Results 11 to 20 of about 76 (55)

Fatores abióticos que afetam a distribuição do gênero Astyanax Baird & Girard, 1854 em riachos de cabeceiras de Chapada dos Guimarães, bacia do rio Cuiabá, Mato Grosso

open access: yesBioscience Journal, 2011
Os principais fatores que influenciam a distribuição de uma espécie estão relacionados principalmente com a capacidade de dispersão, o comportamento, a presença de outras espécies e aos fatores físico-químicos.
Mahmoud Mehanna, Jerry Penha
doaj   +5 more sources

Chromosomal organization of retrotransposon Rex1 in Astyanax species (Characiformes, Characidae)

open access: yes, 2018
The cytogenetic studies of retrotranposons Rex have been characterized in several fish groups, including species of the Astyanax genus. This group presents an extensive variability in their karyotype, with diploid numbers of 2n = 52, 50, 48, 46 and 36 ...
Silva, Edson L. da [UNESP]   +13 more
core   +1 more source

Astyanax Baird & Girard

open access: yes, 2006
[[Astyanax Baird & Girard]] The genus Astyanax Baird & Girard includes more than 100 nominal species (Garutti & Britski, 2000) distributed from southern United States to the Río Negro in Argentina (Almirón et al., 1997).
M. D. L. M. Azpelicueta   +2 more
core   +1 more source

Diversidade em seqüências da região controle do DNA mitocondrial de populações de Astyanax da Bacia do Alto Rio Paraná [PDF]

open access: yes, 2004
A fish species considered typical of the Upper Paraná River basin is the species Astyanax altiparanae Garutti e Britski, 2000, previously known as Astyanax bimaculatus.
Soria, Thatiana Vanessa
core   +1 more source

Highly similar morphologies between chromosomes bearing U2 snRNA gene clusters in the group Astyanax Baird and Girard, 1854 (Characiformes, Characidae): An evolutionary approach in species with 2n = 36, 46, 48, and 50

open access: yes, 2016
Repetitive sequences and their chromosomal locations have been widely studied in species of the Astyanax genus. However, the chromosomal organization of U2 snDNA remains largely unknown.
Parise-Maltempi, Patricia Pasquali [UNESP]   +4 more
core   +1 more source

Dieta de Astyanax asuncionensis (Characiformes, Characidae), em riachos da bacia do rio Cuiabá, Estado do Mato Grosso = Diet of Astyanax asuncionensis (Characiformes, Characidae), in streams of the Cuiabá river basin, Mato Grosso State

open access: yesActa Scientiarum: Biological Sciences, 2008
A dieta de Astyanax asuncionensis, em riachos da bacia do rio Cuiabá, Estado do Mato Grosso, durante períodos de chuva e seca, foi descrita, sendo suas variações associadas ao grau de integridade da vegetação ciliar.
Cristina da Silva Borba   +3 more
doaj  

Chromosomal mapping of H3 histone gene cluster and 5S rRNA genes in eight Astyanax (Pisces, Characiformes) species with different diploid numbers: syntenic conservation of repetitive genes

open access: yes, 2015
The Astyanax genus is widely distributed from southern United States to northern Patagonia, Argentina. While cytogenetic studies have been performed for this genus, but little is known about the histone gene families. The aim of this study was to examine
Parise-Maltempi, Patricia Pasquali [UNESP]   +4 more
core   +1 more source

Estudos evolutivos no gênero Astyanax (Characiformes, Characidae): análises comparativas baseadas nos diferentes números diploides descritos para o gênero

open access: yes, 2016
O gênero Astyanax atualmente é visto como um grupo com incertezas filogenéticas, configurando-se até o presente momento como polifilético dentro da família Characidae.
Piscor, Diovani
core   +1 more source

Astyanax erythropterus

open access: yes, 2010
Astyanax erythropterus (Holmberg, 1891) Figs. 1-4 Diagnosis. Astyanax erythropterus is distinguished from all species of the genus, except A. pelegrini, by the presence of a long anal fin bearing 38 to 42 branched rays (vs.
Almirón, Adriana   +4 more
core   +1 more source

differs between divergent habitats in the Pantanal wetlands

open access: yes, 2016
This study investigated whether the body morphology of the tetra fish Astyanax lacustris ( previously Astyanax asuncionensis) varied between populations inhabiting one lagoon ( a lentic, shallow environment, with great habitat complexity created by ...
L. E. R. Tavares   +7 more
core   +1 more source

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