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| Registros recuperados: 42 | |
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| Rebouças, Vanessa Tomaz; Lima, Francisco Roberto dos Santos; Cavalcante, Davi de Holanda; Sá, Marcelo Vinícius do Carmo e. |
| The present work aimed at reassessing the suitable range of water pH for culture of Nile tilapia, Oreochromis niloticus L. juveniles in eutrophic water. Two hundred and forty tilapia juveniles (1.37 ± 0.04 g) were stocked in twenty 250-L polyethylene tanks (12 fish per tank) for eight weeks. In the control tanks, the pH of water was not adjusted at any time, varying freely over the entire study. In the slight acidification treatment, the culture water was acidified daily to reach a water pH between 5.5 and 6.5. In the moderate acidification treatment, there were daily applications of HCl solution to reach a water pH between 4.5 and 5.5. In the alkalinization treatment, tanks received daily applications of Na2CO3 and NaOH to achieve a water pH between 8.5... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquicultura piscicultura pH of water; Tilapia; Aquaculture. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32051 |
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| Bombardelli, Robie Allan; UNOESTE; Hayashi, Carmino; UEM; Meurer, Fábio; PUC - Toledo; Fornari, Darci Carlos; UEM. |
| O objetivo do presente trabalho foi avaliar o efeito do processamento da ração de larvas de Oreochromis niloticus L. utilizada durante o processo de reversão sexual, sobre a sobrevivência, desempenho e proporção sexual. O período experimental foi de 30 dias, o delineamento foi inteiramente casualizado com 3 tratamentos e 6 repetições, considerando uma unidade experimental um aquário de 12L, contendo 20 larvas. No primeiro tratamento, utilizou-se ração farelada por 30 dias; no segundo, ração farelada durante os primeiros 10 dias e micropeletizada durante os 20 dias restantes; no terceiro, ração farelada durante os primeiros 20 dias e micropeletizada durante os 10 dias restantes. Ao final do experimento, os parâmetros de peso, comprimento, sobrevivência e... |
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Palavras-chave: 5.04.00.00-2 Zootecnia processamento de rações; Ração farelada; Ração micropeletizada; Manejo alimentar; Tilapia; Oreochromis niloticus 5.04.00.00-2 Zootecnia. |
| Ano: 2004 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1865 |
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| Santos, Debora Martins Silva; Universidade Estadual do Maranhão; Cruz, Cristiano Ferreira; Universidade Estadual do Maranhão; Pereira, Dayane Pestana; Universidade Estadual do Maranhão; Alves, Lúcia Maria Coelho; Universidade Estadual do Maranhão; Moraes, Flávio Ruas de; Faculdade de Ciências Agrárias e Veterinárias / Universidade Estadual Paulista “Júlio de Mesquita Filho" / Jaboticabal. |
| The present study evaluated the microbiological water quality and tissue lesions in gills from Nile tilapia (Oreochromis niloticus) and hybrid tambacu (Colossoma macropomum female x Piaractus mesopotamicus male). For this, water and gills were collected from fish farming at six locations in Itapecuru-Mirim County, Maranhão State. Microbiological water analyses revealed contamination by total coliforms, Escherichia coli and heterotrophic bacteria. In the gills, we observed a diversity of Gram-positive and Gram-negative bacteria. The tissue lesions were: lamellar fusion, interlamellar hyperplasia, sub-epithelial edema and telangiectasia. Inflammatory lesions were not observed. Significant statistical difference (p > 0.05) was not detected when... |
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Palavras-chave: Ciências Biológicas coliforms; Water; Lesions; Gill epithelium; Tilapia; Tambacu. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8460 |
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| Cruz, Zilma Maria Almeida; Universidade Vila Velha; Castro, Rodrigo Roque Lesqueves de; Universidade Vila Velha; Canal, Adriana; Azevedo Júnior, Romildo Rocha; Universidade Vila Velha; Silva, Ary Gomes da; Universidade Vila Velha; Ramos, Alessandro; Universidade Vila Velha. |
| The effects of polluted water at three sites in the Marinho River, Brazil, on Oreochromis niloticus (Nile tilápia) were investigated using histological, hematological and biochemical approaches. Fish exposed to the impacted water demonstrated that histological changes in gills were accompanied by nuclear and micronuclei abnormalities in cells. The activity of liver and plasma biomarkers (alkaline phosphatase (ALP), acid phosphatase (ACP), alanine aminotransferase (ALT), aspartate aminotransferase (AST) and liver glutathione S-transferase (GST)) showed an expressive change due to the. The results were also correlated with the highest levels of Cu+2, Zn+2 and Mn+2 in the water. The data of this study evidenced the importance of using a set of biomarkers to... |
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Palavras-chave: Aminotransferases; Phosphatases; Glutathione-S-transferase; Histology; Cell abnormality; Tilapia. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/13207 |
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| Medri,Vandir; Medri,Waldir; Caetano Filho,Mauro. |
