A new genus and species of characid fish from the Amazon basin: the recognition of a relictual lineage of characid fishes (Ostariophysi: Cheirodontinae: Cheirodontini) [PDF]
Neotropical Ichthyology, 2008 Amazonspinther dalmata, a new miniature characid from the streams of rio Purus and rio Madeira, right bank tributaries of the rio Amazonas, is described as a new genus and species of the subfamily Cheirodontinae.
Cristina M. Bührnheim +3 more
doaj +4 more sources
On Dactylogyridae (Monogenea) of four species of characid fishes from Brazil [PDF]
Check List, 2009 Material collected from the fishes from the dams and fish farms of the Departamento Nacional de Obras contra as Secas (DNOCS) and from the tanks of the Itaipu Hydroelectric Station was examined in order to analyze the index and the infestation of ...
Simone Cohen, Anna Kohn
doaj +7 more sources
Astyanaxelachylepis, a new characid fish from the rio Tocantins drainage, Brazil (Teleostei: Characidae) [PDF]
Neotropical Ichthyology, 2005 A new characid species, Astyanax elachylepis, is described from the rio Tocantins drainage. The new species is distinguished from its congeners by possessing 48-53 perforated scales along the lateral line, a large caudal-peduncle spot, the presence of ...
Vinicius A. Bertaco, Paulo H. F. Lucinda
doaj +3 more sources
Caldasia, 2014 Hemibrycon brevispini is a Neotropical characid fish endemic in La Venada Creek, a headwater tributary of the Quindío River of Colombia ( Cauca River drainage).
CRISTIAN ROMÁN-P. +2 more
doaj +3 more sources
A new characid fish, Hyphessobryconhexastichos (Characiformes: Characidae) from Chapada dos Parecis, Mato Grosso, Brazil [PDF]
Neotropical Ichthyology, 2005 A new characid species, Hyphessobrycon hexastichos, is described from the upper rio Tapajós, Mato Grosso, Brazil. The new species is distinguished from all other Hyphessobrycon species by the presence of black zigzag longitudinal lines between ...
Vinicius A. Bertaco, Tiago P. Carvalho
doaj +3 more sources
Keystone Predation: What Is It, and Is It Supported by Empirical Evidence? [PDF]
Ecol EvolKeystone predation has been widely cited as a key ecological mechanism controlling community structures, but is supported by limited theoretical and experimental studies. Reviewing these studies showed keystone predation has been documented across realms, appears to be most prevalent in sessile and dispersal‐limited communities and can be modified by ...
Gillis AJ, Thomsen MS, Tonkin JD.
europepmc +2 more sources
Threshold responses of floating meadow fish communities to floodplain forest cover in the lower Amazon River. [PDF]
Conserv BiolAbstract Forest cover is positively associated with fish biomass and fisheries yield in the Amazon River floodplain, and many species enter flooded forests to feed, spawn, or seek refuge from predation. Floating macrophyte beds, known as floating meadows, in Amazon floodplains support high fish diversity and serve as nursery habitat for many fishes of ...
Grinstead S +6 more
europepmc +2 more sources
Revealing the Satellite DNA History in Psalidodon and Astyanax Characid Fish by Comparative Satellitomics. [PDF]
Front Genet, 2022 Eukaryotic genomes are usually enriched in repetitive DNA sequences, which can be classified as dispersed or tandemly repeated elements. Satellite DNAs are noncoding monomeric sequences organized in a head-to-tail fashion that are generally located on the subtelomeric and/or pericentromeric heterochromatin.
Goes CAG +8 more
europepmc +6 more sources
Altitudinal variation for B chromosome frequency in the characid fish Astyanax scabripinnis [PDF]
Heredity, 2000 The analysis of three populations of the characid fish Astyanax scabripinnis located at different altitudes along the same stream has revealed the presence of a macro B chromosome in two high-altitude populations (1800 m and 1920 m) but its absence from a low-altitude population (700 m).
D M, Néo, O M, Filho, J P, Camacho
openaire +2 more sources
A phylogenetic analysis of Brycon and Henochilus (Characiformes, Characidae, Bryconinae) based on the mitochondrial gene 16S rRNA [PDF]
, 2008 The genus Brycon, the largest subunit of the Bryconinae, has 42 valid species distributed from southern Mexico to the La Plata River in Argentina. Henochilus is a monotypic genus, comprising a single species (H.
HILSDORF, Silva +3 more
core +2 more sources