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Registros recuperados: 31
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Avaliação das Propriedades do Ácido Nicotínico no Desempenho e no Balanço Térmico de Frangos de Corte Durante Estresse por Calor Rev. Bras. Ciênc. Avic.
Ribeiro,AML; Mahmoud,H; Teeter,RG; Penz Jr,AM.
Foram oferecidas 4 doses de ácido nicotínico (AN) na água de beber de frangos de corte, a fim de estudar seu efeito no desempenho e na produção de calor em condições de estresse por calor (6 h de 35º C). As doses foram 15, 100, 330 e 1000 mg/L. Não houve efeito do AN nas doses usadas para ganho de peso, consumo de alimento, eficiência alimentar, consumo de água e temperatura retal. Foram observadas algumas alterações devido ao AN e estresse por calor nos parâmetros sangüíneos das aves. A produção de calor (kcal/h/peso metabólico) diminuiu com o uso de 100 e 1000 mg/L comparados com 15 mg/L. Nas dosagens usadas não foi observado efeito benéfico do AN no controle do estresse por calor.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ácido nicotínico; Frangos de corte; Estresse por calor.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000100004
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Comparison between linear and nonlinear systems of feed formulation for broilers Rev. Bras. Ciênc. Avic.
Dadalt,JC; Butzen,FM; Ribeiro,AML; Renz,SV; Kessler,A de M; Penz Júnior,AM.
Two experiments were simultaneously carried out to compare feed formulation models: a linear model for minimum cost with a nonlinear model for maximum profitability for one-to 42-d-old broilers. One-d-old male or female Cobb 500 broilers (n=2368) were allocated to one of the two trials according to sex. The experiments were performed simultaneously in an experimental poultry farm. Two housing densities were used: high density (HDH), with 14 birds/m2, and low density (LDH), with 10 birds/m2. The following treatments were evaluated: linear feed formulation and LDH (LF10); nonlinear formulation and LDH (NF10); linear formulation and HDH (LF14); and nonlinear formulation and HDH (NF14). A completely randomized design with four treatments of eight replicates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feed efficiency; Nutritional strategies; Profitability.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100109
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Comparison of the effects of semi-refined rice oil and soybean oil on meat oxidative stability, carcass yield, metabolism, and performance of broilers Rev. Bras. Ciênc. Avic.
Moraes,ML de; Ribeiro,AML; Kessler,A de M; Cortés,MM; Ledur,VS; Cura,E.
Two experiments (EXP 1 and EXP 2) were conducted to compare soybean oil (SO) and semi-refined rice oil (RBO) added to broilers diets. In EXP 1, 400 male Ross x Ross 308 broilers were reared in battery cages, and their performance was evaluated. A metabolism assay was performed. In EXP 2, 1344 broilers from the same strain were reared in floor pens with rice husks litter. In addition to performance, carcass yield and meat oxidative stability were evaluated. In both EXP, birds were distributed in a 2x4 factorial arrangement, with two types of oils (SO or RBO) and four oil inclusion levels (1%, 2.5%, 4%, or 5.5%). Two periods were considered: starter (1 to 21 days of age) and grower (22 to 42 days). In both EXP, oil type had no influence on starter...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler; Carcass; Metabolism; Rice oil; Soybean oil; Performance.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000300004
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Compensatory water consumption of broilers submitted to water restriction from 1 to 21 days of age Rev. Bras. Ciênc. Avic.
Viola,TH; Ribeiro,AML; Penz Jr.,AM.
A hundred and fifty male Ross 308 broilers were submitted to water restriction (WR) in different levels (0 to 40%) until 21 days of age. The birds received water ad libitum from 22 to 28 days of age and the compensatory consumption of water (CConW) was calculated as the difference in water intake between birds submitted and not submitted to WR. All WR groups showed a compensatory consumption of water, mainly during the first days of the ad libitum period. The water intake in such groups decreased as the birds adapted to the new condition. Higher water intake was observed in birds with 30 and 40% WR than in birds with 10% WR. Furthermore, chickens showed an unusual drinking and feeding behavior during the restriction period.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broilers; Compensatory water consumption; Water restriction.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000400008
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Determination of apparent metabolizable energy of crude glycerin in broilers chickens Rev. Bras. Ciênc. Avic.
Gianfelici,MF; Ribeiro,AML; Penz Jr,AM; Kessler,AM; Vieira,MM; Machinsky,T.
