Consulta: subjectFacets:"Tilapia"
Registros recuperados: 39
Data/hora: 05/06/2024 08:17:10

Factibilidad de la industrialización de tilapia (Oreochromis spp.) en el estado de Veracruz, México: Un enfoque agroecosistémico.
Provedor de dados: 32
Autores: 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...
Palavras-chave: Oreochromis; Tilapia; Zonificación; Agroecosistema; Industrialización; Zoning; Agroecosystem; Industrialization; Agoecosistemas Tropicales; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/542

Factibilidad de la industrialización de tilapia (Oreochromis spp.) en el estado de Veracruz, México: Un enfoque agroecosistémico.
Provedor de dados: 32
Autores: 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...
Palavras-chave: Oreochromis; Tilapia; Zonificación; Agroecosistema; Industrialización; Zoning; Agroecosystem; Industrialization; Agoecosistemas Tropicales; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/542

Application of the comet assay in erythrocytes of Oreochromis niloticus (Pisces): a methodological comparison
Provedor de dados: 74
Autores: Christofoletti,Cintya A.; David,José Augusto O.; Fontanetti,Carmem S.
The present study applied the comet assay to erythrocytes of Oreochromis niloticus with the aim of improving protocols to detect DNA damage in these cells, by using two distinct pHs (pH = 12.1 and pH &gt; 13) and evaluating whether there is a correspondence between silver and ethidium bromide staining. Comets were visually examined and, the frequency of cells with and without damage was obtained, as well as the distribution of classes and scores. By using the Kruskal-Wallis test, our results revealed that pH 12.1 is more effective, although both pHs can be used. Our findings also suggest that silver staining can substitute ethidium bromide, an expensive and highly toxic stain that requires specific equipment for examination.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Comet assay; Ethidium bromide; Silver staining; Tilapia.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100024

Impact of fish cage-culture on the community structure of zooplankton in a tropical reservoir
Provedor de dados: 76
Autores: Dias,Juliana D; Takahashi,Érica M; Santana,Natália F; Bonecker,Cláudia C.
We investigated the impact of fish cage culture on the zooplankton community structure in a tropical reservoir. We hypothesized that community abundance is greater near cages and increases over time due to the increase in food availability. Samplings were performed near, upstream and downstream from net cages, and before and after net cage installation. The abundance of zooplankton increased 15 days after the experiment was set up, followed by a reduction and finally increased. Rotifer abundance showed significant differences among sites (p&lt;0.05) and sampling periods (p&lt;0.001). Significant differences were also observed in total zooplankton and cladoceran abundance (p&lt;0.001). The spatial and temporal variation of the physical and chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Tilapia; Environmental impact.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000100011

Diagnóstico da cadeia de valor da tilapicultura no Brasil.
Provedor de dados: 14
Autores: BARROSO, R. M.; MUÑOZ, A. E. P.; TAHIM, E. F.; WEBBER, D. C.; ALBUQUERQUE FILHO, A. da C.; PEDROZA FILHO, M. X.; TENÓRIO, R. A.; CARMO, F. J. do; BARRETO, L. E. G. de S.; MUEHLMANN, L. D.; SILVA, F. M.; HEIN, G.
Introdução. Metodologia. Diagnóstico dos Polos de Tilapicultura dos Açudes Castanhão e Orós. Aspectos gerais. Aspectos geográficos e climáticos. Características naturais do Polo do Castanhão. Condições naturais do Polo de Orós. Fatos históricos relevantes para o desenvolvimento dos Polos. Caracterização da tilapicultura. Perfil dos produtores. Caracterização tecnológica. Forma de comercialização e agregação de valor da tilápia cearense. Mercado. Infraestrutura do Polo. Financiamento da atividade. Particularidades da produção de cada Polo. Governança e estrutura da cadeia de valor da tilápia. Estrutura da cadeia de suprimentos. Governança da cadeia de valor. Análise competitiva dos Polos do Ceará. Distribuição do valor agregado. Arcabouço legal e...
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Peixe de água doce; Tilapia; Cadeia produtiva; Piscicultura.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1090301

