Results 51 to 60 of about 1,864 (206)

Variación morfológica de las especies de Astyanax, subgénero Zygogaster (Teleostei, Characidae) [PDF]

Animal Biodiversity and Conservation, 2011
Morphological variation of Astyanax species, subgenus Zygogaster (Teleostei, Characidae) The diverse Neotropical fish genus Astyanax inhabits a variety of aquatic environments. As with other species in this genus, the taxonomic status and phylogenetic
Ruiz-C., R. I., Román–Valencia, C., Herrera–M., B. E., Peláez, O. E., Ermakova–A., A.   +4 more
doaj  

Presence of Cheirodon Interruptus in Valcheta stream, Río Negro province, Argentina [PDF]

, 2015
El arroyo Valcheta es una cuenca endorreica localizada en la provincia de Río Negro, Argentina. En este arroyo se conocen dos especies de vertebrados endémicas: la mojarra desnuda ( Gymnocharacinus bergii ) y la rana de Valcheta ( Pleurodema ...
Gosztonyi, Atila Esteban, Kacoliris, Federico Pablo, López, Hugo Luis, Perez, Cristian Hernan Fulvio, Petracci, Pablo Fabricio, Povedano, Emilio   +5 more
core  

Une nouvelle espèce de Bryconexodon (Pisces, Characidae) décrite du bassin du Trombetas (Para, Brésil) [PDF]

, 1991
Une nouvelle espèce du genre #Bryconexodon$ Géry (#Pisces$, #Characidae$) est décrite du cours supérieur du Rio Trombetas (Para, Brésil). #Bryconexodon$ n. sp. est très voisine de #B.
Dos Santos, G.M., Ferreira, E., Jégu, Michel   +2 more
core   +1 more source

Interspecific Associations of the Rare and Endangered Stingray (Styracura schmardae) in Caribbean Sandy‐Bottom Habitats

Ecology and Evolution, Volume 15, Issue 11, November 2025.
We document novel interspecific associations of the endangered Atlantic chupare stingray (Styracura schmardae) in Caribbean sandy‐bottom habitats. Observations include nuclear–follower interactions with needlefish (Strongylura marina) and hitchhiking by sharksuckers (Echeneis naucrates), revealed through direct in situ records and citizen science data ...
Gustavo F. de Carvalho‐Souza, Erica Sparaventi, Silvia Echeverría‐Sáenz   +2 more
wiley   +1 more source

Local Environmental Variables Predict Fish Species Richness and Composition in Sand Beaches of a Neotropical River

River Research and Applications, Volume 41, Issue 9, Page 1949-1958, November 2025.
ABSTRACT Local and regional species diversity is influenced by historical factors, resource availability, biotic interactions, the presence of resources, and adequate environmental conditions. We evaluated the effects of local environmental variables and spatial structure on fish species richness and composition along sandy beaches of a Neotropical ...
Ronaldo Souza da Silva, Jean Carlo Gonçalves Ortega, Lucas Pires de Oliveira, Vinicius Guerra, Werther Pereira Ramalho, Fabiano Corrêa, Mariana Costa Fratari, Lisandro Juno Soares Vieira, Luciano Fogaça Assis de Montag   +8 more
wiley   +1 more source

Comparative local analysis of metabolites, lipids and proteins in intact fish tissues by LAESI mass spectrometry [PDF]

, 2013
Direct mass spectrometric analysis of animal tissues is an emerging field enabled by recent developments in ambient ion sources. Label-free in situ analysis of metabolites, lipids, and peptides/proteins from intact tissues in whole fish specimens of ...
Burns, R., Javonillo, R., Pirger, Zsolt, Shrestha, B., Vertes, A.   +4 more
core   +1 more source

Comparative morphology of gill glands in externally fertilizing and inseminating species of cheirodontine fishes, with implications on the phylogeny of the family Characidae (Actinopterygii: Characiformes)

Neotropical Ichthyology, 2012
The structure and form of gill gland among inseminating and externally fertilizing species of the Cheirodontinae are described under light microscopy, scanning electron microscopy, and transmission electron microscopy, and compared to other members of ...
Cristina L. C. de Oliveira, Luiz R. Malabarba, John R. Burns   +2 more
doaj  

Astyanax totae, a new characid species (Teleostei: Characidae) from the upper rio Iguaçu basin, southeastern Brazil

Neotropical Ichthyology
A new species of characid fish, Astyanax totae, is described from a small tributary in the upper drainage of the rio Iguaçu, Paraná basin, Brazil.
Carolina Ferreira Haluch, Vinícius Abilhoa   +1 more
doaj   +1 more source

Semblanzas Ictiológicas Iberoamericanas: Fernando Rogério de Carvalho. [PDF]

, 2014
Através desta nova série, tentamos conhecer os diferentes aspectos pessoais dos integrantes da comunidade ictiológica ibero-americana. Esta iniciativa compartilha o espírito e o objetivo das biografias de pesquisadores brasileiros, procurando ...
López, Hugo Luis, Ponte Gómez, Justina
core  

Seasonal Forest Resources Support Fish Biomass in Floodplain Lakes of an Amazonian Tributary

Freshwater Biology, Volume 70, Issue 11, November 2025.
ABSTRACT The Flood Pulse Concept is a foundational ecological theory that emphasizes the critical role of lateral connectivity between a river channel and its floodplain. Many tropical rivers inundate the surrounding floodplain in the flood stage, thereby receiving large amounts of terrestrial organic matter that can be decomposed by microbes and ...
Timothy D. Jardine, Francisco Villamarín, Joseph E. Hawes, Joao Campos‐Silva, Cristina M. Jacobi, Stephen Srayko, Alexander Pelletier, William E. Magnusson   +7 more
wiley   +1 more source