The objective of the experiment was to determine the Apparent Metabolizable Energy corrected for nitrogen (AMEn) of a glycerin product derived from biodiesel production for broilers. A number of 35 male Ross 308 broilers, with 35 days of age was fed ad libitum diets containing 0, 5, 10, 15, or 20% glycerin. AMEn was determined using total excreta collection, with four days of adaptation and three days of collection. Increasing glycerin intakes resulted in increased water excretion. Glycerin AMEn varied as a function of dietary inclusion levels, and a cubic equation was identified by regression analysis. Maximum AMEn level- 4890 kcal/kg DM- was obtained with 15% glycerin inclusion. However, this level caused excessive water excretion, making its use...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycerol; Metabolism; Water excretion.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400006
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Development and Performance of a Mechanical Egg Collection System Versus the Hand-Operated Dutch Nest Rev. Bras. Ciênc. Avic.
Pilotto,F; Ribeiro,AML; Cargnelutti Filho,A; Klein,VA.
ABSTRACT The aim of this study was to design a new mechanical nesting system based on scientific works on the behavior of laying hens, and to compare its performance with that of a hand-operated Dutch nest. The equipment was assessed in two poultry houses; in the first one, the eggs were collected manually, whereas in the second one, the newly designed mechanical nest was used for the collection. A total of 7,800 hens and 800 males were housed in each poultry house, and the percentages of eggs produced, nest dirty eggs, floor eggs, and cracked and discarded eggs were determined between weeks 25 and 52. The percentage of eggs with microcracks, infertility, embryo mortality, bacterial contamination, fungal contamination, chicks with stunting syndrome and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler breeders; Laying behavior; Mechanical nest.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400523
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Effect of an Enzyme Blend on the Performance, Diet Metabolizability, Phosphorous Retention, and Bone Mineralization of Broilers Fed Diets Containing Defatted Rice Bran Rev. Bras. Ciênc. Avic.
Moraes,ML; Ledur,VS; Kessler,AM; Machado,PHM; Della,MP; Ribeiro,AML.
An experiment was conducted to evaluate the effect of an enzyme blend (EB) on the performance, diet metabolizability, phosphorus (P) retention, and bone mineralization of broilers fed diets containing 10% defatted rice bran (DRB). In total, 432 one- to 38-d-old male Cobb broilers were evaluated according to a completely randomized experimental design in 3 x 2 factorial arrangement. Three diets were tested with two nutrient reductions (NR) in the matrix (standard diet; NR I of 75 kcal/kg ME, 0.1% Ca and 0.1% available P; and NR II of 100 kcal/kg ME, 0.1% Ca and 0.1% available P) with or without the addition of an EB (200 g/t). The coefficients of total tract apparent retention (CTTAR) of the diets and P retention were determined by collecting excreta during...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler chicken; Defatted rice bran; Enzyme blend; Metabolism; Mineral retention; Performance.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200191
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Effect of chick weight, geometric mean diameter and sodium level in prestarter diets (1 to 7 days) on broiler perfomance up to 21 days of age Rev. Bras. Ciênc. Avic.
Ribeiro,AML; Krabbe,EL; Penz Júnior,AM; Renz,SV; Gomes,HA.
Seven hundred and twenty Ross 308 chicks were raised in a controlled environment room, distributed in a factorial design with 3 hatching chick weights (37, 40 and 44 g), 3 geometric mean diameter (GMD) (0.561; 0.783 and 0.997 mm) and 4 total sodium levels (Na) (0.12; 0.24; 0.36 and 0.48%) in the pre-starter diet (1 to 7 days). From 8 to 21 days (d) one single basal diet was used for all treatments. The thirty seven-gram chicks had the smallest yolk sack weight at 4d, smallest body weight (BW) and feed intake (FI) at 7d and 21d, but the same feed conversion (FC) than the other groups of hatching weight. Chicks receiving diet with intermediate GMD had the greatest BW and FI at 7d, but at 21d this effect was no longer seen. The diet with finest particle size...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Average geometric diameter; Broilers; Initial weight; Pre-starter diets; Sodium.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400006
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Effect of dietary fiber and genetic strain on the performance and energy balance of broiler chickens Rev. Bras. Ciênc. Avic.
