Astyanax Lacustris
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. Physical mapping of the 18S and 5S ribosomal genes in nine Characidae species (Teleostei, Characiformes)
Characidae is one of the largest fish families of the Neotropical region, and presenting a pronounced morphological variability, certainly does not constitute a monophyletic group. The cytogenetical data also show a large chromosomal variation and can provide important information for a better understanding of the relationships between the species of this gr
Genetics and Molecular Biology. Publicado em: 2008
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14. Variação cariotípica de Astyanax bimaculatus (Linnaeus, 1758) (Pisces: Characidae) nas bacias costeiras do Brasil / Karyotypic variation of Astyanax bimaculatus (Linnaeus, 1758) (Pisces: Characidae) in the coastal basins of Brazil
The genus Astyanax comprises 90 species considered together with most of the old Tetragonopterinae as incertae sedis within the family Characidae. Most of the Astyanax are small, were classified in an artificial taxonomic system and therefore their taxonomic boundaries are poorly defined. Seven coastal populations of one of these species, Astyanax bimaculatu
Publicado em: 2008
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15. Estudos evolutivos no gênero Astyanax (Pisces, Characidae) / Evolutionary studies in the Astyanax genus (Pisces, Characidae).
Astyanax is one of the species-richest genera within the order Characiformes. More than 100 representatives are widespread throughout nearly all the Neotropical region, inhabiting an array of environments, such as mountain areas, lotic and lentic river portions, lake systems and headwaters. This fish group has been a target of chromosomal studies for over 30
Publicado em: 2008
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16. Composição, abundância e dinâmica reprodutiva e alimentar de populações de peixes de um reservatório recém-formado (UHE - Capim Branco I / MG)
The loss of diversity is one of the main damage to the environment caused by the construction of reservoirs and it is related to the disappearance of terrestrial habitats by flooding, and the changes produced in the aquatic habitat. These changes reflect, above all, in the availability of food and in the reproduction of the fish species, leading to a remarka
Publicado em: 2008
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17. ComposiÃÃo, abundÃncia e dinÃmica reprodutiva e alimentar de populaÃÃes de peixes de um reservatÃrio recÃm-formado (UHE - Capim Branco I / MG)
The loss of diversity is one of the main damage to the environment caused by the construction of reservoirs and it is related to the disappearance of terrestrial habitats by flooding, and the changes produced in the aquatic habitat. These changes reflect, above all, in the availability of food and in the reproduction of the fish species, leading to a remarka
Publicado em: 2008
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18. A fauna de peixes na bacia do Rio Peruípe, extremo Sul da Bahia
A riqueza hidrológica no Extremo Sul da Bahia é contrastante em relação à ainda pouco conhecida fauna de peixes. Impressiona a presença de diversas espécies ainda não descritas. O presente estudo é parte de uma série que pretende avaliar os sistemas hídricos do Extremo Sul da Bahia do ponto de vista da ictiofauna nas diversas bacias. Aqui são inv
Biota Neotropica. Publicado em: 2007
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19. Reproductive strategies and genetic variability in tropical freshwater fish
We estimated the genetic variability of nine fish species from the Brazilian upper Paraná River floodplain (Astyanax altiparanae, Hoplias malabaricus, Leporinus lacustris, Loricariichthys platymetopon, Parauchenipterus galeatus, Pimelodus maculatus, Rhaphiodon vulpinus, Roeboides paranensis and Serrasalmus marginatus) based on data for 36 putative allozyme
Genetics and Molecular Biology. Publicado em: 2007
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20. Composição e distribuição da ictiofauna de tributários do Rio Mogi Guaçu e do Rio Corumbataí, Estado de São Paulo.
The composition and distribution of fish fauna from streams and creeks of Mogi Guaçu and Corumbataí river basins, at São Paulo State, were studied and compared. A watershed in the boundary of the geomorphological provinces Cuestas Basálticas and Depressão Periférica isolates the drainage systems of Mogi Guaçu and Tietê rivers, from which Corumbataí
Publicado em: 2006
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21. Análise da diversidade cariotípica de Characidae da bacia do São Fracisco.
A família Characidae consiste de aproximadamente 30 subfamílias, altamente diversificadas e, provavelmente, não compreendendo um grupo monofilético. No entanto, algumas subfamílias, em particular, podem constituir grupos monofiléticos, compartilhando especilalizações. No presente trabalho foram analisadas 9 espécies pertencentes a 6 gêneros de Char
Publicado em: 2005
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22. Restriction fragment length polymorphisms of mitochondrial DNA among five freshwater fish species of the genus Astyanax (Pisces, Characidae)
Restriction fragment length polymorphism (RFLP) analysis of mitochondrial DNA (mtDNA) was employed to characterize species and populations of Astyanax, a Neotropical freshwater fish genus. Samples of five species, A. altiparanae, A. fasciatus, A. lacustris, A. scabripinnis paranae and A. schubarti, from the Upper Paraná and São Francisco river basins were
Genetics and Molecular Biology. Publicado em: 2002