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| Registros recuperados: 40 | |
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| Pedreira, Marcelo Mattos; UFVJM; Sampaio, Edson Vieira; CODEVASF - Três Marias; Santos, José Cláudio Epaminondas dos; CODEVASF - Três Marias; Luz, Ronald Kennedy; UFMG. |
| O presente experimento avaliou o desempenho e sobrevivência de juvenis de matrinxã Brycon orthotaenia cultivados em tanques-rede de 4 m3, por 197 dias, em três densidades de estocagem: 20, 40 e 60 peixes m-3. Foram utilizados exemplares com 19,9 ± 0,3 cm de comprimento total e 90,0 ± 0,15 g de peso. Os animais foram alimentados com ração extrusada contendo 36% de proteína bruta. O comprimento total e o peso foram superiores (p < 0,05) na densidade de 20 peixes m-3. Valores intermediários e inferiores foram registrados para a densidade de 40 e 60 peixes m-3, respectivamente. A sobrevivência e o Fator de condição de Fulton foram semelhantes (p > 0,05) entre as diferentes densidades; porém, a biomassa produzida foi superior (p < 0,05)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.00.00.00-6 Ciências Biológicas rio São Francisco; Characidae; Tanques-rede; Espécie neotropical; Matrinxã 5.06.03.00-0 São Francisco river; Characidae; Floating Cage; Neotropical fish; Matrinxã. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/3687 |
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| SALARO,ANA LUCIA; OLIVEIRA JUNIOR,JOSÉ C.; LIMA,FREDERICO W.; FERRAZ,RENATO B.; PONTES,MARCELO D.; CAMPELO,DANIEL A.V.; ZUANON,JENER A.S.; LUZ,RONALD K.. |
| ABSTRACT The aim of this study was to evaluate commercial gelatin in the total replacement of bovine heart in feed training of "pacamã" Lophiosilurus alexandri in different water salinities. A completely randomized experimental design, in a 2 × 3 factorial arrangement, was performed using two types of moist ingredients (bovine heart and gelatin) and three water salinities (0.0; 2.0 and 4.0 g of salt L-1) with three replications. Juveniles (2.39 ± 0.08 cm standard length and 0.20 ± 0.03 g of weight) were conditioned to accept commercial diets by the technique of the gradual transition of ingredients. At the end of 36 days no differences were observed to weight gain, length gain and specific growth rate. The feed training efficiency was better (P < 0.05)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carnivorous fish; Feed training efficiency; Management efficiency; Neotropical fish. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502281 |
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| Teixeira,E.A.; Euler,A.C.C.; Faria,P.M.C.; Turra,E.M.; Luz,R.K.; Prado,S.A.; Takata,R.; Ribeiro,P.A.P.; Fontes,D.O.; Ribeiro,L.P.; Saliba,E.O.S.. |
| Most studies in nutrition for the South American catfish (surubim) were limited to the initial phase of development. However, it is clear that performance and nutrient utilization can change during the life stages of a fish. Therefore, this study aimed to evaluate the performance and nutrient utilization in juveniles of surubim fed diets varying in protein and energy levels. Two experiments were performed to test different levels of energy and protein in formulated diets. In the first experiment, surubim juveniles (89.2±4.8g) were fed five diets containing different levels of energy (18.0, 18.8, 19.6, 20.5, 21.3 MJ/kg). In the second experiment, juveniles (170.03±3.35g) were fed five diets containing different levels of protein (360, 400, 440, 480 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carnivorous species; Neotropical fish; Nutrition; Surubim. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000500031 |
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| Ohara,Willian Massaharu; Loeb,Marina Vianna. |
| Abstract The fishes herein included were collected in four small streams of the upper rio Tapajós basin. Through fieldwork carried out in 2011, 2013 and 2014 during the low water season 1.728 specimens belonging to 22 species distributed in 11 families, and five orders were captured. Characidae was the most representative family both in number of species and specimens captured. The most abundant species were Hyphessobrycon melanostichos, H. hexastichos, and H. notidanos. Five species are recognized as new, and four as endemic to the upper rio Tapajós basin. This study represents the first fish inventory for the region and will provide valuable information for the conservation of the poorly known diversity of fishes of the Chapada dos Parecis, in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: South America; Neotropical fish; Amazon; Endemism. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400302 |