Krás,RV; Kessler,AM; Ribeiro,AML; Henn,JDi; Santos,II dos; Halfen,DP; Bockor,L.
The experiment was conducted to evaluate the effect of dietary fiber on the performance and energy balance of broiler chickens of a fast-growing strain (Cobb500) and a slow-growing strain (Label Rokens during the period of 1 one to 42 days of used In total, 360 male broilers (240 fast-grorain and 120 slow-grtrain)were, housed in collective cages. A completely randomized experimental dewith in a 3x2 factorial arrangement was applied, consisting of three groups of birds (slow-growing - SG; fast-growing fed ad libitum - FGAL; and fast-growing pair-fed with SG broilers - FGPF) and two iso-protein dis (a 3100 kcal ME/kg low-fiber diet and a 2800 kcal ME/kg high-fiber diet- Hwith containing 14% wheat bran and 4% oat hulls). Dietary fiber level did not affect...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cobb; Label Rouge; Pair-fed; Wheat bran.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000100003
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Effect of dietary fiber, genetic strain and age on the digestive metabolism of broiler chickens Rev. Bras. Ciênc. Avic.
Krás,RV; Kessler,A de M; Ribeiro,AML; Henn,JD; Bockor,L; Sbrissia,AF.
In this study, 360 male broilers, out of which 240 of a fast-growing strain (Cobb500), and 120 of a slow-growing strain (Label Rouge), were used to evaluate the effect of dietary fiber on digesta transit time and digestive metabolism during the period of 1 to 42 days of age. A completely randomized experimental design with a 3x2 factorial arrangement was applied, consisting of three groups of birds (slow-growing - SG; fast-growing fed ad libitum - FGAL; and fast-growing pair-fed with SG broilers - FGPF) and two iso-protein diets (a 3100 kcal ME/kg low-fiber diet - LFD- and a 2800 kcal ME/kg high-fiber diet - HFD- with 14% wheat bran and 4% oat hulls). HFD-fed birds presented lower ME retention (p < 0.001) and lower dry matter metabolizability (DMM) (p...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Age; Fiber; Metabolism; Pair-fed; Strain.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200003
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Effect of different dietary concentrations of Amino Acids on the performance of two different Broiler Strains Rev. Bras. Ciênc. Avic.
Ebling,PD; Ribeiro,AML; Trevizan,L; Silva,ICM da; Kessler,A de M; Rubin,LL.
Four Nutritional Programs (NP) used in the Brazilian poultry industry were tested in two broiler strains (Cobb 500 and Ross 308). NP varied in the concentrations of their main essential amino acids (AA) and were classified as Low, Regular, High and Mixed (high AA concentrations up to 21 days and regular concentrations after that). Minimum digestible Met+Cys/Lys, Thr/Lys, Arg/Lys, Ile/Lys, and Val/Lys ratios were 0.74, 0.64, 1.05, 0.65 and 0.75, respectively, in all NP, and no minimum amount of CP was fixed. There were no interactions between strain and NP for any of the evaluated responses. From 1 to 47 days of age, birds fed the Low NP presented lower average body weight and body weight gain (BWG). The high NP allowed for better feed conversion ratio...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Economic evaluation; Brazilian nutritional programs; Carcass yield.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400008
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Effect of the supplementation of vitamins and organic minerals on the performance of broilers under heat stress Rev. Bras. Ciênc. Avic.
Laganá,C; Ribeiro,AML; Kessler,AM; Kratz,LR; Pinheiro,CC.
The objective of this experiment was to evaluate the effect of diet supplementation with vitamins C and E and organic minerals Zn and Se on the performance of 1 to 35 day-old broilers from, kept under cyclic heat stress (25 to 32ºC). Four levels of vitamin-mineral supplementation were used (T1-control diet (60/30 IU of vit E for starter and growing diet, respectively, zero vit. C, 80 ppm of inorganic Zn, 0.3 ppm of inorganic Se); T2-control diet + 100 UI vit E and 300 ppm vit C/kg; T3-control diet + 40 ppm Zn and 0,3 ppm Se/kg; T4-control diet + T2 and T3 levels) and two environments - thermoneutral and cyclic heat stress (TN and HS) from 14 to 35 days of age. In the period when part of the birds was submitted to HS, from 14 to 35 days, it was observed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascorbic acid; Dl-alpha-tocopherol; Selenium; Thermal regulation; Zinc.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100006
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Effect of vitamin E levels on the cell-mediated immunity of broilers vaccinated against coccidiosis Rev. Bras. Ciênc. Avic.
