully invaded Europe . This protandrous species has potential change from male female not only age, but also local ratio (social environment). mechanism adjust reproduction efficiency across different cohorts thus decrease likelihood drift following generations. Based on crude demographic anal- ysis two spatially closed French populations, demonstrate recruitment is discontinuous. Although timing both have a similar char- acterized by distributions males females changing Using five microsatellite loci, show display homogeneity indices groups examined. Our results highlight social control C. strong implications maintenance high enhancing breeding several at each reproductive season. © 2007 The Linnean Society London, Biological Journal 2007, 90 365-374. ADDITIONAL KEYWORDS: - microsatellites reversal.