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| Registros recuperados: 13 | |
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| Chini,Helena A.S.; Garcia,José Antônio Dias; Maistro,Edson Luis; Quagio-Grassiotto,Irani. |
| Oogenesis involves a sequense of transformations which are undergone by female germ cells. These cells change into oogonias and then into mature oocytes. Sexually mature females were collected monthly, during one year, from the Rio Sapucaí, tributary of the Rio Grande, which is part of the Furnas Reservoir system in the state of Minas Gerais. The observed material showed that oogonias were small spherical cells, had a big spherical nucleus, with a single nucleolus, and weakly stained cytoplasm with eosinophilic granules (FG stained), which indicate their protein content. The primary oocytes showed a big basophilic nucleus, with a large peripheral nucleolus, and several smaller nucleoli. They show a reduced cytoplasmic content. The previtellogenic oocytes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teleostei; Anostomidae; Leporinus striatus; Oogenesis; Cytochemical. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400004 |
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| SANTOS,Geraldo M. dos; JEGU,Michel. |
| O presente estudo trata do inventário, descrição e ilustração das espécies de anostomídeos da bacia do rio Uatumã. Ele foi desenvolvido com base na coleção de peixes do INPA, montada a partir de um intenso programa de coletas, na bacia do Uatumã, nas áreas de influência das usinas hidrelétricas de Balbina e Pitinga, ambas no estado do Amazonas. Para a maioria das espécies são feitos comentários sobre os caracteres diagnósticos, área de distribuição, biótopos preferenciais e principais variações do padrão de colorido entre adultos e jovens. As vinte e duas espécies identificadas pertencem a 8 gêneros, sendo Leporinusdominante, com 12 espécies, seguido de Laemolyta, Anostomuse Pseudanos,com duas e de Schizodon, Anostomoides, Synaptolaemuse Gnathodolus,com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ictiofauna; Amazônia; Anostomidae. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671996000300151 |
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| Padilha, Geraldo Eustáquio Valente; Faculdade de Ciências, Filosofia e Letras do Alto São Francisco / Faculdade Pitágoras; Carvalho, Júnia Aparecida Bernardes Afonso de; Faculdade de Ciências, Filosofia e Letras do Alto São Francisco; Boncompagni-Júnior, Orion; Faculdade de Ciências, Filosofia e Letras do Alto São Francisco; Domingos, Fabrício Flávio Theophilo; Universidade Federal de Minas Gerais; Thomé, Ralph Gruppi; Universidade Federal de São João Del Rei / Universidade Federal de Juiz de Fora. |
| Reproductive activity of ‘piau gordura’ Leporinus piau was studied using biometric, macroscopic and microscopic analysis. A total of 74 specimens of L. piau were collected quarterly from January to December 2005 in a small deactivated hydropower plant located at Jorge Pequeno Stream and preserved in a fixative solution until analysis. The alterations after fixation were evaluated. The stages of gonadal maturation were determined by histology and gonadosomatic index (GSI). The females and males in the spawning capable and regressing stage were registered from October to December. L. piau is total spawning and the HSI (hepatossomatic index), SRI (stomach repletion index) and CFI (coelomic fat index) of females and males did not showed a statistical... |
| Tipo: Morphological studies |
Palavras-chave: Anostomidae; Reproduction; Biological indexes; Tributary; São Francisco river. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17675 |
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| Santos,Marcella L. Dos; Arantes,Fábio P.; Santiago,Kleber B.; Santos,José E. Dos. |
| The digestive tracts of 44 specimens of Schizodon knerii were studied using anatomical, histological and histochemical techniques. The mouth has terminal position, the lip epithelium is squamous stratified with mucous, claviform cells and taste buds, teeth have an incisive form and the tongue has a stratified squamous epithelium with mucous cells and taste buds. The oropharynx cavity is formed by gill apparatus and pharyngeal teeth. The oesophagus presented pleated mucosa, a stratified squamous epithelium with mucous cells, oesophageal glands and taste buds. The stomach presented cardiac, fundic and pyloric regions, simple prismatic epithelium with tubular glands, with none in the pyloric region. The intestine contains 11-15 pyloric caeca, a simple... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anostomidae; Digestive tract; Fish; Morphology. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200867 |
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| SANTOS,Geraldo M.; JÉGU,Michel; LIMA,Álvaro C.. |
| A área de distribuição de Leporinus pachycheilusBritski, 1976 (Teleostei, Anostomidae), descrita do rio Aripuanã, é ampliada para os rios Jamari e Machado, ambos afluentes do Madeira, assim como para os rios Uatumã, Araguari e Tocantins. Esta espécie apresenta alta variabilídade intra e inter-populacional no padrão de colorido, mas a consistência dos caracteres morfológicos indica que se trata de um grupo bem definido e não distinto do material descrito para a localidade tipo (rio Aripuanã). Uma nova espécie (Leporinus juliisp.n.) é descrita para os rios Xingu e Trombetas. Esta é muito semelhante a L. pachycheilus,mas difere basicamente pelo maior número de escamas ao redor do pedúnculo caudal (16 contra 12) e pelo padrão de colorido, formado por manchas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Peixes; Anostomidae; Taxonomia; Amazônia. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671996000400265 |
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| Garavello,Júlio Cesar; Britski,Heraldo Antonio. |
| ABSTRACT Schizodon dissimilis is redescribed on the basis of syntypes and non-type specimens from the Parnaíba, Jaguaribe and Mearim rivers, and lectotype and paralectotypes are designated. Schizodon dissimilis is distinct from the Amazonian and southeastern Brazil congeners by having four dark brown vertical bars without a midlateral dark brown stripe or a dark blotch on caudal peduncle. When compared with the northeastern Brazilian Schizodon and those from the São Francisco river, and with the remaining dark barred species S. australis, S. borellii, S. corti, S. fasciatus and S. intermedius, it is diagnosed by a combination of lateral line scale counts, color pattern and body proportions. The color pattern distinguishes S. dissimilis from S. fasciatus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anostomidae; Brazil; Rio Parnaíba; Species; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300201 |
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| Burns,Michael D.; Chatfield,Marcus; Birindelli,José L. O.; Sidlauskas,Brian L.. |
| ABSTRACT Members of the Leporinus desmotes species complex can be distinguished from other barred or banded congeners by the combination of nine distinct black bars across the head and trunk and long, pointed, laterally compressed and upward curving symphyseal dentary teeth. A taxonomic reassessment of this complex revealed two new species, one from the Orinoco and Negro rivers of Venezuela and Brazil, and the other from the Xingu and Tapajós rivers of Brazil. Both species are similar to L. desmotes and L. jatuncochi, but differ significantly in body shape morphology, coloration, and/or circumpeduncular scale counts. Genetic evidence also contributes to the recognition of both new species. This contribution also maps the geographic distribution of the four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anostomidae; Characiformes; Morphology; South America; Taxonomy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200219 |
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| Registros recuperados: 13 | |
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