J.B. Fonseca

Universidade Estadual do Norte Fluminense, Rio de Janeiro, Rio de Janeiro, Brazil

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Publications (47)11.6 Total impact

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    ABSTRACT: Avaliou-se o efeito do balanço eletrolítico (BE) em rações com diferentes níveis de eletrólitos para suínos na fase de crescimento criados em alta temperatura. Foram utilizados 200 suínos machos castrados, com peso inicial de 25,3±1,3 kg e final de 68,8±3,4 kg, distribuídos em delineamento experimental inteiramente casualizado com cinco tratamentos e quatro repetições com dez animais por unidade experimental, para a fase de crescimento T1(testemunha) ração sem suplementação de eletrólitos 191 mEq/kg; T2 (NaHCO3) ração suplementada bicarbonato de sódio (NaHCO3) 250 mEq/kg; T3 (NaHCO3+KCl) ração suplementada NaHCO3 e cloreto de potássio (KCl) 250 mEq/kg; T4 (NaHCO3) ração suplementada NaHCO3 300 mEq/kg; e T5 (NaHCO3+KCl) ração suplementada com NaHCO3 e KCl 300 mEq/kg. As variáveis avaliadas foram consumo de ração, ganho de peso, consumo de nitrogênio, consumo de lisina, eficiência de utilização de nitrogênio para ganho, eficiência de utilização de lisina para ganho, conversão alimentar e os parâmetros fisiológicos, frequência respiratória e temperatura retal. Foi coletado sangue para mensurar as concentrações sorológicas de Na, Cl e K. A temperatura média foi 29,65±3,80º C com UR do ar 69,6±10,4%, Temperatura do Globo Negro de 31,95±1,98º C e Índice de Temperatura do Globo Úmido em 80,51±2,44. Os níveis de BE reduziram (P<0,05) consumo de ração e melhoram o consumo de nitrogênio. Os demais parâmetros de desempenho avaliados não foram afetados pelos diferentes balanços eletrolíticos (P>0,05). A correção do BE não influenciou o desempenho dos suínos.
    Full-text · Article · Feb 2011 · Ciência e Agrotecnologia
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    ABSTRACT: The aim of this study was to evaluate performance and egg quality of Japanese quails (Coturnix japonica) fed rations with low-tannin sorghum replacing corn. Two hundred and ten 65-d female Japanese quails were distributed in a complete random design with five experimental rations (0, 25, 50, 75 and 100% replacement of corn by sorghum) and six replicates with seven birds. There was no significant effect of sorghum levels in the diets on any of the production characteristics in this experiment, which lasted for 112 days. As the levels of sorghum in the ration increased, yolk color and ration cost were reduced. Low-tannin sorghum can completely replace corn in rations for laying Japanese quails.
    Full-text · Article · Dec 2010 · Revista Brasileira de Zootecnia
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    ABSTRACT: The values of the apparent metabolizable energy (AME), the apparent metabolizable energy corrected for nitrogen retention (AME n), and the apparent metabolization coefficient of crude energy (AMCCE) were determined in corn, sorghum, soybean meal, corn gluten meal, and refined soybean oil. Two-hundred and forty six-day-old female Japanese quails (Coturnix japonica) were used in a completely randomized design, with five replicates and eight quails per experimental unit. The treatments consisted of six experimental diets and one reference diet. Each experimental diet was constituted, as fed basis, for 70% of the reference ration and 30% of food that would be tested, except the ration that contained refined soybean oil that was tested, as fed basis, with 10% of addition and 90% of the reference ration. The biological assay was carried out in wired floor cages distributed in iron batteries. The respective values of AME, AMEn (kcal/kg of natural matter basis), and AMCCE (%) of ground corn, sorghum, soybean meal, corn gluten meal, and refined soybean oil were respectively: 3,572, 3,612kcal/kg, and 92.6%; 3,108, 3,149kcal/kg, and 80.9%; 2,633, 2,676kcal/kg, and 65.3%; 4,043, 4,096kcal/kg, and 75.0%; and 9,335, 9,379kcal/kg, and 98.8%. The values of AME described for other birds species were different from those obtained in this study and are not recommended to be used in ration composition for Japanese quails.
