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Dive into the research topics where Jorge Vitor Ludke is active.

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Featured researches published by Jorge Vitor Ludke.


Meat Science | 2013

Effects of genotype and dietary oil supplementation on performance, carcass traits, pork quality and fatty acid composition of backfat and intramuscular fat

Teresinha Marisa Bertol; R.M.L. de Campos; Jorge Vitor Ludke; Nelcindo Nascimento Terra; E.A.P. de Figueiredo; Arlei Coldebella; J. I. dos Santos Filho; Vicky Lilge Kawski; N.M. Lehr

A 42-day study was conducted to evaluate the effect of genotype: terminal sire line Duroc×F1 (DC×F1); terminal sire line Embrapa MS-115×F1 (MS-115×F1); and MS-115×Moura (MS-115×MO) and three dietary oil sources: soybean; canola; and canola+flax, on performance, carcass traits, pork quality, and fatty acid composition. Genotype affected the technological quality of pork and fatty acid profile. MS-115-sired pigs had better meat color and Duroc-sired pigs had higher intramuscular fat content, more saturated fat and better omega-6/omega-3 ratio. Moura breed influenced positively meat tenderness and intramuscular fat. Diet did not affect the technological quality of the meat. Canola or canola+flax oil diet supplementations increased monounsaturated and C18:3 and decreased C18:2 fatty acids, reducing the omega-6/omega-3 ratio. The best omega-6/omega-3 ratio was obtained through supplementation with canola+flax.


Revista Brasileira De Zootecnia | 2000

Efeito de diferentes fontes protéicas sobre desempenho, composição corporal e morfologia intestinal em leitões

Teresinha Marisa Bertol; Jorge Vitor Ludke; Nelson Morés

A study was carried out to evaluate the effect of dried skim milk (LDP) in weaning diets containing different levels of high-protein soybean meal (PCS), for piglets weaned at 21 days of age. Five diets were compared, from weaning to 14 days post-weaning: T1 - basal diet, soybean meal (FS) as the main protein source; T2 and T4 - replacement of 30 and 50%, respectively, FS from basal diet by PCS; T3 and T5 - replacement of 30 and 50%, of FS from basal diet by PCS and 20% by LDP, respectively. The partial replacement of FS by PCS or LDP did not affect the performance neither the body composition or deposition tissues ratios of piglets in anyone of the evaluated period. The mucous membrane height and villus height at 14 days post-weaning were not affected by the protein source of the diet, but crypt depth was reduced by PCS, regardless of diet supplementation with LDP. The protein source did not affect performance neither body composition of piglets, but PCS provided a reduction of morphologic changes of the intestinal mucous membrane, signed by the reduction of the crypt depth.A study was carried out to evaluate the effect of dried skim milk (LDP) in weaning diets containing different levels of high-protein soybean meal (PCS), for piglets weaned at 21 days of age. Five diets were compared, from weaning to 14 days post-weaning: T1 - basal diet, soybean meal (FS) as the main protein source; T2 and T4 - replacement of 30 and 50%, respectively, FS from basal diet by PCS; T3 and T5 - replacement of 30 and 50%, of FS from basal diet by PCS and 20% by LDP, respectively. The partial replacement of FS by PCS or LDP did not affect the performance neither the body composition or deposition tissues ratios of piglets in anyone of the evaluated period. The mucous membrane height and villus height at 14 days post-weaning were not affected by the protein source of the diet, but crypt depth was reduced by PCS, regardless of diet supplementation with LDP. The protein source did not affect performance neither body composition of piglets, but PCS provided a reduction of morphologic changes of the intestinal mucous membrane, signed by the reduction of the crypt depth.


Revista Brasileira De Zootecnia | 2009

Inclusion of guava wastes in feed for broiler chickens.

