Results 1 to 10 of about 160 (89)

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil. [PDF]

J Fish Biol
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Kampfert LEP, Maicrovicz JC, Blanco DR, Lange D, Pavanelli CS, Brandão H.   +5 more
europepmc   +2 more sources

Hybridization, Maternal Inheritance, and Evolutionary Time of Divergence of Endangered Species of <i>Hypancistrus</i> (Siluriformes: Loricariidae) in the Xingu River. [PDF]

Ecol Evol
We uncover recent hybridization dynamics among three endemic Hypancistrus species from the Xingu River, including the critically endangered H. zebra. Mitogenomic analyses reveal unidirectional maternal inheritance and recent evolutionary radiation (< 0.5 Ma), explaining their retained reproductive compatibility.
Kerniske FF, Melo BF, Sousa LM, Degrandi TM, Artoni RF.   +4 more
europepmc   +2 more sources

Molecular characterization of Serrasalmidae hybrid in the upper Paraná River floodplain using molecular markers. [PDF]

J Fish Biol
Abstract This study reports the molecular identification of a tambacu—a hybrid of Colossoma macropomum and Piaractus mesopotamicus—in the floodplain of the upper Paraná River using molecular markers. The PCR‐GEL method, based on the analysis of COI and TROP fragments, successfully characterized the hybrid, while PCR‐SEQ, employing RAG2 and TROP markers,
Ramos LI, de Páris Paz E, Cavalcanti LD, Takemoto RM, de Oliveira AV.   +4 more
europepmc   +2 more sources

External Morphology of Leporinus oliveirai (Characiformes: Anostomidae) During Early Life Stages. [PDF]

J Morphol
Herein, we describe the early development of Leporinus oliveirai, a recently described species, documenting its external morphology with photographs and illustrations. The ontogeny of L. oliveirai is compared with other anostomids and developmental patterns are described for the family.
Ito ISB, Boaretto MP, Venturieri M, Bialetzki A, Birindelli JLO.   +4 more
europepmc   +2 more sources

Mammal defaunation leads to biotic homogenization of plant communities in tropical rainforests. [PDF]

Ecology
Abstract Biotic homogenization is the process in which species communities become increasingly similar across different regions over time. This phenomenon has substantial ecological, evolutionary, and economic implications, primarily driven by human activities such as habitat destruction, invasive species introduction, and climate change.
Ribas LGDS, Villar N, Zipparro V, Nazareth S, Souza Y, Brocardo CR, Schmaedecke G, Hortenci L, Alves RSC, Galetti M.   +9 more
europepmc   +2 more sources

A new species of Characidium (Characiformes: Crenuchidae) from the Iguaçu National Park, Rio Iguaçu basin, Paraná, Brazil. [PDF]

J Fish Biol
Abstract A new species of Characidium is described from the Iguaçu National Park, Brazil. The new species can be diagnosed from the congeners by the absence of conspicuous vertical bars, blotches and spots along the sides of the body, the presence of a scaled isthmus and adipose fin, a series of scales below lateral line and the presence of a thin dark
Stabile BHM, Dos Reis RB, de Oliveira AV, da Graça WJ.   +3 more
europepmc   +2 more sources

Ictiofauna de la subcuenca urbana del río Ocoa, drenaje superior del río Meta, cuenca del Orinoco, Colombia

Graellsia, 2023
El conocimiento acerca de la ictiofauna de los tramos altos del río Meta, uno de los principales afluentes del Orinoco, es aún poco conocida. En este trabajo se presenta el primer listado de peces registrados para el río Ocoa, a partir de 51 901 ...
Hernando Ramírez-Gil‍, Miguel Ángel Cortés-Hernández, Rosa Elena Ajiaco-Martínez   +2 more
doaj   +1 more source

Ictiofauna de los ambientes de piedemonte y sabana en el drenaje del río Casanare, cuenca del Orinoco, Colombia

Biota Colombiana, 2018
Actualmente, sólo se han registrado 20 especies de peces para el río Casanare, uno de los principales afluentes de la cuenca del río Meta. Con el fin de caracterizar los ensamblajes de peces de este río, se realizaron muestreos en 35 estaciones de ...
Jhon Zamudio, Alexander Urbano-Bonilla, Vicente Preciado-Silva, Daniel Rodríguez-Cubillos, Edgar Esteban Herrera-Collazos   +4 more
doaj   +3 more sources

El paraquat afecta la actividad de la ATPasa mitocondrial, las concentraciones de glutatión y la expresión de la gp-glicoproteína en el hígado del pez Colossoma macropomum

Revista de Biologia Neotropical, 2013
Avaliou-se o efeito de uma concentração subletal de 10 mg / L de o herbicida paraquat sobre a actividade ATPase mitocondrial (ATPasamit), a concentração de glutationa (GSH) e a expressão de P-glicoproteina (P-gp) de fígado de peixe Cachama, Colossoma ...
Aridays Oliveros, Evelin Rojas-Villarroel, Raquel Salazar-Lugo   +2 more
doaj   +1 more source

MicroCT reinvestigation of the only articulated fossil anostomid fish reveals synonymy of Arhinolemur Ameghino, 1898 and Megaleporinus Ramirez et al., 2017

The Anatomical Record, EarlyView.
Abstract Arhinolemur scalabrinii† Ameghino, 1898 was originally described as a strepsirrhine primate (Mammalia) but has been recognized as an anostomid fish since 2012. It remains the only extinct anostomid species known from complete cranial material.
Karen M. Panzeri, Humberto L. Andrelino, Sergio Bogan, José P. O'Gorman, Federico Agnolín, Brian L. Sidlauskas, Nahuel Vega, Agustín G. Martinelli, José L. Birindelli   +8 more
wiley   +1 more source