Results 81 to 90 of about 12,679 (227)

Helminth parasites of alien freshwater fishes in Patagonia (Argentina) [PDF]

, 2018
A survey of the helminth parasites of alien freshwater fishes from Argentinean Patagonia is presented, based on samples taken from 2010 to 2017 and including previous published records.
Flores, Verónica Roxana, Rauque Perez, Carlos Alejandro, Salgado Maldonado, Guillermo, Vega, Rocío Marisol, Viozzi, Gustavo Pedro, Waicheim, María Agustina   +5 more
core   +1 more source

Phylogenetic relationships of the enigmatic Carlastyanax aurocaudatus (Eigenmann) with remarks on the phylogeny of the Stevardiinae (Teleostei: Characidae)

Neotropical Ichthyology
The monotypic genus Carlastyanax Géry was defined to include Astyanax aurocaudatus, a morphologically odd species having, among other features, four teeth in the posterior premaxillary row and eight branched dorsal-fin rays. Later on, the characters used
Juan Marcos Mirande, Fernando Camargo Jerep, James Anyelo Vanegas-Ríos   +2 more
doaj   +1 more source

Two new species of Astyanax (Ostariophysi: Characiformes: Characidae) from eastern Brazil, with a synopsis of the Astyanax scabripinnis species complex

Neotropical Ichthyology
Two new species of Astyanax are described from eastern Brazil: A . microschemos from the córrego Palmital, rio Itapemirim drainage, Espírito Santo, and A . pelecus from the rio Pardo drainage, Bahia.
Vinicius A. Bertaco, Carlos A. S. de Lucena   +1 more
doaj   +1 more source

Physical mapping of the 18S and 5S ribosomal genes in nine Characidae species (Teleostei, Characiformes)

Genetics and Molecular Biology, 2008
Characidae is one of the largest fish families of the Neotropical region, and presenting a pronounced morphological variability, certainly does not constitute a monophyletic group.
Wellington Adriano Moreira Peres, Luiz Antonio Carlos Bertollo, Orlando Moreira Filho   +2 more
doaj   +1 more source

Bibliografía de los peces de agua dulce de Argentina y Uruguay : Suplemento 1982 [PDF]

, 1982
Fil: López, Hugo Luis. División Zoología Vertebrados, Museo de La Plata, UNLPFil: Menni, Roberto Carlos. División Zoología Vertebrados, Museo de La Plata, UNLPFil: Ringuelet, Raúl Adolfo. Instituto de Limnología Dr. Raúl A. Ringuelet (ILPLA); Facultad de
López, Hugo Luis, Menni, Roberto Carlos, Ringuelet, Raúl Adolfo   +2 more
core  

Ecomorphology of Astyanax species in streams with different substrates

Zoologia (Curitiba), 2014
In the present study, we assessed the ecomorphology of two species of Astyanax in streams with different substrates found in the Rio São Francisco Basin.
Marcela A. Souza, Daniela C. Fagundes, Cecília G. Leal, Paulo S. Pompeu   +3 more
doaj   +1 more source

A new species of Astyanax (Characiformes: Characidae) from the rapids of the lower rio Xingu, Brazil

Neotropical Ichthyology
Astyanax dnophos, new species, is described from the lower rio Xingu, Pará, Brazil. The new species is distinguished from its purported congeners by the presence of a broad longitudinal, midlateral dark stripe that extends from the snout to the caudal ...
Flávio C.T. Lima, Jansen Zuanon
doaj   +1 more source

Optimal sensing for fish school identification

, 2019
Fish schooling implies an awareness of the swimmers for their companions. In flow mediated environments, in addition to visual cues, pressure and shear sensors on the fish body are critical for providing quantitative information that assists the ...
Arampatzis, Georgios, Koumoutsakos, Petros, Novati, Guido, Papadimitriou, Costas, Verma, Siddhartha, Weber, Pascal   +5 more
core   +1 more source

Hypocretin underlies the evolution of sleep loss in the Mexican cavefish [PDF]

, 2018
The duration of sleep varies dramatically between species, yet little is known about the genetic basis or evolutionary factors driving this variation in behavior. The Mexican cavefish, Astyanax mexicanus, exists as surface populations that inhabit rivers,
Duboue, Erik R., Jaggard, James B., Keene, Alex C., Lloyd, Evan, Prober, David A., Stahl, Bethany A.   +5 more
core   +1 more source

Astyanax guaricana (Ostariophysi: Characidae), a new species from the rio Cubatão drainage, Paraná State, Southern Brazil

Neotropical Ichthyology
In this paper we describe a new species of Astyanax collected in the Atlantic Rainforest, in tributaries to the rio Cubatão, coastal basin of the Paraná State, Brazil. The new species presents a combination of characters that allows its allocation in the
Carlos A. M. Oliveira, Vinicius Abilhoa, Carla S. Pavanelli   +2 more
doaj   +1 more source