Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 36 )

2018 ( 52 )

2017 ( 51 )

2016 ( 58 )

Custom range...

Search Results: 1 - 10 of 25229 matches for " Wilson Rogério;Freitas "
All listed articles are free for downloading (OA Articles)
Page 1 /25229
Display every page Item
Elenice Souza Reis,Aldi Feiden,Wilson Rogério Boscolo,Jakeline Marcela Azambuja de Freitas
Ciência Animal Brasileira , 2012,
Abstract: The aim of this study was to evaluate the zootechnical performance and chemical composition of jundia juveniles Rhandia voulezi fed with mash, pelletized and extruded diets and cultivated in cages. One hundred and fifty fish were distributed in fifteen cages (0.20 m3), arranged in cages (5m3), in the hydroelectric plant of Governador José Richa, in Igua u River (Paraná-Brazil). The fish were fed five times a day, with mash, pelletized and extruded diets, containing 30% of protein and 3250 Kcal/kg of digestible energy/kg. At the end of 60 days, significant differences (p<0.05) were observed on fish performance. The fish that were fed with pelletized diet, presented higher average of final weight (44.08g), final length (16.51cm) and weight gain (36.65g). The different processes did not influence fish survival. The averages of protein and mineral matter of carcass chemical composition did not differ statistically (p<0.05), while the values of humidity and lipideos presented differences among treatments. The highest average of lipideos (8.59%) was observed in peletized diet. The mash diet provided fish with lower lipideo (5.45%) and higher humidity (75.98%) rates. A pelleted diet is most suitable for juvenile catfish R. voulezi cultivation in cages.
Uso de trigo organico na alimenta??o de juvenis de tilápia do Nilo
Lui, Tatiane Andressa;Neu, Dacley Hertes;Boscolo, Wilson Rogério;Bittencourt, Fábio;Freitas, Jakeline Marcela Azambuja de;Feiden, Aldi;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000400015
Abstract: although the organic fish production is a growing practice in the world, in brazil, there are just a few studies about it. this study aimed at evaluating the use of organic wheat, in replacement of organic maize, in the diet of nile tilapia juveniles. a total of 200 juveniles (5.24 ± 0.13 g; 6.91 ± 0.40 cm) were distributed in 20 experimental hapas (0.15 m3 of useful volume), in a concrete water tank with capacity for 25.0 m3 and constant aeration system, in a completely randomized design. five diets containing organic wheat middlings (0.0 g kg-1, 50.0 g kg-1, 100.0 g kg-1, 150.0 g kg-1 and 200,0 g kg-1) were elaborated and feeding took place four times a day (08:00 a.m., 11:00 a.m., 02:00 p.m. and 05:00 p.m.). final weight, total length, survival rate, daily weight gain, fulton's condition factor, visceral fat, hepatosomatic index, viscerosomatic index and the centesimal composition of fish carcass (moisture, protein, lipid and ash contents) were evaluated. the inclusion levels of organic wheat middlings did not affect the variables analyzed. the organic wheat can be added to the diet of nile tilapia juveniles up to the limit of 200.0 g kg-1, without causing any productive problem.
Proteína e energia na dieta de jundiás criados em tanques-rede
Freitas, Jakeline Marcela Azambuja de;Sary, Cesar;Luchesi, Júnior Dasoler;Feiden, Aldi;Boscolo, Wilson Rogério;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011001200002
Abstract: the objective of this study was to evaluate the influence of two levels of digestible energy (3250 and 3500 kcal kg-1) in conjunction with three levels of crude protein (25, 30 and 35%) on the productive performance of catfish (rhamdia voulezi) juveniles. two-hundred and forty catfish juveniles with 95.55±6.70 g average weight and 20.43±1.13 cm total length were randomly assigned into twenty-four 370 l-cages, in a factorial arrangement with six treatments and four reptitions. feeding was performed four times a day, ad libitum. at end of experimental period, the factorial analysis of variance showed significant influence with respect to the different parameters evaluated. the fish fed with diets of 30% crude protein and 3,250 kcal digestible energy kg-1 of diet presented the best results. therefore, diets with at least 30% crude protein and 3,250 kcal digestible energy kg-1 are recommend for catfish juveniles.
Proteína e energia em ra??es para alevinos de piavu?u
Bittencourt, Fábio;Feiden, Aldi;Signor, Arcangelo Augusto;Boscolo, Wilson Rogério;Freitas, Jakeline Marcela Azambuja de;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010001200001