Silva,ICM da; Ribeiro,AML; Canal,CW; Vieira,MM; Pinheiro,CC; Gonçalves,T; de Moraes,ML; Ledur,VS.
Studies on the relationships between animal nutrition and immunity have sought reliable methodologies to measure responses. Cell-mediated immune response is similarly studied in humans. The cutaneous basophil hypersensitivity test (CBH) is one of the methods to measure that response and consists in the infiltration of inflammatory cells, particularly of lymphocytes and basophils, as result of the application of substances capable of inducing cell proliferation in determined sites, such as wings, wattle, and interdigital space in birds. CBH is considered a simple and fast method and can be applied in birds of different ages. In immunocompetence studies with poultry, phytohemagglutinin-P (PHA-P) is a commonly used substance, despite the variability of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler; Coccidiosis; Cell-mediated immune response; Newcastle disease; Vaccine; Vitamin E.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000100008
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Effects of corn particle size and physical form of the diet on the gastrointestinal structures of broiler chickens Rev. Bras. Ciênc. Avic.
Dahlke,F; Ribeiro,AML; Kessler,AM; Lima,AR; Maiorka,A.
The objective of this experiment was to investigate the effects of different particle sizes, expressed as Geometric Mean Diameter (GMD) of corn (0.336mm, 0.585mm, 0.856mm and 1.12mm) of mash and pelleted broiler chicken diets on the weight of the gizzard, duodenum and jejunum+ileum; on the pH of the gizzard and small intestine and on the characteristics of the duodenal mucous layer (number and height of villi and crypt depth) in 42-day-old broilers. The physical form and the particle size of the diet had no significant effect on gizzard and intestine pH (p > 0.05). A greater gizzard weight was seen in the birds receiving pelleted diet and particle size of 0.336mm (p < 0.008). However, for the particle sizes of 0.856 and 1.12 mm, a greater weight was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crypt depth; Geometric mean diameter; Intestine weight; Intestine pH; Villus height.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000100008
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Effects of prebiotics and probiotics on the colonization and immune response of broiler chickens challenged with Salmonella Enteritidis Rev. Bras. Ciênc. Avic.
Ribeiro,AML; Vogt,LK; Canal,CW; Cardoso,MRI; Labres,RV; Streck,AF; Bessa,MC.
The present study aimed at evaluating the effect of the prebiotic Bio Mos™ (2 kg/ton up to 10 days; 1 kg/ton from 10 to 21 days; and 0.5 kg/ton from 21 days to slaughter), of the probiotic Lac XCL 5x™ (by spray-mixing), of a combination of the two supplements (prebiotic + probiotic), and of one growth promoter antimicrobial agent (Avilamycin at 15 ppm). Birds were orally challenged with inoculated Salmonella Enteritidis (SE) 10(6) CFU at 3 days of age. Four hundred and eighty male Ross chicks were used. The experiment lasted 28 days, and the analyses were conducted at 15 and 28 days of age. Cecum and liver bacterial colonization of production of anti-SE antibiodies, intestinal micrometry and bird performance were assessed. Neither the prebiotic, nor the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Additives; Birds; Immunity; Salmonellosis.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000300009
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Effects of the Addition of Pure Glycerin Supplementation in the Drinking Water on the Performance of Broilers Submitted to Heat Stress and Feed Restriction Rev. Bras. Ciênc. Avic.
Moraes,PO; Ceron,MS; Borille,R; Gianluppi,RDF; Lovato,GD; Cardinal,KM; Ribeiro,AML.
ABSTRACT The experiment was conducted to study the effect of pure glycerin supplementation (GLYC) in the drinking water of broilers subjected to heat stress and feed restriction. Water with 0, 1, or 2% glycerin was provided ad libitum to broilers in six hours of feed restriction. The birds were housed in two environments: thermoneutral (TN) - 25 ° C, and cyclic heat stress (HS) - 12h with 250C, 6h with 320C, 3h of 250 to 320C and 3h of 320 to 250C. The experimental design was randomized in a factorial arrangement of 2 x 3 + 2, with three GLYC levels, two environments and one control group with ad libitum feeding each environment. When submitted to HS, broiler receiving 2% glycerin presented higher weight gain (WG), water consumption (WC), feed intake (FI)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental temperature; Feed restriction; Glycerol; Performance; Water consumption.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300413
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Effects of the reduction of dietary heat increment on the performance, carcass yield, and diet digestibility of broilers submitted to heat stress Rev. Bras. Ciênc. Avic.