    Preview · Article · Feb 2010 · Arquivo Brasileiro de Medicina Veterinária e Zootecnia
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    Preview · Article · Feb 2010 · Arquivo Brasileiro de Medicina Veterinária e Zootecnia
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    Full-text · Article · Dec 2009 · Ciência e Agrotecnologia
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    ABSTRACT: Synthetic pigments from external sources are supplemented in sorghum replacement diets in the substitution for the corn diet of Japanese quails, in order to compensate the decrease in egg yolk color. The purpose of this research was to evaluate the effect of the following synthetic pigments: yellow (apo-ester), red (canthaxanthin), and selenomethionine on sensorial characteristics of eggs laid by Japanese quails fed ration formulated with sorghum, totally substituting a corn diet. The following treatments were used: T1-control diet; T2-sorghum diet (SD); T3-SD + apo-ester; T4-SD + apo-ester + canthaxanthin; T5-SD + apo-ester + canthaxanthin + selenomethionine. Thirty non-trained individuals evaluated egg flavor and yolk color. Average differences were accessed by a paired comparison test at the 5% significance level. Significant differences between the standard sample and treatment samples were observed for flavor and color characteristics of the egg, using a minimum number of coincident answers at the 5% significance level. The degree of flavor difference ranged from low intensity between the standard sample and treatment samples T2, T4, and T5. The degree of color difference ranged from moderate to high intensity between the standard sample and treatment samples. Synthetic pigments (apo-ester and canthaxanthin) associated with selenomethionine in sorghum based diets can be used for Japanese quails.
    No preview · Article · Nov 2009 · Ciência e Agrotecnologia
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    ABSTRACT: Desempenho, Pró-nutrientes, Vilosidades intestinais.
    Preview · Article · Jan 2009

  • No preview · Article · Jan 2009 · Acta Scientiarum Animal Sciences
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    ABSTRACT: Total lysine requirement of laying Japanese quails was estimated in an experiment using 400 female quails involving a randomized block experimental design with five treatments 0.6, 0.8, 1.0, 1.2 e 1.4% total lysine and four replications with 20 birds each. The experiment was conducted for 84 days, with three periods, 28 days each. The animal performance parameters studied were: mean body weight, egg production, feed intake, egg weight, egg mass, feed conversion per egg mass, feed conversion per dozen eggs, mortality and uniformity. Interaction between lysine levels and observation period for feed intake and egg production was detected. It was observed linear effect on feed intake. Egg production was adjusted to the linear response plateau model (LRP), showihg a lower egg production in the third observation period. The total lysine requirement of laying Japanese quails was 0.75% equivalent to 180 mg/bird/day intake for higher egg production.
    No preview · Article · Dec 2008 · Archivos de Zootecnia
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    ABSTRACT: The objective of this study was to evaluate the monoammonium phosphate (MAP) as a source of phosphorus and Paraíso limestone (CP) with higher magnesium levels (1.92%) as a source of calcium for commercial layers. A total of 280 white Dekalb chickens were housed in individual cages during the period from 46 to 58 weeks old. A completely randomized experimental design, with four diets, seven replicates and ten birds per experimental unit were used. The diets were: FBC/CB - dicalcium phosphate and Barroso limestone (gray); FBC/CP - dicalcium phosphate and Paraíso limestone (white); MAP/CB - monoammonium phosphate and Barroso limestone; MAP/CP - monoammonium phosphate and Paraíso limestone. Egg production, mean weight and egg mass; feed intake and feed conversion were evaluate, and also shell percentage and thickness. Egg production, mean egg weight and mass improved with the use MAP with both evaluated limestone. Feed intake and feed conversion improved with utilization of MAP as source of phosphorus. Egg shell percentage and thickness were not affected by calcium source in the diet, hence, the higher level of Mg and finer particles of Paraíso limestone did not impaired egg shell quality. No alterations were observed in feces consistency and survival rate of the layers. The nitrogen excretion was 10% higher for birds that received MAP as a phosphorus source. Monoammonium phosphate could be used as an alternative source of phosphorus replacing dicalcium phosphate; and Paraíso limestone is technically viable for feeding commercial layers without problems for egg production and shell quality.
    Preview · Article · Aug 2008
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    Full-text · Article · Jun 2008
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    ABSTRACT: Four hundred male Cobb chicks were used in an experiment to study the effects of different dietary levels of garlic and copper on the performance, carcass characteristics and serum and tissue cholesterol levels of broiler chicks. The experimental period was comprised between the first 21 days of age of the birds. A completely randomized design was used in a factorial 3 x 3 with the following levels: garlic (0, 1.5, and 3.0%) and copper (0, 125, and 250 mg/kg of ration), in the form of copper sulfate. Two slaughters were realized, the first at 21 days, and the second at 42 days of age of the chicks. Samples of blood and tissues were collected to the determination of fatty acids and cholesterol. The results showed that the supplementation of garlic and copper in the diets may be done without great effects on the performance of the birds and it can result in reduction on serum and cholesterol tecidual of the broilers.
