Results 11 to 20 of about 160 (91)

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

On traits matching and the modular organization of food web and occurrence networks. [PDF]

J Anim Ecol
What mechanisms shape ecological networks? In Paraná River piscivores, species traits and abundance scaling promote modular structures. Our findings reveal how communities self‐organize and highlight the conditions needed to sustain them. Abstract Modularity and nestedness have been observed recurrently across different ecological networks, including ...
Borzone Mas D, Scarabotti PA, Vaschetto PA, Alvarenga P, Vazquez M, Arim M.   +5 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

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

DNA barcoding uncovers two putative new species in Trachelyopterus (Siluriformes: Auchenipteridae)

Journal of Fish Biology, EarlyView.
Abstract Trachelyopterus is a cryptic genus within the Neotropical catfish family Auchenipteridae with a complex history of taxonomic revisions. Despite the notable morphological and genetic similarities among its species, some studies suggest that the genus harbours greater diversity than is currently recognized, including additional species yet to be
Fiorindo José Cerqueira, Maelin da Silva, Chrystian Aparecido Grillo Haerter, Sandra Mariotto, Liano Centofante, Eliana Feldberg, Orlando Moreira Filho, Vladimir Pavan Margarido, Daniel Rodrigues Blanco, Roberto Laridondo Lui   +9 more
wiley   +1 more source

A new sexually dimorphic species of the armoured catfish genus Neoplecostomus (Siluriformes: Loricariidae) from Neotropical Atlantic coastal drainages

Journal of Fish Biology, EarlyView.
Abstract A new species of the small‐sized armoured catfish genus Neoplecostomus is described from Neotropical Atlantic coastal drainages, in southeast Brazil. The new species can be readily diagnosed from all congeners by having the first plates of the ventral series reduced in size, rounded and ventrally displaced, resulting in a naked band between ...
Pedro L. C. Uzeda, Tiago C. Pessali, Axel M. Katz, Felipe P. Ottoni, Francisco Langeani, Priscilla C. Silva   +5 more
wiley   +1 more source

Cryptic diversity and recent diversification in the Pyrrhulina australis species complex (Characiformes, Lebiasinidae) revealed by mitochondrial DNA

Journal of Fish Biology, EarlyView.
Abstract Pyrrhulina australis Eigenmann & Kennedy, 1903, is widely distributed across the main hydrographic basins of South America. The taxonomic integrity of this species is nevertheless challenged by the lack of clear diagnostic characters, its marked geographic variation and the morphological overlap with its congeners. In this context, the present
Taina Barbosa De Souza, Daniela Cristina Ferreira, Hugmar Pains Da Silva, Carolina B. Machado, Claudio Oliveira, André L. Netto‐Ferreira, Paulo C. Venere   +6 more
wiley   +1 more source

Description of the Early Development of Hoplias intermedius (Günther, 1864) (Characiformes: Erythrinidae)

Journal of Morphology, Volume 287, Issue 7, July 2026.
This study provides the first description of the early development of Hoplias intermedius (Characiformes: Erythrinidae), from the embryonic to the juvenile stage. The morphological, meristic, and morphometric characterization contributes to understanding the ontogeny and developmental transitions of Neotropical fishes, supporting taxonomy, conservation,
Mateus Babichi Veiga de Souza, Renan Souza Volpato, Andréa Bialetzki   +2 more
wiley   +1 more source

Consensus on future research directions in the phylum Rotifera

Limnology and Oceanography, Volume 71, Issue 7, July 2026.
Abstract Rotifers play key roles in aquatic ecosystems, yet significant uncertainty remains about their diversity and evolution, and further evidence is needed to determine how reliably their responses to global change and human impacts can inform conservation.
Rafael L. Macêdo, Carlota Solano‐Udina, Melanie D. Borup, Marco Antonio Jiménez‐Santos, Cristina Arenas‐Sánchez, Christina W. C. Branco, Karen Costa, Betina Kozlowsky‐Suzuki, Cláudia C. Bonecker, Elizabeth J. Walsh, André R. S. Garraffoni, S. S. S. Sarma, Agnieszka Ochocka, S. Nandini, Robert Wallace, Diego Fontaneto, Jonathan M. Jeschke, Gissell Lacerot   +17 more
wiley   +1 more source