| This experiment was based on observations of 72 juveniles of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial mean weight of 37.27 ± 4.92g, distributed in 12 cages of 100 l to evaluate the effects of the yeast inclusion as proteins source in the diet. The fishes were distributed in a completely randomized design with four treatments (0; 20; 40; and 60%) of yeast protein in substitution to the protein of traditional sources with three repetitions. Effects of the treatments were not observed (p > 0.05) on the survival and to food conversion. It was observed a quadratic effect on weight gain (Y = 73.39 + 0.173X - 0.0034X²; R²= 0.9986). It was concluded the best level of yeast inclusion as source proteins in the diet for reversed Nile... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Cages; Tilapia. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300024 |
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| Fontaínhas-Fernandes,António; Luzio,Ana; Garcia-Santos,Sofia; Carrola,João; Monteiro,Sandra. |
| Adult Nile tilapia, Oreochromis niloticus, of both sexes were exposed in wastewater from a sewage treatment plant for a period of 4 days. Gill samples were collected after 24, 48, 72 and 96 h and histopathological changes were analyzed by light and scanning electronic microscopy. Gill epithelium of control O. niloticus (freshwater group) was similar to that of other teleosts, while histopathological lesions were observed in exposed fishes. The main histopathological changes were edema, lifting of lamellar and filamentar epithelia and lamellar fusion. Cell proliferation with consequent thickening of the filament epithelium was also found in fishes exposed to the treated sewage water. The severity of the lesions increased with the time of exposure, namely... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gill; Tilapia; Histopathology; Wastewater. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500023 |
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| Ranzani-Paiva,Maria José Tavares; Ishikawa,Carlos Massatoshi; Eiras,Augusta Cocuzza das; Silveira,Vivian Risaffi da. |
| A hundred adult of tilapia, Oreochromis niloticus, were inoculated intraperitoneally with 10(8) c.f.u. of Mycobacterium marinum. Other 100 speciemns were maintained without inoculation. Blood samples of six inoculated animals were collected at 01, 03, 07, 14, 21, 28, 35, 42, 49, 56 and 84 days after inoculation. Initially, six specimens were taken from the non inoculated group ("time zero"). The haematological parameters determined were: haematocrit (Hct), haemoglobin concentration (Hgb), total erythrocytes count (RBC), hematological indexes (MCV, MCH and MCHC), thrombocyte count (Tr), leukocyte count (WBC) and leukocyte differential count. There were no changes in Hct, Hgb, MCH and MCHC. However, the mean values for RBC and MCV decreased. The mean values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycobacterium marinum; Tilapia; Oreochromis niloticus; Hematology. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600014 |
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| Medri,Vandir; Pereira,Geni Varéa; Leonhardt,Júlio Hermann. |
| Studies were conducted to evaluate the effect of 10%, 20% and 30% ration substitutions for distillery yeast on the function Taguchis loss using two hundred and forty 45-day-old fingerlings of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial average weight of 1.25 ± 0.14 g placed in amianthus box.. The average results obtained for the limnological parameters of the water quality control through chemical analysis were considered normal. Taguchis losses for the total production, for the dead and discarded fishes did not show correlation for the different levels of alcohol yeast inclusion, showing that the choice of the yeast level in the ration for these fishes depended on its availability and occasional cost. It was observed that the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quality; Ration; Taguchi; Tilapia; Yeast. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000100011 |
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| MEDRI,V.; PEREIRA,G. V.; LEONHARDT,J. H.. |
| Two hundred and forty 45-day-old fingerlings of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial average weight of 1.25 ± 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these fishes depends on the availability and occasional cost. The yeast provides fish with good resistance to unfavorable environmental conditions, which could be verified since there were no statistical differences among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yeast; Oreochromis niloticus; Ration; Tilapia. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100014 |
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| Corrêa,S.A.; Fernandes,M.O.; Iseki,K.K.; Negrão,J.A.. |
| The objective of the present study was to investigate the influence of the establishment of dominance relationships and social stress on plasma cortisol and metabolite levels in Nile tilapia (Oreochromis niloticus). During the 30-day experiment, the fish weighing 236 ± 29 g were kept in individual aquaria, except for two pairings lasting 6 h each. Blood samples were taken from the animals before and after pairing. Display, approach, attack, rebuff, chase flight, and coloration were carried out on days 16 and 30. Activities and behaviors characteristic of the establishment of dominance relationships were described. It was possible to classify all experimental fish (N = 30) as dominant or subordinate. No differences were detected between dominant (N = 15)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tilapia; Social stress; Social relationships; Agonistic behaviors; Cortisol; Dominance. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001200015 |
