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| Registros recuperados: 14 | |
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| Vieira,Vania Lucia Pimentel; Baldisserotto,Bernardo. |
| Information about amino acids and carbohydrate absorption in fish is important to formulate an adequate diet to obtain optimal growth. Therefore, the objective of this study was to investigate if Na+-dependent transporters are involved on the absorption of glycine, L-glutamine, L-leucine, L-lysine, L-proline, L-alanine, and the carbohydrates fructose and glucose in the pyloric ceca of Hoplias malabaricus. The pyloric ceca were mounted in a system of continuous perfusion "in vitro". Amino acids and carbohydrates were placed on the mucosal side at concentrations of 10, 20, and 40mM. The serosal side of the pyloric ceca was positive in relation to the mucosal side. The addition of glycine, L-glutamine, L-leucine, L-lysine, L-proline (all tested... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hoplias malabaricus; Amino acids; Carbohydrates; Intestinal absorption; Na+-dependent transporters; Pyloric ceca. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000500009 |
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| Santos, Rosemeire de Souza; Universidade do Oeste Paulista - UNOESTE; Marchiori, Natalia; Universidade Federal de Santa Catarina - UFSC; Santarem, Vamilton Alvares; Universidade do Oeste Paulista - UNOESTE; Takahashi, Haroldo Kazuyuki; Universidade do Oeste Paulista - UNOESTE; Mourino, José Luis Pedreira; Universidade Federal de Santa Catarina - UFSC; Martins, Maurício Laterça; Universidade Federal de Santa Catarina - UFSC. |
| Parasitological indexes of Austrodiplostomum compactum (Digenea, Diplostomidae) in fishes from the Paraná River, Presidente Epitácio region, state of São Paulo, Brazil, and their relationship with climate and water quality are evaluated. Fifty-one specimens of Plagioscion squamosissimus, 39 Geophagus surinamensis, 27 Hoplias malabaricus and 23 Cichla sp. were collected between June 2007 and June 2008. Water quality and rainfall indexes were measured monthly. P. squamosissimus had the highest parasite rate, with 98% total prevalence, intensity of infection varying between 1 and 255 and parasite mean abundance totaling 40.5 ± 9.9. H. malabaricus had the next parasite rate, with 66.6% total prevalence, parasite intensity between 2 and 184 and mean abundance... |
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Palavras-chave: Fish; Plagioscion squamosissimus; Geophagus surinamensis; Hoplias malabaricus; Cichla; Diplostomum; Infection. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9337 |
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| DA ROSA,RENATA; RUBERT,MARCELÉIA; BERTOLLO,LUIZ A C; MARTINS-SANTOS,ISABEL C; GIULIANO-CAETANO,LUCIA. |
| Karyotypes of seventeen Hoplias malabaricus specimens, collected in the fish culture station of UNOPAR (University of Northern Paraná), were analyzed. The station is in the Claro River system in the Tibagi River basin. Two distinct and coexistent karyotype forms (cytotypes) were identified, comprising either 42 chromosomes (cytotype A) or 40 chromosomes (cytotype C), both presenting metacentric and submetacentric chromosomes. In two specimens, one male and one female, it was not possible to characterize a modal diploid number because different cell lines were observed, with a predominance of 2n=41 and 2n=42 chromosomes at a frequency of 38.24% and 41.12%, respectively. The karyotype with 2n=41 showed some putative monosomic and trisomic chromosomes, while... |
| Tipo: Journal article |
Palavras-chave: Hoplias malabaricus; Chromosomal mosaicism; Coexistence of cytotypes; RAPD; Reproductive isolation. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000300003 |
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| Polez,V.L.P.; Moraes,G.; Santos Neto,C.. |
| The exposure of fish to air is normally expected to interfere with the nitrogen excretion process. Hoplias malabaricus and Hoplerythrinus unitaeniatus, two teleost species, display distinct behaviors in response to decreases in natural reservoir water levels, although they may employ similar biochemical strategies. To investigate this point, plasma levels of ammonia, urea, uric acid, and the two urea cycle enzymes, ornithine carbamoyl transferase (OCT) and arginase (ARG), as well as glutamine synthetase (GS) were determined for both species after exposure to air. Plasma ammonia increased gradually during exposure to air, but only H. malabaricus showed increased concentrations of urea. Plasma uric acid remained very low in both fish. Enzymatic activities... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hoplias malabaricus; Hoplerythrinus unitaeniatus; Fish; Urea cycle enzymes; Biochemical adaptation; Air exposure. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000200017 |
