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| Registros recuperados: 14 | |
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| Leuzzi,Maria Sueli Papa; Almeida,Fernanda Simões de; Orsi,Mário Luís; Sodré,Leda Maria Koelblinger. |
| In this study, the RAPD technique was used to analyze the genetic structure of populations of the fish Astyanax altiparanae (Characidae, Tetragonopterinae) living in the lower, middle and upper Paranapanema River, Brazil. The aim was to assess this structure regarding fish handling and conservation programs. The genetic variability (P) was found to be 42.64%, 75% and 75% in the low, middle and upper reaches, respectively. The dendrogram of genetic similarity, obtained by comparative analysis of the sets of samples from the three sites, showed the formation of three clusters. All of the genetic parameters used indicate that the population in the lower Paranapanema is genetically different from those in the middle and upper sections. The theta P test shows... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax altiparanae; RAPD; Genetic structure; Genetic conservation; Fish. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300009 |
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| Cassemiro, Fernanda Aparecida da Silva; UEM; Hahn, Norma Segatti; UEM; Fugi, Rosemara; UEM. |
| Esse estudo objetivou avaliar a dieta de Astyanax altiparanae (Osteichthyes, Tetragonopterinae) no ambiente natural e após a formação do reservatório de Salto Caxias, rio Iguaçu, Estado do Paraná, Brasil, a fim de investigar a adaptabilidade trófica da espécie. As coletas foram realizadas de março/97 a fevereiro/00 resultando na obtenção de 582 estômagos, cujos itens alimentares foram quantificados, volumetricamente. Na fase rio, a espécie mostrou forte tendência à herbivoria, e após o represamento, uma dieta onívora. Na análise de agrupamento (DCA), formaram-se grupos temporais distintos: o primeiro agrupou alguns exemplares coletados na fase rio com dieta mais especializada e o segundo, exemplares coletados após o represamento e que apresentaram dieta... |
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Palavras-chave: 2.00.00.00-6 Ciências Biológicas dieta; Astyanax altiparanae; Variações temporais; Reservatório 2.00.00.00-6 Ciências Biológicas. |
| Ano: 2002 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2314 |
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| Silva,Elyara Maria Pereira-da; Oliveira,Ricardo Henrique Franco de; Ribeiro,Maria Angélica Rosa; Coppola,Milena Pereira. |
| Para avaliar o efeito anestésico do óleo de cravo em lambaris (Astyanax altiparanae), cinco grupos de 30 alevinos (0,6±0,1g) foram expostos às concentrações de 50, 75, 100, 125 e 150mg L-1, medindo-se, respectivamente: tempo de indução à anestesia profunda (caracterizada pela perda de equilíbrio, pela ausência de natação, pela redução dos movimentos operculares e pelas respostas apenas a estímulos táteis mais intensos), tempo de recuperação e taxa de mortalidade após a exposição. Em uma segunda etapa (10 peixes/tratamento), registraram-se, para cada concentração, os tempos de indução e de recuperação após anestesia cirúrgica (movimentos operculares lentos e irregulares e perda de reações a estímulos), anotando-se a mortalidade após seis minutos de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eugenol; Astyanax altiparanae; Manejo; Anestesia. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000600033 |
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| Bem,Jaqueline Cristina de; Fontanetti,Carmem Silvia; Senhorini,José Augusto; Parise-Maltempi,Patricia Pasquali. |
| The objective of this study was to evaluate the effectiveness of estradiol valerate in an attempt to feminize the male Astyanax altiparanae. One thousand newly-hatched larvae were randomly distributed in four incubators. During a period of 30 days, estradiol valerate was administered in different dosages (20, 40, and 80 mg/kg of diet); the control group did not receive hormone in the diet. After 161 days of hatching, biometry was performed on 50 fishes per treatment group, and the gonads were analyzed. The hormone treatments were effective in feminizing A. altiparanae, achieving 70-76% of the desired sex, while the control treatment had 44% females. The hormone did not affect the growth of fish. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax altiparanae; Characidae; Feminization; Sex Reversion; Estrogen. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200015 |
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| Hashimoto,Diogo Teruo; Gonçalves,Vanessa Regina; Bortolozzi,Jehud; Foresti,Fausto; Porto-Foresti,Fábio. |
| Several species of the genus Astyanax have already been genetically studied, and B-chromosomes have been considered to be an interesting feature in some species of this group. In the present paper we report, for the first time, the occurrence of a B microchromosome in a natural population of A. altiparanae. This additional genomic element was identified as an acrocentric chromosome, similar in size to the smallest chromosomal pairs of the standard karyotype. Analysis of the constitutive heterochromatin pattern by C-banding evidenced heterochromatic blocks located on centromeric, pericentromeric, and interstitial regions of some chromosomes, and also positive marks in a subtelocentric chromosomal pair that presented the short arms entirely heterochromatic.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: B chromosomes; Fish cytogenetics; Astyanax altiparanae. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200021 |
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| Dourado,Priscila Leocádia Rosa; Rocha,Monyque Palagano da; Roveda,Liriana Mara; Raposo Junior,Jorge Luiz; Cândido,Liliam Sílvia; Cardoso,Claudia Andréa Lima; Morales,Maria Aparecida Marin; Oliveira,Kelly Mari Pires de; Grisolia,Alexeia Barufatti. |