Laganá,C; Ribeiro,AML; Kessler,AM; Kratz,LR; Pinheiro,CC.
This experiment aimed at verifying the effect of different diets and thermal environments on the performance, carcass yield, and diet digestibility of 21 to 42-day-old broilers. A total number of 288 21-day-old male Ross broilers were distributed in a 2 x 2 + 2 factorial arrangement, with six replicates, including the following factors: two environments (TNE - thermoneutral: 21-25ºC and 73% RH; CHS - cyclic heat stress: 25-32ºC and 65%RH), and two diets (control: 2.4% soybean oil and 19.5% protein; summer: 4.0% soybean oil and 18.5% protein). In TNE, two additional treatments were included with feed restriction of birds fed both the control and summer diets (pair-feeding), thereby maintaining the same feed intake level for both types of diet. Diet did not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Environment temperature; Fat; Poultry nutrition; Protein; Feed restriction.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100007
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Fatty-Acid composition of free-choice starter broiler diets Rev. Bras. Ciênc. Avic.
Kessler,AM; Lubisco,DS; Vieira,MM; Ribeiro,AML; Penz Jr,AM.
Two experiments were carried out to evaluate the inclusion of vegetable oils with different fatty acid content in starter and pre-starter broiler diets. In Experiment I 480 1- to 9-day-old male Ross 308 broilers were fed diets containing corn oil (CO), acid corn oil (ACO), linseed oil (LO) or coconut fat (CoF). Chicks were distributed according to a factorial 2x2x2arrangement (2 free fatty acids - FFA ) x (2 n6:n3 ratios) x (2 medium-chain fatty acids levels - AGMC). Performance responses and dry matter (DMM), crude protein (CPM), and crude fat (CFM) metabolizability were evaluated. In Experiment II, 480 1- to 20-day-old male Ross 308 broilers were offered the free choice of 2 different diets: with no fat addition, or with 10% addition of the following fat...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Linseed oil; Metabolizable energy; N6:n3 ratio; Soybean oil; Voluntary intake.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100006
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Granulometria do Milho em Rações de Crescimento de Frangos de Corte e seu Efeito no Desempenho e Metabolismo Rev. Bras. Ciênc. Avic.
Ribeiro,AML; Magro,N; Penz Jr,AM.
Foram realizados dois experimentos para avaliar os efeitos da granulometria do milho das rações, expressa pelo diâmetro geométrico médio (DGM), 0,337; 0,574; 0,680; 0,778; 0,868 e 0,936mm, sobre o desempenho, o metabolismo energético e a morfologia intestinal (número e altura de vilosidades do duodeno) de frangos de corte machos, de 21 aos 42 dias de idade. No 1° experimento, partículas de 0,868 mm proporcionaram às aves maior consumo de ração, maior ganho de peso e melhor conversão alimentar. A altura das vilosidades intestinais não foi influenciada pelo DGM das dietas, mas aumentou com a idade das aves (21, 35 e 42 dias de idade). Não foi observado efeito da granulometria sobre a deposição de gordura abdominal ou sobre as proporções das partes da...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Granulometria; Milho; Frangos de corte.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000100006
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Growth and deposition of body components of intermediate and high performance broilers Rev. Bras. Ciênc. Avic.
Henn,JD; Bockor,L; Ribeiro,AML; Coldebella,A; Kessler,A de M.
The objectives of the present study were to determine the parameters of Gompertz equations and to determine curves and growth rate, feed intake and body component deposition, as well as allometric coefficients of body water, protein, and fat relative to live weight of male and female broilers of intermediate performance (C44) and high performance (Cobb-500) genetic strains. In total, 384 one-d-old chicks were distributed into four treatments: male Cobb 500, male C44, female Cobb 500, and female C44, with six replicates of 16 birds, according to a completely randomized experimental design. Average body weight, weight gain, and feed intake were weekly determined, and six birds, representing the average weight of each treatment, were sacrificed to determine...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body composition; Gompertz curve; Growth rate; Cobb 500; C44.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300014
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