    No preview · Article · Jun 2008 · Revista Brasileira de Zootecnia
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    ABSTRACT: Este trabalho foi realizado com o objetivo de determinar os valores nutricionais de milhos de quatro qualidades, obtidos por meio de estratificação em mesa densimétrica, para frangos de corte em diferentes idades. Os milhos foram designados como: MDA - milho de densidade alta; MDI - milho de densidade intermediária; MDB - milho de densidade baixa; e MDT - milho de densidade total, composto de 30% de MDA, 60% de MDI e 10% de MDB. Dois ensaios biológicos foram conduzidos utilizando-se o método tradicional de coleta total de excretas para determinação da energia metabolizável aparente corrigida (EMAn). O primeiro ensaio metabólico foi conduzido com pintos Cobb de 11 a 19 dias e o segundo, com pintos de 29 a 37 dias de idade. Foram realizadas análises químicas para determinação do perfil nutricional, classificação de grãos segundo a densidade e comparação por meio das estimativas de equações de predição do valor energético e de micotoxinas. Os perfis de aminoácidos digestíveis dos milhos foram estimados pelo NIR. Os valores da EMAn dos milhos de diferentes qualidades (MDA, MDI, MDB e MDT) determinados com frangos na fase inicial foram: 3.308; 3.121; 2.937 e 3.239 kcal/kg e, para a fase de crescimento: 3.413, 3.362, 3.174 e 3.348 kcal/kg, respectivamente. Esses valores comprovam as significativas perdas energéticas dos milhos de mais baixa qualidade e a eficiência da mesa densimétrica em estratificar os grãos. A diferença da EMAn entre as idades das aves sugere melhor eficiência de utilização da energia com o avanço da idade. As equações de predição podem ser utilizadas para estimar o valor energético de milhos, tanto por sua classificação como pela densidade. Entretanto, o erro sistemático associado a cada equação de predição pode comprometer a exatidão de seu valor nutricional. As contaminações por aflatoxinas e tricotecenos variam com a qualidade do milho estratificado, fator importante a ser considerado na alimentação de frangos de corte.
    Preview · Article · May 2008
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    ABSTRACT: Um experimento foi realizado com 200 frangos de corte machos da linhagem Cobb, a fim de avaliar desempenho, características de carcaça e teores de colesterol em tecidos e soro quando alimentados com rações compostas por milho e farelo de soja suplementadascom diferentes níveis de semente e casca de maracujá. Os tratamentos foram: 4% de casca, 8% de casca, 4% semente e 8% semente. O delineamento experimental utilizado foi o inteiramente casualizado em modelo fatorial 2x2, com um tratamento adicional, quatrorepetições e dez aves por unidade experimental. Foram utilizados contrastes ortogonais com dois níveis de suplementação e dois subprodutos. As aves foram criadas com as rações experimentais a partir de 22 dias e abatidas aos 42 dias de idade para a coleta de dados. A utilização de subprodutos de maracujá modificou os teores de colesterol nos tecidos sem afetar a maior parte das características de desempenho das aves. A semente e casca de maracujá reduziram o conteúdo de colesterol presente nos músculos do peito e da perna. A trial was performed using two hundred male Cobb broilers to evaluate the performance, carcass characteristics and cholesterollevels in the tissue and serum, when fed diets based on corn and soybean meal supplemented with different levels of passion fruit seed and peel. The following treatments were evaluated: blank treatment, 4% of peel, 8% of peel, 4% of seed and 8% of seed. A completely randomized experimental design was used with a 2 x 2 factorial scheme with an additional treatment, four repetitions and ten birds per experimental unit. A model of orthogonal contrast was used, withtwo levels of supplementation and two kinds of byproducts. The birds were raised with the experimental diets from 22 to 42 days of age; they were then slaughtered for collection of data. The use of passion fruit by-products modified the cholesterol levels without affecting the majority of the performance characteristics of the broilers. The seeds and peel of passion fruit reduced the cholesterol contents in the breast and leg.
    No preview · Article · Jan 2008
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    ABSTRACT: Curva de postura, exigencias nutricionales.