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| Drummond,Cristina Delarete; Murgas,Luis David Solis; Vicentini,Bruno. |
| The objective of this research was to evaluate the sex reversal technique using 17α--methyltestosterone (MT) hormone, submitted to temperature modification of fry Nilo tilapia storage, aiming to get the data of sex reversal combined with growth performance and fry survival. The experiment was performed at UFLA Fish Culture Station, using tilapia fry (0,008 ± 0.002 g e 0,9 ± 0.1 cm) obeying a totally randomized experimental delineation in a factorial scheme 4x4, in 4 temperatures (26º, 28º, 30º, 32ºC) and 4 hormonal doses (0, 20, 40, 60mg of MT/kg of ration) during 28 days, with 5 repetitions. As temperature raised, weight gain rate, size and survival increased (p<0.01); however, this temperature raise was not effective in modifying males ratio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tilapia; 17α-methyltestosterone; Temperature. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000300033 |
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| Stevanato,Flávia Braidotti; Almeida,Vanessa Vivian; Matsushita,Makoto; Oliveira,Cláudio Celestino; Souza,Nilson Evelázio; Visentainer,Jesuí Vergilio. |
| The objective of this work was to analyze the fatty acid composition and nutrient potential of flour made from tilapia heads, which are normally discarded during the filleting operation. Significant differences were found between the proximate composition (moisture, ash, protein and total lipids) of the in natura tilapia and the flour, due to the drying process. The predominant fatty acids in the heads (in natura and in the flour) were palmitic acid (1,999 mg.100 g-1 and 7,699 mg.100 g-1, respectively), oleic acid (3,128 mg.100 g-1 and 11,447 mg.100g-1, respectively), and linoleic acid (1,018 mg.100 g-1 and 3,784 mg.100 g-1, respectively). The results lead us to conclude that tilapia head flour offers high levels of protein (38.41%), total lipids (35.46%),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tilapia; Heads; Flour; Fatty acids; Nutrients. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612008000200027 |
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| BARRETO,Pedro Luiz Manique; BEIRÃO,Luiz Henrique. |
| Foram utilizadas carcaças residuais da filetagem industrial de tilápias (Oreochomis sp.) na obtenção de carne de pescado separada mecanicamente (CPSM) para elaboração de surimi. Amidos de diferentes fontes, como milho ceroso, milho ceroso modificado e mandioca, e o polissacarídeo carragena foram usados como ingredientes, e estudados seus efeitos no comportamento do gel de surimi. O surimi elaborado a partir de carcaças residuais da filetagem industrial, apresentou um rendimento final de 25% (peso/peso). A análise instrumental de textura apresentou um efeito fortalecedor, em relação à força de penetração dos amidos no gel de surimi, sendo esse efeito proporcional à viscosidade (r = 0,81, p<0,05) dos amidos, estudados por amilograma Brabender; por... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Surimi; Amido; Carragena; Tilapia. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20611999000200005 |
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| Boari,Cleube Andrade; Pereira,Gisele Inocêncio; Valeriano,Carolina; Silva,Belami Cássia; Morais,Vinicíus Mendes de; Figueiredo,Henrique Cesár Pereira; Piccoli,Roberta Hilsdor. |
| The purpose of research was to investigate the bacterial ecology of tilapia (Oreochromis niloticus) fresh fillets and some factors that can influence its microbial quality. Samples of fish cultivation water (n = 20), tilapia tegument and gut (n = 20) and fresh fillets (n = 20) were collected in an experimental tilapia aquaculture located in the city of Lavras, Minas Gerais, Brazil. Staphylococcus spp., Aeromonas spp., Enterococcus spp. and Enterobacteriaceae were quantified using selective plating. For the enumeration of Pseudomonas spp., the most probable number technique (MPN) was utilized. Bacterial colonies (n = 198) were identified by Gram strain and biochemical tests. Aeromonas spp., Pseudomonas spp., Enterococcus spp. and Enterobacteriaceae were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbiology; Aquaculture; Tilapia; Fillets; Quality. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612008000400015 |
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| Mena Guillermo, José Manuel. |
| El objetivo de este estudio fue determinar zonas con potencial para la industrialización de tilapia basadas en las condiciones económicas, productivas, sociales y ambientales de las áreas productoras localizadas en el estado de Veracruz, así como, analizar técnica y económicamente los sistemas de procesamiento actuales para determinar su rentabilidad. Las zonas con potencial industrializador se determinaron usando la metodología de zonificación ecológica-económica. Para el análisis económico, se usó la metodología de evaluación de proyectos, se calculó el Beneficio/Costo, la Tasa Interna de Retorno y el Valor Actual Neto. Se aplicó un cursograma analítico y un análisis de flujos para estimar el tiempo, distancia y número de recorridos realizados en el... |
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Palavras-chave: Oreochromis; Tilapia; Zonificación; Agroecosistema; Industrialización; Zoning; Agroecosystem; Industrialization; Agoecosistemas Tropicales; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/542 |
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| Registros recuperados: 42 | |
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