Tilapia production and feeding management in the semi-arid of brazil: a view of some recent developed techniques.
Provedor de dados: 14
Autores: CAMPECHE, D. F. B.; BEZERRA, R. de S.; MELO, J. F. B. de; CORREIA, E. de S.
The Semi-Arid is not one of the first climates that comes to mind when fish production is imagined. First of all, it is important to describe the semi-arid in Brazil since it enclosures 969.589,4 km2, about 11% of the Brazilian territory, and more than 1.000 municipalities in 9 different Brazilian States. In this area live over 22 million people, which is about 10% of the Brazilian total population. However the Brazilian semi-arid has some particular characteristics that made it possible.The São Francisco River and large water reservoirs such as Castanhão and Orós are some of the water bodies where tilapia culture has been sucessfull. There are several production systems adopted ranging from tilapia in irrigation reservoirs on small rural properties to...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Manejo alimentar; Consumo humano.; Tilapia; Peixe; Produção; Aquicultura.; Fish; Aquaculture.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1001169

Transcriptomic response to parasite infection in Nile tilapia (Oreochromis niloticus) depends on rearing density
Provedor de dados: 5
Autores: Ellison, Amy R.; Uren Webster, Tamsyn M.; Rey, Olivier; Garcia De Leaniz, Carlos; Consuegra, Sofia; Orozco-terwengel, Pablo; Cable, Jo.
Background: Captive animal populations, be it for food production or conservation programmes, are often maintained at densities far beyond those in natural environments, which can have profound effects on behaviour, immune and stress levels, and ultimately welfare. How such alterations impact transcriptional responses to pathogen infection is a 'different kettle of fish' and remains poorly understood. Here, we assessed survival and gene expression profiles of infected fish reared at two different densities to elucidate potential functional genomic mechanisms for density-related differences in disease susceptibility. Results: Utilising a whole-transcriptome sequencing (RNAseq) approach, we demonstrate that rearing density in tilapia (Oreochromis niloticus)...
Tipo: Text
Palavras-chave: Stocking density; Stress; Saprolegnia; Aquaculture; Transcriptome; Tilapia; Circadian rhythm; Disease risk.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00462/57353/78952.pdf

Aquaculture activities in Fiji
Provedor de dados: 5
Autores: Vereivalu, T.
Fiji has no aquaculture tradition, but the Government is engaged in aquaculture production since 1969, with the help of other countries and international organization like F.A.O. Some species have been tested: Fishes: Grass carp (Ctenopharyngodon idellus ) and Tilapia ; Molluscs: Oyster (Crassostrea echinata ) and Mussel (Mytilus viridis ); Crustacean: freshwater prawn (Macrobrachium rosenbergii ) and shrimps (Penaeus monodon, P. indicus, P. stylirostris ).
Tipo: Text
Palavras-chave: Tilapia; Ctenopharyngodon idella; Pisces; Mytilus viridis; Mollusca; Penaeus stylirostris; Penaeus indicus; Penaeus monodon; Macrobrachium rosenbergii; Crustacea.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1498.pdf

Energy-protein management by some warmwater finfishes.
Provedor de dados: 5
Autores: Luguet, P; Moreau, Y.
If warmwater finfish protein requirements as level in diet is low, absolute intake per day is similar to those of coldwater species. But relation of this requirement with specific growth rate differs for strictly warmwater fishes as Tilapias. Analysis of partition between protein and non-protein energy retention shows that these species with Clarias make a better use of non-protein energy provided and consequently improve their protein retention. Better carbohydrate digestibility and metabolism are propounded as part of the explanation.
Tipo: Text
Palavras-chave: Clarias; Oreochromis mossambicus; Oreochromis aureus; Oreochromis niloticus; Tilapia; Cichlidae; Pisces; Nutritional requirements; Digestibility; Diets; Proteins; Metabolism; Carbohydrates; Nutrition; Feeding; Growth rate.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1424.pdf

Change of osmoregulatory and hematological parameters in tilapia (Oreochromis niloticus) after exposure to sublethal mercury concentrations
Provedor de dados: 5
Autores: Handayani, Kiki Syaputri; Soegianto, Agoes; Lignot, Jehan-hervé.
The effects of Hg exposure on blood parameters and gill physiology of tilapia (Oreochromis niloticus) were analyzed. Fish maintained in freshwater were exposed for 7 days (d) to sublethal mercury concentrations (0.1 and 1 mg/L). Blood serum osmolality (SO), sodium (Na+), potassium (K+) and chloride (Cl−) ionic concentrations, and hematological parameters were assessed after 1 up to 7 d of exposure. Serum osmolality and ionic concentrations of exposed fish appeared differently affected throughout the experimental period compared to the controls. Osmolality was reduced at the 2 tested concentrations but Na+ and Cl− contents were only altered at 1 mg/L of Hg after 1 d of exposure and values rapidly returned to the control values thereafter. K+ content was...
Tipo: Text
Palavras-chave: Mercury; Tilapia; Osmoregulation; Serum ions; Blood; Aquatic toxicology.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00648/76033/76943.pdf

