Results 61 to 70 of about 1,505 (203)

Ecological Factors and Diversification among Neotropical Characiforms [PDF]

open access: yes, 2012
Morphological and DNA sequence data has been used to propose hypotheses of relationships within the Characiformes with minimal comparative discussion of causes underpinning the major intraordinal diversification patterns.
Duque Escobar, Santiago Roberto   +5 more
core   +1 more source

Osteología y lepidología de Gymnocharacinus Bergi [Pisces Characidae] [PDF]

open access: yes, 1983
Fil: Miquelarena, Amalia María. CONICETFil: Aramburu, Raúl Horacio.
Aramburu, Raúl Horacio   +1 more
core  

Two new Bryconamericus: B. cinarucoense n. sp. and B. singularis n. sp. (Characiformes, Characidae) from the Cinaruco River, Orinoco Basin, with keys to all Venezuelan species [PDF]

open access: yes, 2008
Here we describe for the first time Bryconamericus cinarucoense n. sp. and Bryconamericus singularis n. sp., two new species of Characiformesfrom the Cinaruco River, Orinoco Basin in Venezuela. B. cinarucoense n. sp.
Román-Valencia, C.   +2 more
core  

Megalocytivirus: A Review of Epidemiology, Pathogenicity, Immune Evasion, and Prevention Strategies

open access: yesReviews in Aquaculture, Volume 17, Issue 3, June 2025.
ABSTRACT Megalocytivirus, a large double‐stranded DNA virus belonging to the Iridoviridae family, has infected over 100 species of fish, leading to significant economic losses in the aquaculture, food, and ornamental fish industries. These viruses exhibit icosahedral symmetry and have diameters ranging from 120 to 200 nm.
Changjun Guo   +4 more
wiley   +1 more source

Diet and dietary overlap of three sympatric fish species in lakes of the upper Paraná River floodplain

open access: yesBrazilian Archives of Biology and Technology, 1999
For a dietary study, specimens of Astyanax bimaculatus, Astyanax schubarti, and Moenkhausia intermedia were caught monthly with seines-nets in six lakes (Pau Veio, Porto Rico, Três Amigos, Mutum, Pontal, and Canal do Meio), on the floodplain of the Upper
Karla Danielle Gaspar da Luz   +1 more
doaj   +1 more source

Peixes insetívoros e zooplanctófagos da planície inundável do Rio Miranda, Pantanal, Mato Grosso do Sul, Brasil. [PDF]

open access: yes, 2015
Estudou-se a alimentacao de peixes insetivoros e zooplanctofagos de quatro ambientes da planicie de inundacao do rio Miranda (dois bracos mortos, uma vazante e uma lagoa). Cinco especies sao insetivoras (T. stellatus, R. hahni, P. mucosa, P. striatulus e
ALMEIDA, V. L. L. de   +3 more
core   +1 more source

Tropical Rainfall and eDNA Washout Impact Estimations of Amazonian Biodiversity Patterns From Environmental Samples

open access: yesEnvironmental DNA, Volume 7, Issue 3, May–June 2025.
We used eDNA to assess seasonal biodiversity patterns in a tropical river in French Guiana. Our results show that rainfall increases the detection of terrestrial species through eDNA washout and leads to species homogenization via increased eDNA transport.
Céline Condachou   +5 more
wiley   +1 more source

Les stratégies de reproduction et les premiers stades de vie des poissons du fleuve Sinnamary (Guyane française) : une revue bibliographique [PDF]

open access: yes, 1994
Le barrage hydro-électrique de Petit-Saut, construit par Electricité de France sur le fleuve Sinnamary en Guyane française, a été fermé en janvier 1994. Cet ouvrage a profondément modifié un milieu dont les éléments avaient co-évolué depuis de nombreuses
Ponton, Dominique, Tito de Morais, Luis
core  

The impact of increasing turbidity on the predator–prey interactions of freshwater fishes

open access: yesFreshwater Biology, Volume 70, Issue 1, January 2025.
Abstract Human activities are exacerbating environmental change globally. Turbidity in freshwater systems is increasing due to extreme weather events and intensification of activities such as deforestation, urbanisation, agriculture and altering water flow with dams and other structures.
Costanza Zanghi, Christos C. Ioannou
wiley   +1 more source

Functional trophic composition of the ichthyofauna of forest streams in eastern Brazilian Amazon. [PDF]

open access: yes, 2015
Este estudo teve como objetivo descrever a organização funcional da fauna de peixes de riachos do nordeste do estado do Pará, Brasil, com base em observações comportamentais das táticas alimentares das espécies. Sete igarapés foram amostrados entre junho
BREJÃO, G. L., GERHARD, P., ZUANON, J.
core  

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