Consulta: subjectFacets:"Astyanax"
Registros recuperados: 11
Data/hora: 09/06/2024 12:39:21

REDESCRIPCION DE SACCOCOELIOIDES OCTAVUS SZIDAT 1970 Y S. BACILLIFORMIS SZIDAT, 1973 (DIGENEA, HAPLOPORIDAE), PARASITOS DE PECES DEL GENERO ASTYANAX BAIRD &amp;amp; GIRARD 1854 (PISCES: CHARACIDAE)
Provedor de dados: 72
Autores: Lunaschi,Lia I.
RESUMEN Se redescribe e ilustra a Saccocoelioides octavus &lt;A HREF="#szidat70"&gt;Szidat 1970&lt;/A&gt; y S. bacilliformis &lt;A HREF="#szidat73"&gt;Szidat, 1973&lt;/A&gt; (Digenea, Haploporidae) en base a material tipo depositado en la Colección Helmintológica del Museo Bernardino Rivadavia, Buenos Aires, Argentina. La descripción original de ambas especies es breve, imprecisa y los datos morfométricos de cada una están referidos a un solo espécimen. El estudio detallado de cinco especímenes tipo de S. octavus, colectados en los ciegos pilóricos de Astyanax fasciatus (Cuv.), del holotipo y siete paratipos de S. bacilliformis, colectados en los ciegos pilóricos de Astyanax bipunctatus, revela que ambas son morfológicamente y morfométricamente similares;...
Tipo: Journal article
Palavras-chave: Saccocoelioides octavus; Saccocoelioides bacilliformis; Haploporidae; Digenea; Astyanax; Characidae; Argentina.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382002000100005

Genetic variability in Astyanax altiparanae Garutti &amp;amp; Britski, 2000 (Teleostei, Characidae) from the Upper Paraná River basin, Brazil
Provedor de dados: 74
Autores: Peres,Maria Dolores; Vasconcelos,Marcio dos Santos; Renesto,Erasmo.
Allozyme data was used to assess the genetic diversity Astyanax altiparanae populations from the floodplain of the Upper Paraná River (PR). Specimens were collected in the southern Brazilian state of Paraná from PR in Porto Rico municipality and Ribeirão Ficha (RF) in Ubiratã municipality. The authors used 15% (w/v) corn starch gel electrophoresis to identify 21 putative loci for 13 enzymatic systems: Aspartate aminotransferase, 2.6.1.1 (AAT), Acid phosphatase, 3.1.3.2 (ACP), Esterase, 3.1.1.1 (EST), Glycerol-3-phosphate dehydrogenase, 1.1.1.8 (G3PDH), Glucose-6-phosphate dehydrogenase, 1.1.1.49 (G6PDH), Glucose-6-phosphate isomerase, 5.3.1.9 (GPI), Iditol dehydrogenase, 1.1.1.14 (IDDH), Isocitrate dehydrogenase - NADP+, 1.1.1.42 (IDH), L-Lactate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allozymes; Astyanax; Fishes; Genetic variability; Paraná River floodplain.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500011

Restriction fragment length polymorphisms of mitochondrial DNA among five freshwater fish species of the genus Astyanax (Pisces, Characidae)
Provedor de dados: 74
Autores: Moysés,Cinthia Bachir; Almeida-Toledo,Lurdes F. de.
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 analyzed. Two out of the ten restriction enzymes employed generated species-specific mtDNA patterns for each of the five species. MtDNA exhibited considerable polymorphism within and among populations. All populations sampled showed relatively high values of haplotype diversity. Geographically localized haplotypes were detected for A. altiparanae and A. fasciatus from the Upper Paraná and São Francisco...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: MtDNA; RFLP; Astyanax.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400008