    Full-text · Article · Jan 2008
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    ABSTRACT: Was carried an experiment with the objetive to evaluate the use of five levels of sugar (0, 4, 8, 16 and 32%) in substitution to the corn in the feed of broilers in the finishing phase. 320 chickens with 22 days of age, were randomly distributed for 20 box. The birds received water and feed ad libitum in all experimental period. The diets were isonetrogenous an isocaloric. The performance of the birds was evalueted. The birds were weigthed at 42 days of age and four birds of each experimental unit, two males and two females, were kept without food for a 12 hours. After this period the birds were slaughtered and eviscerated and carcass weight and yield as wells cuts yield were collected. Water, protein and body fat were observed. There was quadratic effect or the ration consumption, being 20.73 the point of maximum intake. The sugar influenced in a positive lineal way the weight and abdominal fat of the males. In the females negative lineal effect was for chest yield. With relations to the fat deposition and protein in the carcass, the levels of sugar didn´t influence in the males, in the females they caused positive linear effect for the fat body deposition. Fue realizado un experimento con el objetivo evaluar la utilización de cinco niveles de azúcar (0, 4, 8, 16 y 32%) en substitución del maíz en la alimentación de pollos asaderos en fase de terminación. 320 pollos con 22 días de edad, fueron distribuidos al acaso en 20 lotes. Las aves recibieron agua y alimento a voluntad durante toda la fase experimental, las raciones fueron isoprotéicas e isocalóricas. Fueron evaluadas las características de desempeño; a los 42 días de edad las aves fueron pesadas y retiradas 4 de cada unidad experimental, dos machos y dos hembras, que posteriomente fueron sometidas a ayuno de 12 horas y luego sacrificadas y evisceradas, para evaluar peso y rendimiento de canal y de cortes nobles. Tambien fueron observados los contenidos de agua, proteína y grasa corporal. Hubo efecto cuadrático para consumo de ración, siendo 20.73 el punto de maxima ingestión. El azúcar influyó de forma lineal positiva sobre el peso y rendimiento de grasa abdominal en los machos. En la hembras hubo efecto lineal negativo para rendimiento de pechuga. Los niveles de azúcar no influenciaron los contenidos de grasa y proteína en la canal de machos, en la hembras causaron efecto lineal positivo en la cantidad de gordura corporal.
    Preview · Article · Jan 2008
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    Full-text · Article · Dec 2007
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    ABSTRACT: The fatty acids composition of broiler tissue was evaluated using two hundred male Cobb chicks. They were raised from 22 days of age with experimental diets based on corn and soybean meal supplemented with 4 or 8% of passion fruit peel and 4 or 8% of passion fruit seed. A completely randomized experimental design was used with a 2 x 2 factorial arrangement with an additional treatment (Control, 0% of passion fruit byproducts), with four replications and ten birds per experimental unit. A orthogonal contrast with two levels of supplementation and two types of byproducts., The birds were slaughtered at 42 days of age for fatty acids composition analyses. The use of passion fruit seed reduced the content of palmitic C16:0, estearic C18:0 and docosahexaenoic acid C22:6 in the breast. In the leg, passion fruit byproducts increased the content of linoleic C18:2, linolenic C18:3 and palmitic acid C16:0 and reduced the content of estearic acid C18:0.
    No preview · Article · Nov 2007 · Revista Brasileira de Zootecnia
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    ABSTRACT: One aimed in this work to evaluate, weekly, the egg yolk colour grade of japanese quails fed on diets with different levels of spice (163.8 mg bixin/100 g), in course of four weeks. Two hundred and forty japanese female quails (Coturnix japonica) were used in a completely randomized block outline, with eight treatments, five replicates and six quails per experimental unit. The treatments, consisted of eight experimental diets resultant from the combination of four spice levels in the diets (0, 1.5, 3.0 a 4.5%) and two energetic sources (corn and broken rice grains), were allotted to the plots, while the four experimental days (7(th), 14(th), 21(st) a 28(th)) consisted the splitplots. The estimated regression equation with the use of logarithmic model explained 96% of the variation of yolk colour scores data. At the 7(th) and 14(th) experimental days, the estimated spice levels that promoted yolk colour scores with free-range pattern (8.5 to 9.0 points) were 1.5%, for corn based rations, and 3.0%, for broken rice grains based rations. At the 21(st) and 28(th) experimental day, the estimated values were 0.75% (diets with corn) and 2.25% (diets with broken rice grains). In diets with 46% of corn or broken rice grains, the use of upper levels to 3.0% of spice increased the pigment losses by excreta and consequent capacity decrease of store yolk pigments.
    No preview · Article · Sep 2007 · Ciência e Agrotecnologia
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    ABSTRACT: Foram utilizadas 400 codornas fêmeas com peso médio de 7,3g + 0,3g no período de um a 42 dias de idade. O delineamento experimental foi o inteiramente casualizado, com cinco tratamentos e quatro repetições com 20 aves por unidade experimental. Os tratamentos consistiram em cinco níveis de lisina total na ração (0,90%; 1,05%; 1,20%; 1,35%; 1,50%). As características avaliadas foram: consumo de ração médio diário (g/ave/dia) e acumulado (g/ave/período); peso médio das aves (g), ganho em massa corporal acumulado (g/ave/período), conversão alimentar (g de ração consumida/g de ganho de peso), mortalidade (%/período) e uniformidade (%/período). Também foi descrita a curva de crescimento das codornas para cada nível de lisina total utilizado. Não foi verificado efeito significativo para nenhuma das características avaliadas (P>0,05). O nível de 0,90% de lisina total em rações com 20,70% de proteína bruta atendeu às exigências de codornas japonesas durante o período de crescimento, correspondendo a um consumo diário, por ave, de 96,9 mg de lisina total.
    Full-text · Article · Aug 2007 · Ciência e Agrotecnologia