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	Provedor de dados Zoologia (1) Genet. Mol. Biol. (1) Neotropical Ichthyology (1) Autor Abel,Luciano Douglas dos Santos (1) Buckup,Paulo A. (1) Chini,Helena A.S. (1) Garcia,José Antônio Dias (1) Maistro,Edson Luis (1) Mantovani,Monique (1) Melo,Filipe A. G. de (1) Moreira-Filho,Orlando (1) Quagio-Grassiotto,Irani (1) Mais... Palavra-chave Astyanax fasciatus (3) As51 (1) Astyanax scabripinnis (1) C-banding (1) Characidae (1) Cytochemical (1) Fish (1) Fluorescence in situ hybridization (FISH) (1) Freshwater (1) Oogenesis (1) Rio Jacuí (1) Satellite DNA (1) Species complex (1) Taxonomy (1) Teleostei (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2006 (2) 2001 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Astyanax henseli, a new name for Tetragonopterus aeneus Hensel, 1870 from southern Brazil (Teleostei: Characiformes) Neotropical Ichthyology Melo,Filipe A. G. de; Buckup,Paulo A.. Tetragonopoterus aeneus Hensel (1870) is removed from synonymy with Astyanax fasciatus (Cuvier, 1819), revalidated and redescribed as A. henseli to avoid homonymy. Astyanax henseli differs from A. fasciatus stricto sensu and other Astyanax species by the presence of two to four maxillary teeth, two vertically-elongated humeral spots, dentary tooth cusps positioned close to one another, and the slender form of the dentary teeth. Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxonomy; Astyanax fasciatus; Species complex; Rio Jacuí; Fish; Freshwater. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100003 Chromosomal distribution of the As51 satellite DNA in two species complexes of the genus Astyanax (Pisces, Characidae) Genet. Mol. Biol. Abel,Luciano Douglas dos Santos; Mantovani,Monique; Moreira-Filho,Orlando. The chromosomal localization of the As51 satellite DNA was identified by fluorescent in situ hybridization (FISH) in specimens of the characid fish Astyanax scabripinnis and Astyanax fasciatus, which are considered species complexes because of their extensive karyotypical and morphological variability. A conserved chromosomal distribution of the As51 satellite, coincident with distal C-banded segments was demonstrated. The alternative interstitial localization of this satellite DNA and possible alterations of its structure suggest that this sequence underwent quantitative, positional and structural variations, as the A. scabripinnis and A. fasciatus complexes diverged. Tipo: Info:eu-repo/semantics/article Palavras-chave: As51; Astyanax scabripinnis; Astyanax fasciatus; Fluorescence in situ hybridization (FISH); C-banding; Satellite DNA. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300008 Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil Zoologia Garcia,José Antônio Dias; Chini,Helena A.S.; Maistro,Edson Luis; Quagio-Grassiotto,Irani. Oogenesis involves a set of transformations which are undergone by female germ cells These cells change into oogonias and then into mature oocytes. Sexually mature female fish were collected monthly, during one year, from the Sapucaí River, a tributary of the Rio Grande, which is part of the Furnas Reservoir in the state of Minas Gerais. During the several stages of maturation, we observed small round oogonias with a large nucleus, a single nucleolus, and weakly stained cytoplasm with eosinophilic granules. The primary oocytes showed a large basophilic nucleus, with a developed peripheral nucleolus and a reduced cytoplasm. The previtellogenic oocytes presented voluminous cytoplasm and nucleus with several small peripheral nucleoli. The oocytes underwent... Tipo: Info:eu-repo/semantics/article Palavras-chave: Teleostei; Characidae; Astyanax fasciatus; Oogenesis; Cytochemical. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400003 Registros recuperados: 3 Primeira ... 1 ... Última

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