Quantifying the genetic parameters of feed efficiency in juvenile Nile tilapia Oreochromis niloticus
Provedor de dados: 5
Autores: De Verdal, Hugues; Vandeputte, Marc; Mekkawy, Wagdy; Chatain, Beatrice; Benzie, John A. H.
Background: Improving feed efficiency in fish is crucial at the economic, social and environmental levels with respect to developing a more sustainable aquaculture. The important contribution of genetic improvement to achieve this goal has been hampered by the lack of accurate basic information on the genetic parameters of feed efficiency in fish. We used video assessment of feed intake on individual fish reared in groups to estimate the genetic parameters of six growth traits, feed intake, feed conversion ratio (FCR) and residual feed intake in 40 pedigreed families of the GIFT strain of Nile tilapia, Oreochromis niloticus. Feed intake and growth were measured on juvenile fish (22.4g mean body weight) during 13 consecutive meals, representing 7days of...
Tipo: Text
Palavras-chave: Feed conversion ratio; Tilapia; Heritability; Genetic estimations; Correlations.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00469/58115/60551.pdf

An integrated fish-plankton aquaculture system in brackish water
Provedor de dados: 5
Autores: Gilles, S.; Fargier, L.; Lazzaro, X.; Baras, E.; De Wilde, Nicolas; Drakides, C.; Amiel, C.; Rispal, B.; Blancheton, Jean-paul.
Integrated Multi-Trophic Aquaculture takes advantage of the mutualism between some detritivorous fish and phytoplankton. The fish recycle nutrients by consuming live (and dead) algae and provide the inorganic carbon to fuel the growth of live algae. In the meanwhile, algae purify the water and generate the oxygen required by fishes. Such mechanism stabilizes the functioning of an artificially recycling ecosystem, as exemplified by combining the euryhaline tilapia Sarotherodon melanotheron heudelotii and the unicellular alga Chlorella sp. Feed addition in this ecosystem results in faster fish growth but also in an increase in phytoplankton biomass, which must be limited. In the prototype described here, the algal population control is exerted by herbivorous...
Tipo: Text
Palavras-chave: IMTA; Tilapia; Chlorella; Brachionus plicatilis; Photosynthetic recycling aquaculture system.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00118/22955/20945.pdf

Analysis of the black-chinned tilapia Sarotherodon melanotheron heudelotii reproducing under a wide range of salinities: from RNA-seq to candidate genes
Provedor de dados: 5
Autores: Avarre, Jean-christophe; Dugue, R.; Alonso, Pascal; Diombokho, A.; Joffrois, C.; Faivre, N.; Cochet, C.; Durand, Jean Dominique.
The black-chinned tilapia Sarotherodon melanotheron heudelotii is an ecologically appealing model as it shows exceptional adaptive capacities, especially with regard to salinity. In spite of this, this species is devoid of genomic resources, which impedes the understanding of such remarkable features. De novo assembly of transcript sequences produced by next-generation sequencing technologies offers a rapid approach to obtain expressed gene sequences for non-model organisms. It also facilitates the development of quantitative real-time PCR (qPCR) assays for analysing gene expression under different environmental conditions. Nevertheless, obtaining accurate and reliable qPCR results from such data requires a number of validations prior to interpretation....
Tipo: Text
Palavras-chave: Gene expression; Non-model organism; Reference gene; Salinity; Spermatogenesis; Tilapia.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28255/26625.pdf

