Results 11 to 20 of about 3,034 (104)

Redescription of Astyanax brevoortii (Gill, 1858) (Characiformes, Characidae) and description of three new species of Astyanax subgenus Poecilurichthys, from Caribbean Sea basins, Venezuela

open access: yesJournal of Aquaculture & Marine Biology, 2023
In Astyanax (Poecilurichthys), we recognize six species-groups defined by the distribution of melanophores on the body: 1. bimaculatus; 2. rupununi; 3. abramis: 4. orthodus; 5. asuncionensis; and 6. anterior, which are named for a representative species.
C. Valencia, R. Ruiz-C., D. Taphorn
semanticscholar   +1 more source

First record of Astyanax puka Mirande, Aguilera & Azpelicueta, 2007 (Teleostei: Characidae) in Juramento River basin, Salta, Argentina [PDF]

open access: yes, 2014
Astyanax puka was described from the endorheic Río Salí basin, Argentina, and it was not previously recorded elsewhere, being considered until now as endemic from that basin.
Aguilera, Gaston   +2 more
core   +1 more source

A new cave population of Astyanax mexicanus from Northern Sierra de El Abra, Tamaulipas, Mexico

open access: yesSubterranean Biology, 2023
The Astyanax genus represents an extraordinary example of phenotypic evolution, being their most extreme examples the blind and depigmented morphs, which have evolved from independent surface-dwelling lineages.
R. Miranda-Gamboa   +6 more
semanticscholar   +1 more source

Phylogeographic relationships and morphological evolution between cave and surface Astyanax mexicanus populations (De Filippi 1853) (Actinopterygii, Characidae)

open access: yesMolecular Ecology, 2023
The Astyanax mexicanus complex includes two different morphs, a surface‐ and a cave‐adapted ecotype, found at three mountain ranges in Northeastern Mexico: Sierra de El Abra, Sierra de Guatemala and Sierra de la Colmena (Micos).
M. Garduño‐Sánchez   +10 more
semanticscholar   +1 more source

Fish fauna from Río Pilcomayo National Park and Ramsar Site and its surroundings, Formosa, Argentina [PDF]

open access: yes, 2014
The first list of fish species from the Río Pilcomayo National Park and Ramsar Site (RPNP), located in the WetChaco plains of Northern Argentina is presented here.
Baigún, Claudio Rafael M.   +5 more
core   +4 more sources

The Mexican Tetra, Astyanax mexicanus, as a Model System in Cell and Developmental Biology.

open access: yesAnnual Review of Cell and Developmental Biology, 2023
Our understanding of cell and developmental biology has been greatly aided by a focus on a small number of model organisms. However, we are now in an era where techniques to investigate gene function can be applied across phyla, allowing scientists to ...
P. Perera   +2 more
semanticscholar   +1 more source

Evolutionary modifications of Astyanax larval prey capture (LPC) in a dark environment

open access: yesZoological Research, 2023
Feeding strategies of an organism depend on the multimodal sensory processing that most efficiently integrates available visual, chemosensory, and/or mechanoreceptive cues as part of their environmental adaptation.
L. Espinasa   +3 more
semanticscholar   +1 more source

Effect of dosage of orally administered 17α-methyltestosterone on sex reversion of the yellowtail tetra Astyanax lacustris (Lütken, 1875)

open access: yesAnimal Reproduction, 2023
The females of yellowtail tetra (Astyanax lacustris), known as the freshwater sardine, are approximately 1.33 times larger than males, and thus, all-female monosex culture would increase production and reduce size variability.
R. Farias   +7 more
semanticscholar   +1 more source

3D spheroid culturing of Astyanax mexicanus liver-derived cell lines recapitulates distinct transcriptomic and metabolic states of in vivo tissue environment

open access: yesbioRxiv, 2023
In vitro assays are crucial tools for gaining detailed insights into various biological processes, including metabolism. Cave morphs of the river-dwelling fish species, Astyanax mexicanus, have adapted their metabolism allowing them to thrive in the ...
T. Biswas   +4 more
semanticscholar   +1 more source

Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil. [PDF]

open access: yes, 2015
A análise da dieta de Astyanax paranae Eigenmann, 1914 em nove riachos localizados na bacia do rio Passa-Cinco, sistema do alto rio Paraná, foi realizada com o objetivo de investigar os hábitos alimentares desta espécie, verificar possíveis variações ...
CYRINO, J. E. P.   +2 more
core   +1 more source

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