Abstract: the aim of this study was to evaluate the requirement of crude protein (cp) and digestible energy (de) in piavu?u fingerlings (leporinus macrocephalus), for a period of 45 days. it was used 150 fingerlings with average weight of 0.40 ± 0.08g, distributed in 30 aquariums (30l) in a completely randomized design in a 3x 2 two-factorial scheme composed of three levels of crude protein (25, 30 and 35% of crude protein) and two levels of digestible energy (3,250 and 3,500 kcal of de/kg), totaling six diets and five replicates. the rations were given four times a day. weight gain linearly increased while feed conversion decreased, also in a linear fashion, according to crude protein levels. digestible energy only influenced weight gain whose best result was observed on animals fed diets containing 3,500 kcal digestyble energy. feed conversion was not affected by levels of digestible energy. a significant interaction occurred among cp and de levels for body composition in moisture, protein and lipids. levels of 35% of cp and 3,500 kcal of de provide better zootechnical results without affecting chemical composition of carcass of piavu?u fingerlings, so the suggested energy:protein ratio is 10 kcal/g cp.
Desempenho de juvenis de tilápia-do-nilo alimentados com ra??es contendo complexo enzimático
Signor, Arcangelo Augusto;Boscolo, Wilson Rogério;Bittencourt, Fábio;Feiden, Aldi;Gon?alves, Giovani Sampaio;Freitas, Jakeline Marcela Azambuja de;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000500006
Abstract: the aim of this study was to evaluate the inclusion of an enzimatic complex in diets for nile tilapia (oreochromis niloticus) on performance, carcass chemical composition as well as water quality. the experiment was performed in 62 days. it was used two hundred reverted fingerlings (14.57 ± 1.24 g) distributed in a complete randomized design in 20 500 l-tanks with four treatments and five replicates, considering a box with 10 fish as a experimental unit. the fish were fed diets containing 0; 0.033; 0.066 and 0.099% of enzimatic complex. the diets were processed in peletized way and supplied four times a day (8:00 a.m., 11:00 a.m., 2:00 p.m. and 5:00 p.m.) the ph average values, electric conductivity, dissolved oxygen, temperature, total phosphorus, ammonia and water nitrate of the cultivation were not influenced by the inclusion of the enzimatic complexin the diet. the inclusion of enzymatic complex in the diet did not affect weight gain, survival, and specific growing rate; however, it affected diet consumption and food conversion, whose values were greater for fish fed 0.066% of enzimatic complex diet. no differences were observed on dry matter, humidity, crude protein, mineral matter, calcium and phosphorus in the fish carcass, nevertheless, the ether extract decreased linearly as the level of enzymatic complex increased. the utilization of enzimatic complex (amylase, protease, cellulase, lipase, pectinase, xylanase, β-glucanase and phytase) at the level of 0.066% for juvenile nile tilapia (oreochromis niloticus) worsens food conversion but does not influence performance and body composition of the fish.
Produtos agropecuários: para quem exportar?
Mata, Daniel da;Freitas, Rogério Edivaldo;
Revista de Economia e Sociologia Rural , 2008, DOI: 10.1590/S0103-20032008000200001
Abstract: the paper discussed the main factors that explain the brazilian agricultural exports. in order to achieve this goal, the paper applied a gravity model that includes fixed and random effects estimations, besides the ordinary least squares (ols) approach. distance, trade partners' gdp, and geographical localization were the significant variables. moreover, puzzle effects are associated to exchange rate, partners' agricultural exports profile and the partners' agricultural share in gdp. finally, this study highlights the potential change of the relevant variables because of specific characteristics of each commercial brazilian partner.
Hiroshima e Nagazaki: raz es para experimentar a nova arma Hiroshima and Nagasaki: reasons to experiment the new weapon
Ronaldo Rogério de Freitas Mour?o
Scientiae Studia , 2005, DOI: 10.1590/s1678-31662005000400011
A educa o ambiental e o turismo ecológico/The enviromental education and the ecological tourism
Silvia Ferreira Marques Salustiano,,rio Jorge Cardoso Coelho Freitas,José Ramon Lamadrid Marón,Hilda Gomes Dutra Magalh?es,Cyntia Fran?a Cavalcante de Andrade,Estéfano Vizconde Veraszto,,Dirceu da Silva,Nonato Assis de Miranda,Fernanda Oliveira Simon,Rejane Machado,M?nica Aparecida Martinicos de Abreu Berton,Fernando Mattos,Glenilce Maria de Sousa Forte,Sinara Socorro Duarte Rocha,Francisco Paulo do Nascimento,Beatrice Laura Carnielli,Wilson Correia,Rogério Paiva Castro,Luciano Accioly Lemos Moreira,Sidne