Growing, losing or introducing? Cage aquaculture as a vector for the introduction of non-native fish in Furnas Reservoir, Minas Gerais, Brazil
Provedor de dados: 83
Autores: Azevedo-Santos,Valter Monteiro de; Rigolin-Sá,Odila; Pelicice,Fernando Mayer.
Cage aquaculture has been developed in many countries, including Brazil. This form of production, although economically productive, may cause several impacts to the environment. Considering the historical relationship between aquaculture and species introduction, our study investigated the potential of cage aquaculture in spreading non-native species into hydroelectric reservoirs. We interviewed 19 fish farmers in Furnas Reservoir, Grande River basin. All producers have grown exclusively Nile tilapia (Oreochromis niloticus), an African fish, and all producers reported the occurrence of fish escapes. Releases were mainly accidental, but highly frequent during some management procedures, such as length classification, fish capture and juvenile stocking....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Escapes; Introduced fish; Management; Neotropic; Oreochromis niloticus; Tilapia.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400024

Etude de la reproduction du tilapia du nil "Oreochromis  niloticus" (l.) en captivité dans les eaux géothermales du sud Tunisien.
Provedor de dados: 20
Autores: Dhraief, M.N.; Azaza, M.S.; Kraiem, M.M.
La présente étude a pour objectif la détermination de la taille de première maturité sexuelle, l’estimation de la fécondité ainsi que la taille correspondant à un meilleur rendement de production de larves chez le Tilapia du Nil Oreochromis niloticus (L.) maintenu en captivité dans les eaux géothermales du sud tunisien. Les résultats ont montré que le Tilapia arrive à la première maturité sexuelle dès la première année d’élevage, à une longueur (Lm50) relativement petite évaluée à 11,3 cm et 12,3cm, respectivement pour les femelles et pour les mâles. La femelle d’O. niloticus présente une fécondité absolue (F) relativement faible (variable entre 241 et 1358 œufs respectivement pour des femelles de 15,5 et de 24,1 cm) et liée à la taille des femelles par la...
Tipo: Journal Contribution
Palavras-chave: Tilapia culture; Fecundity; Tilapia.
Ano: 2010
URL: http://hdl.handle.net/1834/4731

Essai d’acclimatation du tilapia du nil "Oreochromis niloticus"  dans la retenue du barrage Lebna (Cap bon, Tunisie)
Provedor de dados: 20
Autores: Derouiche, E.; Azaza, M.S.; Kraiem, M.M.
Ce travail consiste à tester l’acclimatation d’une espèce thermophile, le tilapia du Nil Oreochromis niloticus dans la retenue du barrage Lebna (Cap Bon), moyennant un système extensif de grossissement. Les résultats montrent que le tilapia introduit directement en pleine retenue a pu se maintenir et supporter les mauvaises conditions hivernales en adoptant une stratégie d’hibernation. Par ailleurs, avec le retour des conditions favorables (T&gt;20°C), ce Cichlidé a montré une bonne condition, une meilleure croissance qu’en élevage dans les bassins et cette fraction de population a pu proliférer.
Tipo: Journal Contribution
Palavras-chave: Acclimatization; Brackishwater fish; Environmental conditions; Fish culture; Growth; Hibernation; Population dynamics; Rearing; Water reservoirs; Testing; Tilapia.
Ano: 2009
URL: http://hdl.handle.net/1834/4494

U.S. Import Demand for Tilapia from Selected FTAA Countries
Provedor de dados: 31
Autores: Ligeon,   Carel; Bayard,   Budry; Clark,   Joy M.; Jolly,   Curtis M.
Seafood consumption in the U.S. has increased over the period 1990 to 2003.  A large percentage of the seafood consumed in the U.S. is imported. The most important seafood products imported to the U.S. are shrimp, Atlantic salmon, tilapia, catfish, crayfish, mussels and a mixture of mollusks.  In 2003, the U.S. imported 199 million pounds of tilapia and tilapia products, at a value of $241.2 million, a 38% increase from the previous year.  The seafood market has been considered an important foreign exchange earner for the Caribbean Common Market (CARICOM), and Free Trade Area of the Americas (FTAA) member countries. Jamaica is the only CARICOM country that exports tilapia products from aquaculture sources to the U.S.  In 2003, Jamaica exported 39,950...
Tipo: Journal Article
Palavras-chave: Tilapia; Sea-food; Almost-Ideal-Demand-System; Import; FTAA countries; Agribusiness; Agricultural and Food Policy; Food Security and Poverty; International Relations/Trade; Research Methods/ Statistical Methods.
Ano: 2007
URL: http://purl.umn.edu/36805

