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Ichthyofauna from tributaries of Urubu and Amazonas rivers, Amazonas State, Brazil

Made available in DSpace on 2020-12-10T17:27:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01. Added 1 bitstream(s) on 2021-07-15T15:24:46Z : No. of bitstreams: 1 S1676-06032020000200301.pdf: 11738870 bytes, checksum: efb43ac74fa49c54c2cedc6d66cacaa2 (MD5); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); The Amazonas River basin comprises the world's highest fish species dive...

One thousand DNA barcodes of piranhas and pacus reveal geographic structure and...

Piranhas and pacus (Characiformes: Serrasalmidae) are a charismatic but understudied family of Neotropical fishes. Here, we analyse a DNA barcode dataset comprising 1,122 specimens, 69 species, 16 genera, 208 localities, and 34 major river drainages in order to make an inventory of diversity and to highlight taxa and biogeographic areas worthy of further sampling effort and conservation protection. Using four m...

Ichthyofauna from floodplain lakes of Reserva de Desenvolvimento Sustentável Pi...

The ichthyofauna of the rio Purus has been little investigated, especially in its lower portion, characterized by diverse aquatic environments, especially in flooded areas. We inventoried the ichthyofauna of floodplain lakes with different management efforts in Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP), which represent important resource for commercial fishing in North region, in the first i...

Fishes from first order streams of lower Paranapanema and Ivaí rivers, upper Pa...

This study was developed as a research of first order streams fish assemblages located in two Conservation Units in Northwestern Paraná, Brazil, with the purpose of providing information about ichthyofauna composition of these water bodies while they are still under protection. There were captured 2,557 individuals belonging to six orders, nine families and 10 species in three streams. The most abundant species...

A new silver dollar species of Metynnis cope, 1878 (Characiformes: Serrasalmida...

A new Metynnis is described from the rio Negro in Brazil and Venezuela, and from black- or clearwater tributaries in Brazil including the rios Parauari, Uatumã, Trombetas, and Sucunduri (the latter belonging to the rio Madeira basin). The new species can be distinguished readily from all congeners by having a high concentration of dark chromatophores on the lateral line scales. It can be further distinguished b...

A new species of Hemigrammus gill, 1858 (Characiformes: Characidae) from the Ri...

A new Hemigrammus is described from the rio Paraguai and rio Madeira basins, Mato Grosso and Rondônia States, Brazil. The new species is characterized by possessing a wide dark horizontal stripe across the eye, a vertically elongated humeral blotch, and 4-5 gill-rakers on upper branch and 9-10 on lower. The new species can be easily diagnosed from H. lunatus, the sympatric and morphologically most similar conge...

Integrative taxonomy reveals a new species of Pacu (Characiformes: Serrasalmida...

Pacus of the genus Myloplus represent a formidable taxonomic challenge, and particularly so for the case of M. asterias and M. rubripinnis, two widespread and common species that harbor considerable morphological diversity. Here we apply DNA barcoding and multiple species discovery methods to find candidate species in this complex group. We report on one well-supported lineage that is also morphologically and e...

Redescription and geographical distribution of the endangered fish ossubtus xin...

The monotypic species Ossubtus xinguense was originally described based on scarce material putatively divided into juveniles and adults. Ossubtus xinguense has a restricted distribution and was previously known only from a few rapids downstream of the city of Altamira, in the Volta Grande stretch of the Middle Xingu River. Until recently, the species was rare in museums because its habitat (large rapids) is dif...

Bryconops rheorubrum (Characiformes: Iguanodectidae), new species from the Rio ...

Revisão taxonômica das espécies de Hemigrammus Gill, 1858 (Characiformes: Chara...

A revision of the species within Hemigrammus from rio Paraguai basin was conducted, involving the analysis of about 1330 specimens of Hemigrammus. Five species were redescribed: H. lunatus, H. mahnerti, H. neptunus, H. tridens and H. ulreyi, and three undescribed species were identified (Hemigrammus sp. 1, Hemigrammus sp. 2, and Hemigrammus sp. 3). Hyphessobrycon maxillaris was considered a junior synonym of He...