Identification of Astyanax altiparanae (Teleostei, Characidae) in the Iguaçu River, Brazil, based on mitochondrial DNA and RAPD markers
Provedor de dados: 74
Autores: Prioli,Sônia M.A.P.; Prioli,Alberto J.; Júlio Jr.,Horácio F.; Pavanelli,Carla S.; Oliveira,Alessandra V. de; Carrer,Helaine; Carraro,Dirce M.; Prioli,Laudenir M.
Astyanax fishes are among the most important food-web components of South America rivers. In the Iguaçu River basin, the Astyanax genus is represented mainly by endemic species. For millions of years, that hydrographic basin has been geographically isolated from the Paraná River basin by the Iguaçu Falls. Recently, a species from the Upper Paraná River basin identified as Astyanax bimaculatus was revised and described as a new species named Astyanax altiparanae Garutti &amp;amp; Britski, 2000. Fauna endemism and geographic isolation triggered interest in investigations to evaluate the identification and genetic relatedness among two A. altiparanae populations from the Upper Paraná River basin and the population identified as A. bimaculatus in the Iguaçu...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax; Fish; D-loop; Control region; Mitochondrial DNA; RAPD.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400011

Satellite DNA sites in four species of the genus Astyanax (Teleostei, Characiformes)
Provedor de dados: 74
Autores: Kavalco,Karine Frehner; Pazza,Rubens; Bertollo,Luiz Antonio Carlos; Moreira-Filho,Orlando.
Cytogenetic data about satellite DNA distribution in four Astyanax species (Characidae) from the Paraitinga river, Paraíba do Sul river basin, Brazil, are presented. In order to characterize the constitutive heterochromatin, C-banding, chromomycin A3 and DAPI fluorescence staining, as well as fluorescence in situ hybridization (FISH) with the satellite DNA As-51 probe were performed. A. scabripinnis and A. parahybae presented 2n = 50 and 2n = 48 chromosomes, respectively. The heterochromatin was located in the pericentromeric and terminal regions of many chromosomes, corresponding to GC-positive regions and to the As-51 satellite DNA in terminal regions. A. intermedius and A. giton, both with 2n = 50 chromosomes, showed little heterochromatin, mostly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax; Fluorescence in situ hybridization (FISH); Heterochromatin; Karyotypic diversity; Satellite DNA.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400005

Ocorrência e ecologia trófica de quatro espécies de Astyanax (Characidae) em diferentes rios da bacia do rio Tibagi, Paraná, Brasil
Provedor de dados: 76
Autores: Bennemann,Sirlei Terezinha; Gealh,Ana Maria; Orsi,Mário Luís; Souza,Leda Maria de.
Na bacia do rio Tibagi, trechos dos rios Fortaleza, Iapó e Tibagi foram amostrados mensalmente, de maio de 2001 a abril de 2002, com tarrafas e redes de espera de diferentes malhagens. Foram capturados indivíduos de quatro espécies de Astyanax. Para conhecer como essas espécies utilizam o hábitat desses rios, foi calculada a constância, e as freqüências em número de exemplares foram comparadas pela análise de similaridade Bray-Curtis. A composição percentual dos alimentos consumidos foi ordenada usando-se a Análise de Componentes Principais (ACP). As proporções dos recursos alimentares foram avaliadas e classificadas quanto à natureza (animal ou material vegetal) e origem (alóctone e autóctone). A constância e a baixa similaridade na abundância revelaram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax; Ecologia trófica; Bacia do rio Tibagi; Rios.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000300004

Effects of Biodegradable Detergents in the Accumulation of Lipofuscin (Age Pigment) in Gill and Liver of Two Neotropical Fish Species
Provedor de dados: 77
Autores: Pereira,Bruno Fiorelini; Alves,Anderson Luis; Senhorini,José Algusto; Rocha,Rita de Cássia Gimenes de Alcântara; Pitol,Dimítrius Leonardo; Caetano,Flávio Henrique.
Currently there is a growing concern, in both population and governments, to identify the effects of substances commonly disposed of into rivers and lakes, on aquatic fauna and flora. Thus the objective of the present study was to verify effects of biodegradable detergents and water from an urban lake on gills and liver of two neotropical fish species of great economic importance, Astyanax altiparanae and Prochilodus lineatus. In order to do so, lipofuscin, also called the ageing pigment, was used as bioindicator. After one and five months of experiment both tissues accumulated this pigment. These data are discussed from physiological points of view, related with lipid peroxidation and mitochondrial damage.
Tipo: Journal article
Palavras-chave: Lipofuscin; Liver; Gill; Prochilodus; Astyanax.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300005