MARKETS FOR NORTHERN PLAINS AQUACULTURE--CASE STUDY OF TILAPIA
Provedor de dados: 31
Autores: Golz,   Theresa K.; Nelson,   William C.
The purpose of this study is to identify and investigate alternative fresh and frozen fillet markets for tilapia within the region.  The competition for this market is primarily an imported product from Asia and Central America.  Total imports plus domestic production has increased from 16.95 million pounds in 1992 to 70.74 million pounds in 1997. Thirty-seven of the 79 respondents handled tilapia in their business.  Thirty of these businesses handled and preferred fresh fillets while ten handled frozen tilapia.  The tilapia businesses were clear in their preferences: 5 to 7 ounce fillets, quick delivery response time, constant supply, taste and size, and suppliers oriented toward customer service.  Twenty-six of the 37 respondents were open to new...
Tipo: Working or Discussion Paper
Palavras-chave: Tilapia; North American Fish Farmers Cooperative; North Central Region; Sensory evaluation; Production; Prices; Size; Imports; Marketing; Production Economics.
Ano: 1999
URL: http://purl.umn.edu/23454

Bioeconomic Evaluation of Substitution of Balanced Feed with Chaya (Cnidoscolus Chayamansa) Leaves in Tilapia Production
Provedor de dados: 31
Autores: Poot-Lope,   Gaspar Roman; Gasca-Leyva,   Eucario.
In Mexico, the culture of tilapia has developed in rural areas, where the main problem is low producer income.  The state of Yucatan also experiences this situation, and scarcity of money needed to purchase inputs results in complementary feeding with chaya (Cnidoscolus chayamansa), whose leaves are edible for humans and animals.  In this situation, CINVESTAV conducted experiments to determine the optimal level of substitution of balanced feed with ray chaya leaves.  The test with 25% and 50% reduced balanced feed complemented with chaya (ad libitum) did not show significant differences (P&gt;0.05) in growth compared to fishes fed with a complete ration of balanced feed (100% feed table).  A bioeconomic model was developed, including a submodel of growth...
Tipo: Conference Paper or Presentation
Palavras-chave: Bioeconomic model; Cost minimization; Tilapia; Livestock Production/Industries; O13; Q22.
Ano: 2005
URL: http://purl.umn.edu/55999

Cultivo de tilápia no Brasil: origens e cenário atual
Provedor de dados: 31
Autores: Figueiredo,   Carlos Alberto Junior; Valente,   Airton Saboya Junior.
O objetivo principal do estudo foi analisar a evolução do cultivo de tilápia no Brasil desde a sua origem até o presente momento, destacando os fatores limitantes e também os fatores favoráveis que contribuíram para a rápida expansão da atividade nos últimos anos. Os dados utilizados na pesquisa foram de origem primária e secundária. Os resultados mostraram que houve intenso crescimento da produção do peixe a partir de 1996, mas ainda não foram feitos os investimentos necessários para viabilizar o beneficiamento e a comercialização da tilápia em larga escala.------------------------The main objective of the study was to analyze tilapia cultivation performance in Brazil since its origins until the present moment. The study emphasizes the limiting factors...
Tipo: Conference Paper or Presentation
Palavras-chave: Tilápia; Aqüicultura; Cadeia produtiva; Tilapia; Aquiculture; Productive chain; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/108143

Yield of lettuce grown in hydroponic and aquaponic systems using different substrates
Provedor de dados: 91
Autores: Jordan,Rodrigo A.; Ribeiro,Evaldo F.; Oliveira,Fabricio C. de; Geisenhoff,Luciano O.; Martins,Elton A. S.
ABSTRACT This study had as objective to evaluate the effect of the substrate on the yield of lettuce grown in aquaponic and hydroponic systems. The study was conducted at the Federal University of Grande Dourados, located in Dourados, MS. A randomized complete block design was used, with three treatments and 16 replicates. The cultivation systems were analyzed independently. The substrates analyzed were: coconut shell fiber, phenolic foam and expanded vermiculite. The plants were grown in two systems (aquaponic and hydroponic), using the NFT (Nutrient Film Technique) system. The crop used was lettuce cv. ‘Alcione’. The parameters analyzed were: crop yield and percentage of roots per plant. In addition, macronutrient contents were analyzed in the leaves....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Soilless cultivation; Coconut shell fiber; Tilapia.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800525