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| Tanan,C.L.; Ventura,D.F.; de Souza,J.M.; Grotzner,S.R.; Mela,M.; Gouveia Jr.,A.; Oliveira-Ribeiro,C.A.. |
| Methyl mercury (MeHg) is highly neurotoxic, affecting visual function in addition to other central nervous system functions. The effect of mercury intoxication on the amplitude of horizontal cell responses to light was studied in the retina of the fish Hoplias malabaricus. Intracellular responses were recorded from horizontal cells of fish previously intoxicated with MeHg by intraperitoneal injection (IP group) or by trophic exposure (T group). Only one retina per fish was used. The doses of MeHg chloride administered to the IP group were 0.01, 0.05, 0.1, 1.0, 2.0, and 6.0 mg/kg. The amplitudes of the horizontal cell responses were lower than control in individuals exposed to 0.01 (N = 4 retinas), 0.05 (N = 2 retinas) and 0.1 mg/kg (N = 1 retina), whereas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methyl mercury; Horizontal cells; Electrophysiology; Hoplias malabaricus; Retina. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000700017 |
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| Silva,Márcio J. da; Figueiredo,Bruno R. S.; Ramos,Robson T. C.; Medeiros,Elvio S. F.. |
| Temporary and semi-permanent aquatic habitats in semi-arid Brazil have been reported as important sites supporting a diverse fish fauna. As such, they must be able to trophically sustain fish species that feed at different trophic levels. This study aims to describe the diets of Astyanax aff. bimaculatus, Hoplias malabaricus and Prochilodus brevis in aquatic systems in semi-arid Brazil, providing evidence of the importance of these habitats as supporters of large consumers like fish. The diet of the three species studied was diverse, feeding on a range of food items, from microalgae to fish. Despite that, a few items were more important to each of the study species. These results and the relatively high rates of stomach fullness indicate that a diverse and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax aff. bimaculatus; Hoplias malabaricus; Prochilodus brevis; Intermittent habitats; Caatinga. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400012 |
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| Cestari,Marta Margarete; Lemos,Priscilla Maria M.; Ribeiro,Ciro Alberto de Oliveira; Costa,João Ricardo M. Alves; Pelletier,Emilien; Ferraro,Marcos V.M.; Mantovani,Mário Sérgio; Fenocchio,Alberto Sergio. |
| The effects of clastogenic or mutagenic agents have rarely been studied in neotropical fish species exposed to contaminated water. In this study, the genetic damage caused by lead in the widely distributed South American fish, Hoplias malabaricus, was assessed using the comet (SCGE) assay and by testing for chromosomal aberrations. Eighteen specimens were acclimatized to laboratory conditions and then chronically exposed to contaminated food by feeding prey (Cyprinus sp.) injected intraperitoneally with doses of inorganic lead adjusted to give a contamination level of 21 mg of Pb2+.g-1 net weight of H. malabaricus. Three fish were sampled for chromosomal analysis after four doses (18 days) and another three after eight doses (41 days) of lead and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromosomal aberrations; Comet assay; Genotoxicity; Hoplias malabaricus; Lead; Mutagenesis. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200023 |
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| Martins, Maurício Laterça; UFSC; Santos, Rosimeire de Souza; UNOESTE; Takahashi, Haroldo Kazuyuki; UNOESTE; Marengoni, Nilton Garcia; UNOESTE; Fujimoto, Rodrigo Yudi; UNESP. |
| Estudou-se a infecção por Contracaecum sp. (Nematoda: Anisakidae) em tucunarés (Cichla ocellaris), corvinas (Plagioscion squamosissimus) e traíras (Hoplias malabaricus) provenientes do rio Paraná próximo à cidade de Presidente Epitácio, região ainda não estudada do Estado de São Paulo, Brasil. Os peixes foram capturados mensalmente pelo período de agosto de 2000 a agosto de 2001 para análise parasitológica. O período de outubro/2000 a junho/2001 foi o de maiores temperaturas (26,7oC a 28,8oC) e entre novembro/2000 e maio/2001 de maiores índices de pluviosidade (291,6mm). Observou-se prevalência de até 70% e intensidade média de até 9,5 parasitos em setembro/2000 em H. malabaricus. A prevalência, intensidade média e abundância média de Contracaecum sp. em... |
