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Musilova Z.,Institute Of Animal Physiology And Genetics Av Cr Vvi | Musilova Z.,Czech University of Life Sciences | Musilova Z.,Charles University | Musilova Z.,University of Basel | And 3 more authors.
PLoS ONE | Year: 2013

The headwaters of five large African river basins flow through the Bié Plateau in Angola and still remain faunistically largely unexplored. We investigated fish fauna from the Cuanza and Okavango-Zambezi river systems from central Angola. We reconstructed molecular phylogenies of the most common cichlid species from the region, Tilapia sparrmanii and Serranochromis macrocephalus, using both mitochondrial and nuclear markers. We found evidence for ichthyofaunal contact and gene flow between the Cuanza and Okavango-Zambezi watersheds in the Bié Plateau in central Angola. Waterfalls and rapids also appeared to restrict genetic exchange among populations within the Cuanza basin. Further, we found that the Angolan Serranochromis cichlid fishes represent a monophyletic lineage with respect to other haplochromines, including the serranochromines from the Congo and Zambezi rivers. This study represents an important initial step in a biodiversity survey of this extremely poorly explored region, as well as giving further understanding to species distributions and gene flow both between and within river basins. © 2013 Musilová et al. Source

Musilova Z.,Institute Of Animal Physiology And Genetics Av Cr Vvi | Musilova Z.,Charles University | Musilova Z.,Czech University of Life Sciences | Rican O.,University of South Bohemia | And 4 more authors.
Vertebrate Zoology | Year: 2015

We reconstruct the historical biogeography of cichlid fishes endemic to the trans-Andean region of NW South America. DNA sequences were used to study historical biogeography of the cichlid genera Andinoacara (Cichlasomatini) and Mesoheros (Heroini). Two event-based methodological approaches, parsimony-based Statistical Dispersal-Vicariance Analysis (S-DIVA) and likelihood-based Dispersal-Extinction Cladogenesis (DEC in Lagrange) were used for ancestral-area reconstructions. Molecular clock analysis of the whole group of Neotropical Cichlidae (using mtDNA and nucDNA markers) was calibrated using BEAST by six known cichlid fossils. The historical biogeography of both studied trans-Andean cichlid genera is best explained by a series of vicariance events that fragmented an ancestrally wider distribution. Both genera have a highly congruent vicariant historical biogeography in their shared distribution in the Colombian-Ecuadorian Choco. The Andean uplift and formation of the Central American isthmus strongly impacted the distribution patterns of the freshwater ichtyofauna in the NW Neotropics as suggested by the historical biogeography of the two studied cichlid groups. Despite strong congruence in their historical biogeography the two studied cichlid lineages (part of the tribe Cichlasomatini and Heroini, respectively) have highly different evolutionary substitution rates in the studied mtDNA cytb marker. © Senckenberg Gesellschaft für Naturforschung, 2015. Source

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