Caio Crelier,Adriana Zumba,Daniel Peifer et al. Caio Crelier et al.

Renan B Dos Reis,Matheus Zirondi Roloff,Thiago Henrique Pedroso et al. Renan B Dos Reis et al.

This study presents the first record of the non-native species Bryconops aff. melanurus (Bloch 1794) within the upper Paraná River floodplain in Brazil. Two specimens were collected in December 2023 as part of a long-term ecological resear...

Manolo Penitente,Caio Augusto Gomes Goes,Rodrigo Zeni Dos Santos et al. Manolo Penitente et al.

The fish species Prochiloduslineatus has an interesting B chromosome system, with three morphological types as acrocentric, metacentric, and submetacentric. However, most cytogenetic studies on this species are restricted to the natural pop...

Caio Crelier,Adriana Zumba,Daniel Peifer et al. Caio Crelier et al.

The South American Transcontinental Drainage Divide (TDD) is roughly oriented NE-SW from its Atlantic termination in SE Brazil to its NW termination in the limits between the southwestern edges of the Amazon Craton and the Andean Foreland. ...

Isabelle Pereira Mari-Ribeiro,Bárbara Scorsim,Leandro Ranucci et al. Isabelle Pereira Mari-Ribeiro et al.

Astyanax is one of the most specious fish groups in the Neotropical region, with many cryptic species, which represents a challenge for correct identification through traditional taxonomic methods. Psalidodon is a recently resurrected genus...

Aymar Orlandi Neto,Lidiane Franceschini,João Henrique Pinheiro Dias et al. Aymar Orlandi Neto et al.

In freshwater ecosystems, parasite infection patterns are influenced by factors including spatial-temporal variations, host diet, and habitat. Fish often change diets, affecting their parasite communities. This study focused on non-native h...

João Paulo Morais-Silva,Bárbara Scorsim,Geovana Gonçalves et al. João Paulo Morais-Silva et al.

Cnesterodon comprises 10 valid species occurring in the major river basins of South America. Recent ichthyofaunistic studies in the Ivaí River basin, upper Paraná River system, suggested the existence of a possible new species, which was ...

Julieta Peluso,Cristina S Pérez Coll,Dante E Rojas et al. Julieta Peluso et al.

Sediments of aquatic ecosystems constitute the fate of most atmospheric and terrestrial pollutants. Since aquatic organisms, such as amphibians, interact with sediments, the presence of pollutants may affect their survival, growth and repro...

Sameh A Abou Rafee,Cintia B Uvo,Jorge A Martins et al. Sameh A Abou Rafee et al.

Assessing the relative contribution of Land Use and Cover Changes (LUCC) and climate changes on runoff still represents a great challenge for water resources management. This issue is particularly critical for the Upper Paraná River Basin ...

Eric Venturini Ywamoto,Dalton Tavares Bressane Nielsen,Claudio Oliveira Eric Venturini Ywamoto

A new species of the genus Melanorivulus belonging to the Melanorivulus pictus species group is herein described, from a tributary of the Rio Grande, Rio Paraná basin, São Paulo State, Brazil. The new species can be distinguished from all...