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| Cardoso,Rodrigo Torres; Oliveira,Alexandre Kannebley de; Garavello,Julio Cesar. |
| This work aimed to study the composition and distribution of fish species at four sites along Cabeça River, an affluent of Corumbataí River, tributary of Tietê River, intending to better understand the influence of local geomorphology on the occurrence of the species along the river. Using gill nets, trawl net, cast net and sieves, five samples were taken from each site every two months. These data were analyzed from constancy of occurrence, similarity index of Jaccard, rarefaction analysis and descriptive statistical analysis of richness. 4,532 fish individuals belonging to six different orders, 17 families and 65 species were captured. Differences in composition, richness (diversity), abundance and frequency were observed at these sites along the river.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical fish; Upper Paraná River; Richness of species; Composition; Waterfalls. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200206 |
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| Peres,Wellington Adriano Moreira; Bertollo,Luiz Antonio Carlos; Moreira Filho,Orlando. |
| 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 group. 18S and 5S rDNA probes were used in the present study for the chromosomal mapping in different Characidae species from the São Francisco River (Astyanax lacustris, Astyanax scabripinnis, Hasemania nana, Piabina argentea, Orthospinus franciscensis, Serrapinnus heterodon, Serrapinnus piaba and Myleus micans) and Alto Paraná (Astyanax altiparanae) basins. Species with a single pair of chromosomes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cytogenetics; Neotropical fish; Fluorescent in situ hybridization (FISH); RDNA probe. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200009 |
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| Martinez,Emanuel Ricardo Monteiro; Zawadzki,Claudio Henrique; Foresti,Fausto; Oliveira,Claudio. |
| In this work, we analyzed the karyotypes of five species. Hypostomus cf. heraldoi, from the Mogi-Guaçu River, had 2n = 72 chromosomes, with a nucleolar organizer region (NOR) in one chromosomal pair. Hypostomus regani, from the Mogi-Guaçu River had 2n = 72 chromosomes with NORs in two chromosomal pairs. Hypostomus sp., from the Mogi-Guaçu River basin, had 2n = 68 chromosomes, with NORs in two chromosomal pairs. Hypostomus aff. agna, from Cavalo Stream, had 2n = 74 chromosomes with NORs in two chromosomal pairs. Hypostomus cf. topavae, from Carrapato Stream, had 2n = 80 chromosomes, with NORs in two chromosomal pairs. Hypostomus species showed marked diversity in the karyotypic formula, which suggested the occurrence of several Robertsonian rearrangements... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromosomes; Evolution; Hypostominae; Neotropical fish; NOR. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400006 |
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| Castro-ruiz, Diana; Andree, Karl B.; Solovyev, Mikhail M.; Fernández-méndez, Christian; García-dávila, Carmen; Cahu, Chantal; Gisbert, Enric; Darias, Maria J.. |
| Pseudoplatystoma punctifer is an Amazonian catfish highly appreciated for its high flesh quality, size, and commercial value. Its aquaculture is pursued to satisfy the demands of an increasing population in the region. However, knowledge of the nutritional needs during the early life stages is necessary for improving growth and reducing the incidence of cannibalism, factors that limit the success of its commercial farming. This study aimed at evaluating the influence of four diets containing different protein and lipid levels (30:15, 30:10, 45:15, or 45:10 in %) in the digestive physiology and performance of early juveniles. The results showed that the dietary protein:lipid as well as carbohydrate levels and ratios influenced differently the whole-body... |
| Tipo: Text |
Palavras-chave: Neotropical fish; Aquaculture; Digestive enzymes; Gene expression; Nutrition; Juveniles; Histology; Development; Macronutrients; Diet. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00678/79019/81420.pdf |
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| Bertaco,Vinicius A; Carvalho,Fernando R. |