ETD : Educa??o Temática Digital , 2007,
Abstract: A atividade turística no Brasil tem alcan ado grande expans o, principalmente o segmento do turismo ecológico. Este artigo foi elaborado a partir das reflex es de Dias, em sua obra Educa o Ambiental; princípios e práticas, e de Ruschman, em Turismo no Brasil; análise e tendências. Através dessas análises bibliográficas, foi possível observar a importancia de se promover a educa o ambiental, tanto no sentido formal quanto informal, e também de se relacionar a produ o do conhecimento com a atividade turística empresarial. Trata-se, portanto, de uma reflex o sobre a valoriza o e utiliza o da ciência e do conhecimento como instrumento de orienta o para se estabelecer as bases do desenvolvimento sustentável, que deve envolver diversas dimens es, tais como a econ mica, a social, a cultural e a ambiental. Tourist activities in Brazil have attained great expansion, mainly in the areas of ecological tourism. This article Written based on Dias Considerations in enviromental Education; principles and practice and Ruschman’s book Tourism in Brazil; analysis and tendency, Though those bibliographic analises it was possible to observe the importance of promoting the enviromental Education either in the formal sense on the informal, and also relating the production of knowledge to the enterprising tourist activity. Thus, it a reflection on the value and use of science and knowledge as on orientation tool to establish the basis of sustainable development which must involve the various dimensions, such as, the economical, social, cultural and enviromental ones. Keywords Turismo ecológico --- Educa o ambiental --- Desenvolvimento sustentável --- Ecological tourism --- Enviromental education --- Sustainable development
Desenvolvimento de larvas de Steindachneridion sp. em diferentes condi??es de refúgio e luminosidade
Feiden, Aldi;Hayashi, Carmino;Boscolo, Wilson Rogério;Reidel, Adilson;
Pesquisa Agropecuária Brasileira , 2006, DOI: 10.1590/S0100-204X2006000100018
Abstract: the influence of luminosity and of the use of refuges on the initial development of steindachneridion sp. garavello (siluriforme: pimelodidae) larvae was evaluated. a thousand larvae 18.02 mm high and 62.2 mg weight were used in an entirely randomized design, with five treatments and four replicates, in 35 l-aquarium during 22 days. the treatments consisted on the following environments: darkness without refuges, clear with artificial refuge, darkness with artificial refuge, clear with natural refuge and clear without refuge. all larvae received the same feeding during the experiment. the best survival rates were found for darkness without refuges, clear with artificial refuge and clear without refuge, with 84, 76 and 70%, respectively. the best development was in darkness and without refuges. the treatment darkness with artificial refuge provided significant differences in relation to the other treatments as far as survival and weight are concerned, showing high heterogeneity for weight. environment without refuges are the most appropriate for the larval development of this specie.
Influência do processamento da ra??o no desempenho e sobrevivência da tilápia do Nilo durante a revers?o sexual
Meurer, Fábio;Hayashi, Carmino;Boscolo, Wilson Rogério;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000200003
Abstract: this work was carried out at aquicultura laboratory of maringá state university, to evaluate the different processing form of diets on nile tilapia fry performance and survive, during sexual revert phase. was utilized 540 fry distributed, on completely randomized design with three treatments and six replications, in eighteen 54 l aquarium and one aquarium with 30 nile tilapia fry was considered an experimental unit. the experimental period was 28 days with average temperatures of 21.9 ± 0.1oc in the morning and 22.7 ± 0.3oc in the afternoon. the diet was formulated (38.6% of digestible protein and 3800 kcal/kg digestible energy) differing only about processing form (crumble [md], meal [nd] and pasty [pd]). no difference was observe to final weight and body condition, but to biomass production, the fry submitted of nd treatment was higher than md and pd treatments, that were equal. to survive nd and pd were equal and higher than md treatment. it was concluded that, with 0.5 mm of mealling degree, the meal diets was most adequate to nile tilapia fry, during sex revert phase.
Page 1 /25229
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.