Invasion, dispersion and hybridization of fish associated to river transposition: karyotypic evidence in Astyanax “bimaculatus group” (Characiformes: Characidae)

Peres, Wellington Adriano Moreira; Bertollo, Luiz Antônio Carlos; Buckup, Paulo Andreas; Blanco, Daniel Rodrigues; Kantek, Daniel Luis Zanella; Moreira‐Filho, Orlando

doi:10.1007/s11160-011-9246-2

Cited by 22 publications

(19 citation statements)

References 19 publications

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“…altiparanae from the Grande and A . lacustris from the São Francisco basins correspond to a single biological unit [92]. Recently a review of the Astyanax bimaculatus 'caudal peduncle spot' subgroup of the La Plata and São Francisco basins suggested that two nominal species– A .…”

Section: Discussionmentioning

confidence: 99%

Highlighting Astyanax Species Diversity through DNA Barcoding

et al. 2016

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DNA barcoding has been used extensively to solve taxonomic questions and identify new species. Neotropical fishes are found in a wide variety of shapes and sizes, with a large number of species yet to be described, many of which are very difficult to identify. Characidae is the most species-rich family of the Characiformes, and many of its genera are affected by taxonomic uncertainties, including the widely-distributed, species-rich genus Astyanax. In this study, we present an extensive analysis of Astyanax covering almost its entire area of occurrence, based on DNA barcoding. The use of different approaches (ABGD, GMYC and BIN) to the clustering of the sequences revealed ample consistency in the results obtained by the initial cutoff value of 2% divergence for putative species in the Neighbor-Joining analysis using the Kimura-2-parameter model. The results indicate the existence of five Astyanax lineages. Some groups, such as that composed by the trans-Andean forms, are mostly composed of well-defined species, and in others a number of nominal species are clustered together, hampering the delimitation of species, which in many cases proved impossible. The results confirm the extreme complexity of the systematics of the genus Astyanax and show that DNA barcoding can be an useful tool to address these complexes questions.

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Section: Discussionmentioning

confidence: 99%

Highlighting Astyanax Species Diversity through DNA Barcoding

et al. 2016

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“…Francisco também são sugeridas por estudos genéticos envolvendo espécies de peixes na região dos divisores altimetricamente anômalos (BELLAFRONTE et al, 2010;LUI et al, 2012;PERES et al, 2012). No entanto, estes estudos apontam que nas cabeceiras do Rio São Francisco existem espécies endêmicas que não estão presentes no Rio Grande, o que demonstra que essas ligações foram bastante antigas a ponto de permitir o posterior desenvolvimento de tais espécies.…”

Section: Além Das Evidências Geomorfológicas Antigas Conexões Entre unclassified

Evolução Da Rede De Drenagem E Evidências De Antigas Conexões Entre as Bacias Dos Rios Grande E São Francisco No Sudeste Brasileiro

Rezende

Salgado²,

Castro

2018

Rev. Bras. Geomorfol.

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Resumo:O presente trabalho investigou a evolução da rede de drenagem na alta/média bacia do Rio Grande, com foco em evidências de antigas conexões entre esta bacia e a bacia do Rio São Francisco no sudeste brasileiro. Foi executada a análise conjunta de registros sedimentares, anomalias de drenagem, eixos de soerguimento e dados termocronológicos disponíveis. Feições como um baixo divisor anômalo, um cotovelo de drenagem, uma garganta e um antigo eixo de soerguimento evidenciam que o alto curso do Rio Grande, hoje pertencente à bacia hidrográfi ca do Rio Paraná, encontrava-se previamente direcionado para norte, rumo ao Cráton do São Francisco. O divisor ancestral entre as duas bacias hidrográfi cas coincidia com o eixo soerguido de direção geral NNW-SSE ao longo das intrusões alcalinas Neocretáceas que bordejam a nordeste a Unidade geotectônica Bacia do Paraná. O rompimento do divisor ancestral e a consequente captura fl uvial provavelmente ocorreram após um soerguimento generalizado no Mioceno Médio, que causou a superimposição da drenagem a partir de uma paleosuperfície mais regular e a abertura de depressões. O baixo divisor anômalo na região de Pimenta-MG corresponde a um expressivo registro morfológico do paleovale que conectava as duas bacias atualmente separadas. Taxas médias de incisão de longo-termo foram estimadas em cerca de 10 m/Ma, com base no posicionamento das formações Marília e Itaqueri adjacentes ao médio vale do Rio Grande. Informações sobre o Artigo

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“…A similar well-recorded case occurred when the Piumhi River (with its 22 tributaries) which belonged to the Upper Paraná River basin was entirely transferred to São Francisco River basin after construction of the Furnas hydroelectric power dam [54]. This transposition introduced at list nine species from Upper Paraná River basin to São Francisco River basin [55,56,57,58,59]. However, in general, the impact of transpositions of rivers due to hydroelectric power dams are rarely recorded.…”

Section: Discussionmentioning

confidence: 80%

Knodus moenkhausii (Characiformes: Characidae): one fish species, three hydrographic basins - a natural or anthropogenic phenomenon?

Souza¹,

Oliveira²,

Pereira³

2015

DNA Barcodes

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We used the DNA barcoding technique (COI and CytB markers) combined with GMYC analysis to characterize the genetics of the widely distributed Neotropical fish species Knodus moenkhausii from three different isolated hydrographic basins. Despite the fact that most of the Neotropical hydrographic basins have been isolated for millions of years, species could be shared between basins due to natural events (stream capture) or anthropogenic activities. Recent surveys, however, have shown that many widely distributed species are actually species complexes divided into previously unrecognized cryptic species. In this study, we tested the hypothesis that K. moenkhausii from three hydrographic basins represent a single panmictic species and discuss the most likely explanation of its present geographical distribution. The GMYC analysis revealed that all specimens of K. moenkhausii represent a single species: the intra- and intergroup minimum K2P genetic distances for both genes were zero and haplotypes were shared among the three hydrographic basins. This suggests there has been recent interchange of K. moenkhausii throughout the three hydrographic basins. It is likely that this is due to recent human activities, either the transposition of natural barriers or intentional introduction or accidental escape due to the ornamental fish trade.

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Invasion, dispersion and hybridization of fish associated to river transposition: karyotypic evidence in Astyanax “bimaculatus group” (Characiformes: Characidae)

Cited by 22 publications

References 19 publications

Highlighting Astyanax Species Diversity through DNA Barcoding

Highlighting Astyanax Species Diversity through DNA Barcoding

Evolução Da Rede De Drenagem E Evidências De Antigas Conexões Entre as Bacias Dos Rios Grande E São Francisco No Sudeste Brasileiro

Knodus moenkhausii (Characiformes: Characidae): one fish species, three hydrographic basins - a natural or anthropogenic phenomenon?

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