Results 21 to 30 of about 722 (134)

Astyanax chico

, 2006
Astyanax chico: CI-FML 3837, 13 ex., 52.5-80.4 mm, Argentina, Salta, Orán, La Bambú, Río Bermejo basin, Arroyo El Oculto.
J. M. Mirande, G. Aguilera, M. D. L. M. Azpelicueta   +2 more
openaire   +2 more sources

Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguaçu, Paraná, Brazil (Ostariophysi, Characiformes, Characidae)

Brazilian Journal of Biology
Five new species of the Neotropical characiform genus Astyanax Baird & Girard are described from Rio Iguaçu at the border of Paraná and Santa Catarina states, southeastern Brazil and Astyanax gymnogenis Eigenmann is redescribed.
JC. Garavello, FAA Sampaio
doaj   +1 more source

Comparative cytogenetics of Astyanax (Teleostei: Characidae) from the upper Paraguay basin

Neotropical Ichthyology, 2018
Astyanax is one of the most abundant and diverse taxa of fishes in the Neotropical region. In order to increase the amount of cytogenetic information for Astyanax as well as to exhibit data to subsidize future taxonomic studies, this work analyzed three ...
Thais K. S. S. Teixeira, Paulo C. Venere, Daniela C. Ferreira, Sandra Mariotto, Jonathan P. Castro, Roberto F. Artoni, Liano Centofante   +6 more
doaj   +1 more source

Complex Evolutionary and Genetic Patterns Characterize the Loss of Scleral Ossification in the Blind Cavefish Astyanax mexicanus. [PDF]

PLoS ONE, 2015
The sclera is the tough outer covering of the eye that provides structural support and helps maintain intraocular pressure. In some fishes, reptiles, and birds, the sclera is reinforced with an additional ring of hyaline cartilage or bone that forms from
Kelly E O'Quin, Pooja Doshi, Anastasia Lyon, Emma Hoenemeyer, Masato Yoshizawa, William R Jeffery   +5 more
doaj   +1 more source

Exposure–Recovery Approach for Hepatic Toxicity Analysis of Pyrethroid Lambda‐Cyhalothrin: Histopathological, Histochemical, and Biochemical Responses in Oreochromis niloticus

Journal of Applied Toxicology, EarlyView.
ABSTRACT Lambda‐cyhalothrin is a synthetic pyrethroid insecticide widely used in agriculture, but its potential to contaminate aquatic ecosystems and exert high toxicity on fish at low concentrations raises ecotoxicological concerns. While standard histopathological and biochemical assessments are common, the novel integration of pigment‐based ...
Carlos Eurico Fernandes, André Luiz do Nascimento Silva, Tiago Venancio da Silva, Karine Nathiele Nogueira Farias, Sabrina Fuzer Gonçalves, Brenda de Oliveira Martins, Maria Eduarda Corona Garcia, Lilian Franco‐Belussi   +7 more
wiley   +1 more source

Chromosomal analysis of Astyanax fasciatus (PISCES, CHARACIDAE) from the Araguari river, Uberlândia, MG, Brazil

Brazilian Journal of Biology
The genus Astyanax is one of the most numerous of the family Characidae, comprising a large number of similar-shaped species, but displaying innumerable karyotypic variations in its chromosome number and/or structure.
A. R. Torres-Mariano, S. Morelli
doaj   +1 more source

O lambari Astyanax altiparanae (Characidae) pode ser um dispersor de sementes? - DOI: 10.4025/actascibiolsci.v25i2.2045

Acta Scientiarum: Biological Sciences, 2008
Este trabalho caracterizou a alimentação natural de Astyanax altiparanae na sub-bacia do rio Corumbataí e bacia do rio Jacaré-pepira, com enfoque principal na ingestão de sementes de Croton urucurana.
Leandro Muller Gomiero, Francisco Manoel de Souza Braga   +1 more
doaj   +1 more source

Genome Expansion of ZPB1(a) and ZPC1(a) in Basal Species or Liver Expression of ZPB1a and ZPC1aa in Advanced Species, Two Different Strategies to Ensure Sufficient ZP Synthesis in Teleosts

Integrative Zoology, EarlyView.
We found that teleosts employed two different strategies to ensure sufficient ZP (zona pellucida) synthesis: expansion of ZPB1(a) and ZPC1(a) in basal species or liver expression of ZPB1a and ZPC1aa in advanced species. The N‐terminus of expanded ZPB1(a) or ZPC1(a) and liver‐expressed ZPB1a contains repeated units or low‐complexity regions to form ...
Tian Gao, Suying Ma, Shiyi Zhang, Fan Bai, Lingyao Gan, Wenjing Tao, Feilong Wang, Deshou Wang, Lina Sun   +8 more
wiley   +1 more source

Astyanax goyanensis (Miranda-Ribeiro, 1944), new combination and Astyanax courensis, new species (Ostariophysi: Characiformes): two Characidae from the upper rio Tocantins basin, Central Brazil

Neotropical Ichthyology
Astyanax goyanensis (Miranda-Ribeiro, 1944), new combination, is redescribed based on the type series and topotypes, and A. courensis, new species, is herein described.
Vinicius A Bertaco, Fernando R Carvalho, Fernando C Jerep   +2 more
doaj   +1 more source

AI‐Assisted Morphometric Analysis and Molecular Phylogeny for a Dactylogyrid (Monopisthocotyla) Skin Parasite of an Ornamental Crenuchid Fish From Brazil

Acta Zoologica, EarlyView.
ABSTRACT This study presents a formal description and taxonomic appraisal of Cacatuocotyle adrianoi sp. n., a Neotropical parasite belonging to the family Dactylogyridae, integrating AI‐assisted morphometric analyses, molecular data, and phylogenetic reconstruction. Phylogenetic analyses recovered Cacatuocotyle adrianoi sp. n.
J. C. C. Aguiar, M. M. Osaki‐Pereira, N. G. Silva, P. D. Mathews, R. J. Silva   +4 more
wiley   +1 more source