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Phylogeography of the Guinea multimammate mouse (Mastomys erythroleucus): a case study for Sahelian species in West Africa Inra
Brouat, C.; Tatard, C.; Bâ, K.; Cosson, J.F.; Dobigny, G.; Fichet-Calvet, E.; Granjon, L.; Lecompte, E; Loiseau, A.; Mouline, C.; Piry, S.; Duplantier, J.M..
Aim : To investigate the phylogeographical structure of the Guinea multimammate mouse, Mastomys erythroleucus (Temminck, 1853), a widespread murid rodent in sub-Saharan (Sahel and Sudan) savannas, for a better understanding of the impacts of geographical and historical factors on the evolutionary history of this species, in the context of the growing database of phylogeographical studies of African savanna mammal species. Location Sahel and Sudan savannas, Africa. Methods : We sequenced the whole cytochrome b gene in 211 individuals from 59 localities distributed from Senegal to Ethiopia. Sequence data were analysed using both phylogenetic (several rooted tree-construction methods, median-joining networks) and population genetic methods (spatial analyses...
Tipo: Journal Article Palavras-chave: PHYLOGEOGRAPHIE; SAVANE AFRICA; MASTOMYS ERYTHROLEUCUS; MTDNA; PHYLOGEOGRAPHY; QUATERNARY HISTORY; RODENT; SAVANNA; SUB-SAHARA.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010607a2bef&uri=/notices/prodinra1/2010/12/
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Population genetic structure of two ecologically distinct multimammate rats : the commensal Mastomys natalensis and the wild Mastomys erythroleucus in Southeastern Senegal Inra
Brouat, C.; Loiseau, A.; Kane, M.; Ba, K.; Duplantier, J.M..
Using the same set of microsatellite markers, we compared the population genetic structure of two Mastomys species, one being exclusively commensal in southeastern Senegal, and the other being continuously distributed outside villages in this region. Both species were sampled in the same landscape context and at the same spatial scale. According to the expectations based on the degree of habitat patchiness (which is higher for commensal populations in this rural area), genetic diversity was lower and genetic differentiation was higher in commensal populations of Mastomys natalensis than in wild populations of Mastomys erythroleucus. Contrasting estimates of effective dispersal and current migration rates corroborates previous data on differences in social...
Tipo: Journal Article Palavras-chave: COMMENSAL HABITAT; GENETIC STRUCTURE; HABITAT PATCHINESS; MASTOMYS; MICROSATELLITE; RODENT.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200852f4a992&uri=/notices/prodinra1/2009/01/
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Population genetic structure of two ecologically distinct multimammate rats: the commensal Mastomys natalensis and the wild Mastomys erythroleucus in southeastern Senegal Inra
Brouat, C.; Loiseau, A.; Kane, M.; Ba, K.; Duplantier, J.M..
Using the same set of microsatellite markers, we compared the population genetic structure of two Mastomys species, one being exclusively commensal in southeastern Senegal, and the other being continuously distributed outside villages in this region. Both species were sampled in the same landscape context and at the same spatial scale. According to the expectations based on the degree of habitat patchiness (which is higher for commensal populations in this rural area), genetic diversity was lower and genetic differentiation was higher in commensal populations of Mastomys natalensis than in wild populations of Mastomys erythroleucus. Contrasting estimates of effective dispersal and current migration rates corroborates previous data on differences in social...
Tipo: Journal Article Palavras-chave: HABITAT COMMENSAL; STRUCTURE GENETIQUE; FRAGMENTATION DE L'HABITAT; MASTOMYS; MICROSATELLITE COMMENSAL HABITAT; GENETIC STRUCTURE; HABITAT PATCHINESS; RODENT.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200937fec4f6&uri=/notices/prodinra1/2010/08/
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Stress and demographic decline: a potential effect mediated by impairment of reproduction and immune function in cyclic vole populations Inra
Charbonnel, N.; Chaval, Y.; Berthier, K.; Deter, J.; Morand, S.; Palme, R.; Cosson, J.F..
The stress response is initially adaptive, operating to maintain homeostasis. However, chronic long-term exposure to stressors may have detrimental effects. We proposed that chronic stress may be a major factor in demographic vole cycles, inducing decline in high-density populations. We monitored four populations of the fossorial water vole Arvicola scherman, which undergo pluriannual demographic cycles in the Jura Mountains (France). Sampling was conducted during the high densities and the decline. We measured fecal corticosterone metabolites (FCMs) to assess stress levels and injected phytohemagglutinin to estimate the cell-mediated immune response. We demonstrated that stress levels increase between the high densities and the decline in most of the vole...
Tipo: Journal Article Palavras-chave: DECLIN DEMOGRAPHIQUE; CORTICOSTERONE  ; RODENT; DEMOGRAPHIC DECLINE; STRESS; POPULATION DYNAMICS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009776ecbf8&uri=/notices/prodinra1/2009/03/
Registros recuperados: 4
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