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Palavras-chave: 5.04.00.00-2 Zootecnia Contracaecu; Cichla ocellaris; Plagioscion squamosissimus; Hoplias malabaricus; Prevalência; Intensidade média 5.04.00.00-2 Zootecnia. |
| Ano: 2003 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2096 |
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| Bonci,D.M.O.; Lima,S.M.A. de; Grötzner,S.R.; Oliveira Ribeiro,C.A.; Hamassaki,D.E.; Ventura,D.F.. |
| To quantify the effects of methylmercury (MeHg) on amacrine and on ON-bipolar cells in the retina, experiments were performed in MeHg-exposed groups of adult trahiras (Hoplias malabaricus) at two dose levels (2 and 6 µg/g, ip). The retinas of test and control groups were processed by mouse anti-parvalbumin and rabbit anti-alphaprotein kinase C (alphaPKC) immunocytochemistry. Morphology and soma location in the inner nuclear layer were used to identify immunoreactive parvalbumin (PV-IR) and alphaPKC (alphaPKC-IR) in wholemount preparations. Cell density, topography and isodensity maps were estimated using confocal images. PV-IR was detected in amacrine cells in the inner nuclear layer and in displaced amacrine cells from the ganglion cell layer, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methylmercury; Retina; Hoplias malabaricus; Amacrine cells; Displaced amacrine cells; ON-bipolar cells. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000300011 |
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| BENIGNO,RAIMUNDO N.M.; KNOFF,MARCELO; MATOS,EDILSON R.; GOMES,DELIR C.; PINTO,ROBERTO M.; CLEMENTE,SÉRGIO C. SÃO. |
| Species of fish of Marajó Island, State of Pará, Brazil, were examined to identify the trematodes parasitizing 102 Hoplerytrinus unitaeniatus (gold wolf fish) and 104 Hoplias malabaricus (thraira). Metacercariae of two species of trematodes, 170 specimens of Clinostomatopsis sorbens and 10 Ithyoclinostomum dimorphum were found and identified. The parasitary indices of C. sorbens from H. unitaeniatus and H. malabaricus, were 43.14% and 30.77% for prevalence, 2.52 and 1.84 for mean intensity, 1.09 and 0.57 for mean abundance and 1 to 9 and 1 to 7 for range of infection, respectively, on both fish the site of infection was the mesentery. The parasitary indices of I. dimorphum from H. unitaeniatus were 2.94% for prevalence, 2.66 for mean intensity, 0.08 for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clinostomidae; Hoplerytrinus unitaeniatus; Hoplias malabaricus; Brazil. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200733 |
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| Pompeu,Paulo dos Santos; Godinho,Alexandre Lima. |
| Two piscivorous fishes, peacock bass (Cichla monoculus Spix & Agassiz, 1831) (Perciformes) and piranha (Pygocentrus nattereri Kner, 1860) (Characiformes), were introduced in some Rio Doce valley lakes (19º50'S, 42º40'W) for sport fisheries enhancement. As a consequence, small individuals and species were practically vanished in the host lakes. In this study, the effects of peacock bass and piranha introductions on the diet of a native piscivorous fish, the trahira - Hoplias malabaricus (Bloch, 1794) are presented. Trahira's diet from three lakes were was compared with the stomach contentsdiet of trahira's living in another between three lakes with and three withoutstocked with the piscivorous species peacock bass and piranha. In the lakes with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cichla; Pygocentrus; Hoplias malabaricus; Diet; Species introduction. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400016 |
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| Dergam,Jorge A.; Paiva,Samuel R.; Schaeffer,Carlos E.; Godinho,Alexandre L.; Vieira,Fabio. |
| In the Rio Doce basin of southeastern Brazil, the freshwater fish Hoplias malabaricus (trahira) is a widespread predatory characin and one of the few resilient native fishes in a highly impacted lake system. In order to test for genetic differentiation in populations within this basin and for biogeographic relationships among populations of this species in other basins, a study was conducted using RAPD-PCR analysis of Rio Doce samples (N = 63) and phylogeographic analyses with mitochondrial DNA (mtDNA) haplotypes, including the Rio Grande and Macacu river basins. In the Rio Doce basin, the patterns of genetic similarity of RAPD-PCR markers (individual fingerprinting and Neis genetic distance) suggest the existence of two genetically different groups, one... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: RAPD; SSCP; MtDNA; Phylogeography; Hoplias malabaricus; Conservation genetics. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400005 |
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| Registros recuperados: 14 | |
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