| Hasemania kalunga is described from the upper rio Tocantins basin, Chapada dos Veadeiros, Goiás State, Brazil. The new species is distinguished from its congeners by the number of perforated lateral line scales (11-21 vs. 5-9, except from H. crenuchoides and H. piatan), by the presence of a black ver tically-elongate humeral spot (vs. absent, except from H. crenuchoides, H. nambiquara, and H. piatan), and by absence of scale sheath along anal-fin base (vs. presence, except from H. maxillaris, and H. piatan), by 19 principal caudal-fin rays (vs. 18 in H. piatan). It differs also from H. crenuchoides by morphometric data. The absence of scale sheath covering the anal-fin base, an uncommon character in Characidae, and the endemism of the ichthyofauna from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chapada dos Veadeiros; Endemism; Neotropical fish; Hasemania crenuchoides. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000100004 |
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| Bertaco,Vinicius A; Carvalho,Fernando R; Jerep,Fernando C. |
| Astyanax goyanensis (Miranda-Ribeiro, 1944), new combination, is redescribed based on the type series and topotypes, and A. courensis, new species, is herein described. Both species were collected in the rio dos Couros basin, upper rio Tocantins basin, Chapada dos Veadeiros, Goiás State, Brazil. These species possess the characters and general body morphology of the species of the Astyanax scabripinnis species complex. The new combination of Astyanax goyanensis is supported by the absence of characters that define Astyanacinus. Astyanax goyanensis and A. courensis differ from their congeners by meristic and morphometric characters, and color pattern. Astyanax goyanensis has only seven pelvic-fin rays, an uncommon character in the species of this genus, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical fish; Astyanacinus; Astyanax scabripinnis species complex; Chapada dos Veadeiros. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000200004 |
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| Melo,Bruno F.; Vari,Richard P.. |
| A new species of Cyphocharax, Curimatidae, apparently endemic to the blackwater upper rio Negro of the Amazon basin in northern Brazil, is described.The new species is readily distinguished from its congeners by the presence of a distinctly longitudinally elongate, posteriorly vertically expanding patch of dark pigmentation along the midlateral surface of the caudal peduncle, with the patch extending from the base of the middle caudal-fin rays anteriorly past the vertical through the posterior terminus of the adipose fin. The new species additionally differs from all congeners in details of body and fin pigmentation and meristic and morphometric ratios. Evidence for the assignment of the species to Cyphocharax and the occurrence of other species of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Blackwater; Neotropical fish; Pigmentation; Taxonomy. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000200327 |
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| Maxime,Emmanuel L.; Albert,James S.. |
| Herein Gymnotus chaviro is described from the Alto Yuruá (upper rio Juruá) of southeastern Peru, where it is locally abundant in terra firme streams and floodplain oxbow lakes, and occurs sympatrically and syntopically with the type species of the genus G. carapo. The new species is diagnosed by a unique combination of morphometric, meristic, and osteological traits, and a characteristic color pattern in which the dark band-pairs are unbranched and incompletely separated, and the pale inter-bands rarely reach to the dorsal mid-line on the anterior half of the body, being crescent-shaped in abdominal area. Gymnotus chaviro is a member of the G. carapo species group, with which it shares the presence of two pores in the dorsolateral portion of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Biodiversity; Electric fish; Neotropical fish. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400004 |
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| Py-Daniel,Lúcia H. Rapp; Fichberg,Ilana. |
| Rineloricaria daraha, new species, is described from the rio Daraá, tributary of rio Negro, northwestern Amazonas State, Brazil. The new species is diagnosed by having seven branched pectoral-fin rays, finger-like papillae on the lower lip, a large multi-angular preanal plate, and at least four quadrangular plates of variable size surrounding the preanal plate. The new species is known only from rio Daraá and its waterfalls. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Armored catfish; Freshwater fish; Taxonomy; Neotropical fish. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000300007 |
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| Registros recuperados: 40 | |
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