Riesgos de la introducción de tilapias (Oreochromis sp.) (Perciformes: Cichlidae) en ecosistemas acuáticos de Chile
Provedor de dados: 97
Se hace un llamado de alerta ante la posible introducción de la tilapia roja (Oreochromis sp.) a Chile, con fines de cultivo. Se analizan los llamados cultivos monosexuales (solo machos), señalados como la solución para impedir la reproducción no deseada, que evitaría riesgos para la biodiversidad y se demuestra la falsedad de este argumento. Énfasis especial se da a los cultivos de tilapia en áreas marinas. Los peligros para la biodiversidad, son resaltados
Tipo: Journal article
Palavras-chave: Tilapias; Cultivos monosexuales; Biodiversidad; Tilapia; Monosex cultures; Biodiversity.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100015

Effect of vitamin C levels on growth performance, feed conversion rates, survival rates, and histopathology of gill, liver, and kidney of nile tilapia, Oreochromis niloticus
Provedor de dados: 106
Autores: Wutiporn  Phromkunthong.
Tipo: Research
Palavras-chave: Tilapia; Fishes  Feeding and feeds; Fishes  Physiology.
Ano: 1993
URL: http://kb.psu.ac.th/psukb/handle/2553/3656

Determinación del tiempo del vaciado del estómago de la tilapia Oreochromis sp. mediante la utilización de diferentes frecuencias de alimentación semanal y ayuno
Provedor de dados: 109
Autores: Gómez-Peñaranda,José Ader; Clavijo-Restrepo,Laura Cristina.
En el estudio se midió el tiempo necesario para el vaciado total del estómago de tilapias (Oreochromis sp.) en el día de comienzo regular de alimentación posterior a un periodo de ayuno. Se recolectaron muestras de contenido estomacal en periodos de 2 horas después del suministro de alimento (9:30 y 15:30 h) hasta el primer indicio de vaciado. Se utilizaron tilapias con un promedio de peso vivo de 150 ± 10 g dispuestas en cuatro tratamientos: (1) T5 = alimentación a saciedad durante 5 días y ayuno de 2 días (T5), (2) T6 = alimentación a saciedad durante 6 días y ayuno de 1 día, (3) T7 = alimentación a saciedad durante 7 días, y (4) TC = alimentación restringida mediante tabla recomendada por el fabricante, 7 días a la semana. El análisis de datos se...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ayuno; Evacuación; Ingesta; Ración; Saciedad; Tilapia.
Ano: 2012
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122012000300005

Reassessment of the suitable range of water pH for culture of Nile tilapia Oreochromis niloticus L. in eutrophic water
Provedor de dados: 2
Autores: 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

Alternative liming blends for fish culture
Provedor de dados: 2
Autores: Nobre, Mikaely Karine Barbosa; Universidade Federal do Ceará; Lima, Francisco Roberto dos Santos; Universidade Federal do Ceará; Magalhães, Frederico Batista; Universidade Federal do Ceará; Sá, Marcelo Vinícius do Carmo e; Universidade Federal do Ceará.
Calcium carbonate (limestone) is a safe but slow-acting product for aquaculture liming. Calcium oxide (lime) is a fast-acting but dangerous product. It would be interesting to have simultaneously a safe and fast-acting liming product. The present work aimed to evaluate two alternative liming blends for tilapia culture. The culture water was initially acidified with HCl. Next, the same quantity of CaCO3 (control), Na2CO3+CaSO4 or Na2CO3+CaCl2 was applied to the culture water. There were also non-limed tanks. One hundred and twenty Nile tilapia juveniles (1.6 ± 0.1 g) were stocked in twenty 250-L culture tanks for 10 weeks. All products used were similarly efficient in increasing the alkalinity of water. The probable better environment for algal growth in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Limestone; Lime; Tilapia; Alkalinity; Aquaculture.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21282

Interaction between feeding rate and area for periphyton in culture of Nile tilapia juveniles - doi: 10.4025/actascianimsci.v34i2.12469
Provedor de dados: 2
Autores: Rebouças, Vanessa Tomaz; Universidade Federal do Ceará; Caldini, Nayara Nunes; Universidade Federal do Ceará; Cavalcante, Davi de Holanda; Universidade Federal do Ceará; Silva, Francisco Jackes Rodrigues da; Universidade Federal  do Ceará; Sá, Marcelo Vinícius do Carmo e; Universidade Federal  do Ceará.
The objective of the present work was to determine the effects of the interaction between feeding rate and area for periphyton in rearing aquaria for Nile tilapia. Twenty 25 L polyethylene outdoor aquaria were used to hold experimental fish. Three tilapia fingerlings (2.56 ± 0.14 g) were stocked in each aquarium for five weeks (12 fish m-2). There were two different feeding rates (full and full minus 30%) and two submerged areas for periphyton development (59.4% and 96.5% of the aquarium surface area; n = 5). Final body weight, specific growth rate and yield in the 96.5%-area aquaria of fish submitted to 30% less feed were significantly higher than in the 96.5%-area aquaria submitted to full feeding rates. Fish growth in the restricted-feed aquaria was...
Palavras-chave: Tilapia; Fish culture; Semi-intensive system; Productivity; Water quality.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12469