| Abstract This study aimed to evaluate DNA damage in animal and plant cells exposed to water from the Água Boa stream (Dourados, Mato Grosso do Sul, Brazil) by using bioassays, and to identify the chemical compounds in the water to determine the water quality in the area. Through the cytotoxicity bioassay with Allium cepa, using micronucleus test, and comet assay, using Astyanax altiparanae fish, the results indicated that biological samples were genetically altered. Micronuclei were observed in erythrocytes of A. altiparanae after exposure to water from locations close to industrial waste discharge. The highest DNA damage observed with the comet assay in fish occurred with the exposure to water from locations where the presence of metals (Cu, Pb, Cd, Ni)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Astyanax altiparanae; Mutagenicity; Cytotoxicity; Genotoxicity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000100123 |
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| Camargo,Aline de Almeida; Negrelli,Débora Caroline; Pedro,Natacha Heloísa Olavo; Azevedo,Rodney Kozlowiski de; Silva,Reinaldo José da; Abdallah,Vanessa Doro. |
| ABSTRACT: In March 2010, 44 specimens of Astyanax altiparanae Garutti & Britski, 2000, commonly known as "lambari do rabo amarelo", collected from the Peixe river in the state of São Paulo, Brazil were analyzed. Out of these 44 fishes, 38 had at least one species of metazoan parasite. Fifteen metazoan parasites species were collected and identified: Urocleidoides trinidadensis , Diaphorocleidus kabatai , Diaphorocleidus orthodusus, Diaphorocleidus sp., Urocleidoides sp., Trinibaculum altiparanae , Gyrodactylus sp., Jainus hexops, Contracaecum sp., Procamallanus (Spirocamallanus) inopinatus, Vaigamus sp., Amplexibranchius bryconis, Ergasilus sp., Zonocotyloides haroltravassossi and Henneguya sp. Six species of parasites presented a prevalence of over... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax altiparanae; Lambari; Peixe river; Parasite; Brazil.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500876 |
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| Gomiero, Leandro Muller; Unesp Rio Claro; Braga, Francisco Manoel de Souza; UNESP. |
| Este trabalho caracterizou a alimentação natural de Astyanax altiparanae na sub-bacia do rio Corumbataí e bacia do rio Jacaré-pepira, com enfoque principal na ingestão de sementes de Croton urucurana. Os itens alimentares de Astyanax altiparanae, em ordem decrescente de Grau de Preferência Alimentar (GPA), foram: insetos alóctones, restos de insetos, material vegetal alóctone, sementes de Croton urucurana, insetos autóctones, sedimentos, material vegetal autóctone, escamas, ovócitos e aracnídeos. Sementes de Croton urucurana ocorreram no verão, época de cheia dos rios. Sugere-se que Astyanax altiparanae seja um dispersor secundário das sementes de Croton urucurana, sendo que a intensidade e a efetividade dessa dispersão devem, ainda, ser investigadas |
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Palavras-chave: 2.01.00.00-0 Biologia Geral alimentação natural; Astyanax altiparanae; Dispersor; Sementes; Croton urucurana 2.01.00.00-0 Biologia Geral. |
| Ano: 2003 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2045 |
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| Vidotto, Ana Paula; UNESP; Carvalho, Edmir Daniel; UNESP. |
| The aim of this study is to characterize some population biology parameters of P. squamosissimus, A. altiparanae and S. maculates, the dominant fish species of the Santa Bárbara river, a tributary of the Nova Avanhandava reservoir, low Tietê river. Fish samplings were performed monthly between September/2002 and August/2003, using gill nets with different mesh sizes. Females of all species have larger standard lengths than males (Mann-Whitney, p < 0.0001), and are more frequent in superior size classes (Kolmogorov-Smirnov, p < 0.0001). All populations presented isometric growth, but differences between males and females were observed. Only P. squamosissimus presented a gender ratio different from 1:1, with a higher proportion of males (1:2,... |
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Palavras-chave: 2.01.00.00-0 Biologia Geral reservoir; Tietê river; Population biology; Plagioscion squamosissimus; Astyanax altiparanae; Serrasalmus maculatus Recursos Pesqueiros e Engenharia de Pesca. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/650 |
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| Natori,Mariene Miyoko; Alves,Rachel Cristina Prehl; Oliveira,Ricardo Henrique Franco de; Segura,Julio Guerra; Viegas,Elisabete Maria Macedo. |
| ABSTRACT: The inclusion of sesame oil associated with soybean, linseed and freshwater fish residue oil in the diets fed to Lambaris Astyanax altiparanaewas evaluated by the growth performance parameters, body composition and possible physiological changes (GARUTTI & BRISTSKI, 2000). The experiment was a completely randomized design in two factorial parameters tested: three oil types (soy oil (SO), linseed oil (LO) and freshwater fish residue oil (FRO)), combined or not with sesame oil (SEO), totalizing six treatments and four replications 24 cages, capacity of 0.70m3 (density of 251 fish m-3). The fish (mean weight 2.35g±0.62g and mean length 5.25cm±0.68cm) were fed with the experimental diets twice a day. After 75 days, the following parameters were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax altiparanae; Fatty acids; Nutrition; Sesamin.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701274 |
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| Registros recuperados: 14 | |
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