Barros T. auteur aut IRD Ferreira E. auteur aut IRD Rocha R. G. auteur aut IRD Gaubert Philippe auteur aut IRD Bandeira V. auteur aut IRD Souto L. auteur aut IRD Mira A. auteur aut IRD Fonseca C. auteur aut IRD text journalArticle eng text/pdf born digital access In the last three decades, the range of the Egyptian mongoose (Herpestes ichneumon) has increased in the Iberian Peninsula. A panel of microsatellites was used to confront the patterns of genetic diversity of the species with the scenario of its recent northward expansion in its Iberian range. Evidence of substructure and significant genetic differentiation within the studied population were recorded, with a central-northern subpopulation (CNorth) and a southern subpopulation (S). Northward range expansion was supported by the observed allelic frequencies, diversity parameters, and observed heterozygosity of the studied loci, with S showing a higher allelic diversity and a higher number of private alleles than CNorth. Patterns of isolation-by-distance and isolation-by-barrier as a result of the Tagus River were demonstrated, suggesting that the river acted as a semi-permeable barrier, possibly leading to genetic differentiation of the studied population. The observed individuals from CNorth in southern locations and individuals from S in central/northern areas might comprise evidence for long-range dispersals across the studied range. A bottleneck event after population expansion was supported by a significant heterozygosity deficiency in CNorth, which is in agreement with a scenario of founder events occurring in recently colonized areas after the crossing of the Tagus River. specialized carnivore genetic structure Iberia isolation-by-barrier isolation-by-distance microsatellites range expansion PORTUGAL ESPAGNE 080 118 3 686-697 2016 0024-4066 https://www.documentation.ird.fr/hor/fdi:010067688 10.1111/bij.12743 0024-4066 [F B010067688] https://www.documentation.ird.fr/hor/fdi:010067688 https://www.documentation.ird.fr/intranet/publi/2016/08/010067688.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-09-05 2025-01-24 fdi:010067688 fre