Avaliação de rações fareladas e micropeletizadas para larvas de tilápia do Nilo (Oreochromis niloticus) - desempenho e efetividade da reversão sexual - DOI: 10.4025/actascianimsci.v26i2.1865
Provedor de dados: 2
Autores: 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...
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

Microbiological water quality and gill histopathology of fish from fish farming in Itapecuru-Mirim County, Maranhão State - doi: 10.4025/actascibiolsci.v34i2.8460
Provedor de dados: 3
Autores: 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 &amp;gt; 0.05) was not detected when...
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

Biochemical and cellularchanges in Oreochromis niloticus related to the water pollution of a degraded river - doi: 10.4025/actascibiolsci.v35i3.13207
Provedor de dados: 3
Autores: 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...
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

Effects of an experimental challenge with Mycobacterium marinum on the blood parameters of Nile tilapia, Oreochromis niloticus (Linnaeus, 1757)
Provedor de dados: 52
Autores: 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

Growth of Nile tilapia Oreochromis niloticus fed diets with different levels of proteins of yeast
Provedor de dados: 52
Autores: 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 &gt; 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

Gill histopathological alterations in Nile tilapia, Oreochromis niloticus exposed to treated sewage Water
Provedor de dados: 52
Autores: 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

Application of the taguchi’s loss function in the breeding of nile tilapia fed with different levels of alcohol yeast
Provedor de dados: 52
Autores: 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 Taguchi’s 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. Taguchi’s 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

Growth of Nile tilapia Oreochromis niloticus fed with different levels of alcohol yeast
Provedor de dados: 57
Autores: 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

Effect of the establishment of dominance relationships on cortisol and other metabolic parameters in Nile tilapia (Oreochromis niloticus)
Provedor de dados: 56
Autores: 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

Streptococcus iniae outbreaks in Brazilian Nile tilapia (Oreochromis niloticus L: ) farms
Provedor de dados: 58
Autores: Figueiredo,H. C. P.; Nobrega Netto,L.; Leal,C. A. G.; Pereira,Ulisses P.; Mian,Glaúcia F.
This is the first report of outbreaks of Streptococcus iniae in Nile tilapia farms in South America. Seven isolates were identified by biochemical, serological and molecular tests. Their 16S rRNA gene sequences showed 100% similarity with S. iniae ATCC 29178 and two distinct PFGE patterns were observed for Brazilian isolates.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Infection; MIC; PFGE; Phylogenetic analysis; Tilapia.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200019

Lab-scale periphyton-based system for fish culture
Provedor de dados: 65
Autores: Cavalcante,Davi de Holanda; Silva,Suzete Roberta da; Pinheiro,Paloma Damasceno; Martins,Ádila da Cunha; Sá,Marcelo Vinícius do Carmo e.
The present research aimed to assess a lab-scale model to study periphyton-based systems for fish culture. Twenty-five liters plastic aquaria were stocked with three Nile tilapia, Oreochromis niloticus, juveniles (0.77±0.09g; 12 fish m-2) for 6 weeks in a 2x2 factorial design. Small plastic bottles were placed in some aquaria for periphyton development. Two feeding regimes were employed: "full-fed" (standard feeding rates were fully adopted) and "half-fed" (50% of standard feeding rates). Growth performance and limnological variables were observed in each aquarium. There werefive replicates per treatment. Fish have fed actively on periphyton, especially in the half-fed aquaria. The placement of periphyton bottles had no significant effects on the water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Periphyton; Tilapia; Feeding restriction; Fish culture.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001200022

Growth and survival of tilapia Oreochromis niloticus (Linnaeus, 1758) submitted to different temperatures during the process of sex reversal
Provedor de dados: 64
Autores: 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&lt;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