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Estudos evolutivos em Loricariidae (Ostariophysi: Siluriformes)

by Gabriel de Silva

Institution: Universidade Estadual Paulista
Department:
Degree:
Year: 2017
Keywords: Diversificao; Filogenia molecular; Captura de cabeceira; DEC model
Posted: 2/1/2018 12:00:00 AM
Record ID: 2163505
Full text PDF: http://hdl.handle.net/11449/148572


Abstract

O principal objetivo desse estudo estimar uma filognia molecular de Hypostominae, um grande grupo de bagres que est amplamente distribudo sobre a Amrica do sul, para estimar a origem de seus maiores clados no tempo e espao, e demonstrar o papel das capturas de cabeceira sobre os padres de diversificao desses txons. Ns usamos o mtodo Bayesiano para estimar uma filogenia calibrada com o tempo com 220 espcies de Hypostominae, usando dois genes mitocondriais e quatro genes nucleares, ns usamos uma analise de biogeografia paramtrica (modelos DEC e DECj) para estimar a rea geogrfica ancestral, para inferir a rota de colonizao e distribuio desses txons. Hypostominae est composto por dez clados, e nossa filogenia calibrada com o tempo e nossa estimativa usando rea ancestral indica uma origem de Hypostominae durante o mdio Eoceno na rea ancestral correspondente a rea atual em que esto as drenagens costeiras do Pacifico, bacia do rio Madalena, Bacia Amaznica, Bacia do rio Orinoco, e drenagens costeiras das Guianas. As especiaes em Hypostominae coincidem com importantes eventos geolgicos na Amrica do Sul.Advisors/Committee Members: Oliveira, Claudio de [UNESP], Universidade Estadual Paulista (UNESP).

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