Minilernaea floricapitella gen. nov., sp. nov. (Copepoda, Lernaeidae) from freshwater fishes of Southern Brazil
Provedor de dados: 104
Autores: Thatcher,Vernon E.; Huergo,Giuliano M.
Minilernaea floricapitella gen. nov., sp. nov. (Copepoda, Cyclopoida, Lernaeidae) a parasite of the freshwater fishes, Astyanax spp. and Corydoras ehrhardti Regan, 1912 of Santa Catarina and Paraná States, Brazil, is described, based on 10 postmetamorphic females. The new genus and species has the following characteristics that distinguish it from all other known lernaeids: (1) The body is very small (3.4-5.8 mm in length); (2) The head is provided anteriorly with six lobes and posteriorly with four undivided anchor arms. (3) The first pair of thoracopods is on the head, 2-4 are all on the "neck"; (4) Thoracopod 5 is reduced to a simple papillus near the genital pores; (5) The genital pores are equatorial in the hindbody and there is no pre-genital...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax; Copepod parasite; Corydoras; Southern Brazil.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400001

Population structure of two Astyanax Baird &amp;amp; Girard, 1854 (Teleostei, Characidae) species from upper Paraguaçu river
Provedor de dados: 52
Autores: Santos,Alexandre Clistenes de Alcântara; Novaes,José Luís Costa.
The fishes of the family Characidae are among the main species of fresh water fishes in South America. In this work, some aspects of the population structure of two Astyanax species were assessed. The fishes were caught in Santo Antônio and São José rivers, in the Paraguaçu basin, by standardized monthly samplings adapted to the microhabitats. Astyanax sp. b (São José river) presented larger size than Astyanax sp. a (Santo Antônio river). The length-weight relationship showed positive allometric growth for Astyanax sp. a, and negative for Astyanax sp. b. Both the species showed a long reproductive period, with higher activities in dry period.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax; Characidae; Chapada Diamantina; Paraguaçu River; Population structure.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100013

Diet of Astyanax species (Teleostei, Characidae) in an Atlantic Forest River in Southern Brazil
Provedor de dados: 52
Autores: Vilella,Fábio Silveira; Becker,Fernando Gertum; Hartz,Sandra Maria.
Feeding habits of six species of Astyanax from river Maquiné are described. Fishes were sampled bi-monthly from November/95 to September/96 in two zones of the river. Items were identified, counted and had their abundance estimated according to a semi-quantitative scale. Frequency of occurrence, alimentary importance index (IFI) values and a similarity analysis of diets for each species-river zone sample were examined. All the species were considered typically omnivorous, with insects and vegetal matter being the most important items in their diet. These species could act as seed dispersers, particularly for macrophytes. Intra-specific spatial differences were not observed in comparisons of samples from two diferent regions of the river, except for A....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet; Seed dispersal; Fish; Astyanax; Atlantic Forest; Brazil.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200015

Frequency in the supply of Lactobacillus influence its probiotic effect for yellow tail lambari
Provedor de dados: 65
Autores: Jatobá,Adolfo; Moraes,Klayton Natan; Rodrigues,Emanuel Fernandes; Vieira,Leandro Marcolino; Pereira,Marina Oliveira.
ABSTRACT:  The aim of this research was to evaluate the changes in intestinal tract microbiota, hematological parameters and zootechnical indexes of yellowtail lambaris (Astyanax bimaculatus) fed with different probiotic supply frequencies (Lactobacillus spp.). Lambaris (1,200) were distributed in twelve boxes, divided in three treatments, 100% supply; 25% and 0% (control) of feeds supplemented with probiotic. After 87 days, fish fed with supplemented diet, regardless of frequency (100% and 25%), showed an increase in the total lactic acid bacteria count of 7.99±0.15 log CFU mL-1 and 7.04±1, 29 log UFC mL-¹ respectively, in the intestinal tract and decrease of Pseudomonas spp. in both 100% and 25% (4.09±0.84log UFC mL-1 and 4.00±1.12log UFC mL-1,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food handling; Lactic acid bacteria; Astyanax; Hematology; Microbiota.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001000652