title: Are rapids a barrier for floodplain fishes of the Amazon basin? A demographic study of the keystone floodplain species Colossomamacropomum (Teleostei: Characiformes).
abstract: We investigated demographic history and population structuring of Colossoma macropomum sampled from 14 localities in the Amazon basin and the Bolivian sub-basin; the two basins are separated by a series of 16 rapids. Although genetically differentiated, IMa analyses suggest non-zero bi-directional migration rates, and inter-basin divergence of approximately 17 thousand years ago. Analyses in BEAST indicated that Bolivian C. macropomum has been demographically stable except for a moderate population increase in the last 12 thousand years, while Amazonian C. macropomum has been experiencing demographic growth over the last 350 thousand years, resulting in approximately one order of magnitude increase in coalescent N(e).
authors.affiliation: Universidade Federal do Amazonas (UFAM), Departamento de Ciências Biológicas, Laboratório de Evolução e Genética Animal, Mini Campus ICB, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000 - Coroado, Cep 69.077-000, Manaus, AM, Brazil.
authors.forename: Izeni Pires
authors.initials: IP
authors.lastname: Farias
authors.forename: Juan Pablo
authors.initials: JP
authors.lastname: Torrico
authors.forename: Carmen
authors.initials: C
authors.lastname: García-Dávila
authors.forename: Maria da Conceição Freitas
authors.initials: Mda C
authors.lastname: Santos
authors.forename: Tomas
authors.initials: T
authors.lastname: Hrbek
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Renno
mesh_terms: D000818:Animals; D001499:Bayes Theorem; D001838:Bolivia; D001938:Brazil; D004272:DNA, Mitochondrial / Q000235:genetics; D019143:Evolution, Molecular; D005399:Fishes / Q000235:genetics*; D051456:Gene Flow; D005828:Genetics, Population; D005843:Geography; D016013:Likelihood Functions; D010568:Peru; D010802:Phylogeny; D011156:Population Density; D045483:Rivers; D017422:Sequence Analysis, DNA; D014872:Water Movements
chemical_list: D004272:DNA, Mitochondrial