Rosa Cavalcante Lira; Carlos Bôa-Viagem Rabello; Paulo Vanderlei Ferreira; Geraldo Roberto Quintão Lana; Jorge Vitor Ludke; Wilson Moreira Dutra Júnior

Com o objetivo de avaliar o efeito da inclusao de residuo de goiaba na racao sobre o desempenho e rendimento de carcacas de frangos de corte foi realizado um experimento com 300 pintos machos Cobb, em delineamento inteiramente casualizado, com cinco niveis de residuo e cinco repeticoes. Avaliaram-se uma racao-referencia a base de milho e farelo de soja e quatro racoes com 3, 6, 9 ou 12% de residuo de goiaba. Semanalmente, avaliaram-se o consumo de racao, o ganho de peso e a conversao alimentar; o peso ao abate e o peso e rendimento de carcaca eviscerada, carcaca sem pes e cabeca, peito, coxa, sobrecoxa, asa, dorso, visceras comestiveis e gordura abdominal. A inclusao de residuo de goiaba na racao promove desempenho e rendimento de carcaca semelhante ao obtido com racao a base de milho e farelo de soja, portanto esse subproduto agroindustrial pode ser utilizado em niveis de ate 12% em racoes para frangos de corte.


Revista Brasileira De Zootecnia | 2001

Efeito do peso do suíno em terminação ao início da restrição alimentar sobre o desempenho e a qualidade da carcaça

Teresinha Marisa Bertol; Jorge Vitor Ludke; C. Bellaver

This experiment was carried out to determine the best live weight to start the feed restriction (RA) in order to improve the performance and carcass quality of barrows and gilts at the finishing phase, fed with dry feed, in the winter period. Four treatments was compared: T1 - Full fed (AV) until the slaughter time, T2 - AV until 90 kg LW and after that 10% RA; T3 - AV until 75 kg LW and after that 10% RA; T4 - AV until 60 kg LW and after that 10% RA. The study started when animals had 52.58 ± 2.34 kg LW and finished with 119.27 ± 1.99 kg LW, when the animals were slaughtered. The feed restriction started at whatever age reduced the average daily gain (GPD), but feed: gain ratio (F/G) was not improved neither carcass traits of the barrows. In the gilts, RA reduced GPD only in that, which started RA at 60 kg LW and feed: gain was not improved neither carcass traits with RA started at whatever age. Therefore, swine with high potential to lean meat deposition and low feed intake, fed with dry diets, which contain suitable levels of amino acids, do not respond to energy restriction starting between 60 and 90 kg to improve performance and carcass quality.


Revista Brasileira De Zootecnia | 2000

Níveis de suplementação com lactose na dieta de leitões desmamados

Teresinha Marisa Bertol; Jonas Irineu dos Santos Filho; Jorge Vitor Ludke

Foram comparados quatro niveis de inclusao de lactose (0, 7, 14 e 21%) na dieta pre-inicial de leitoes desmamados aos 21 dias de idade, com o objetivo de definir qual o melhor nivel de lactose para a dieta de desmame nesta idade. As dietas experimentais foram fornecidas do dia do desmame ate 14 dias apos e os leitoes foram acompanhados ate o final da fase de creche, aos 35 dias apos o desmame. O ganho de peso diario (GPD) e o consumo de racao diario (CRD) de 0 a 14 dias apos o desmame aumentaram linearmente (P<0,002, Y=151+3,26X e P<0,0002, Y=247+4,04X, respectivamente), enquanto a conversao alimentar (CA) reduziu linearmente (P<0,08, Y=1,73-0,011X), com o aumento dos niveis de lactose na dieta. No periodo total de creche (0 a 35 dias), o GPD e o ganho de peso total (GPT) aumentaram linearmente (P<0,14, Y=339+6X, Y=11,86+0,23X, respectivamente), com o aumento dos niveis de lactose. O peso medio dos leitoes aos 14 (PM14), 28 (PM28) e 35 (PM35) dias apos o desmame tambem elevou-se linearmente (P<0,006, Y=9,90+0,027X, P<0,08, Y=17,06+0,024X e P<0,14, Y=19,81+0,223X), em consequencia do aumento dos niveis de lactose na dieta. Foi concluido que a suplementacao da dieta com lactose nas duas primeiras semanas apos o desmame melhorou o desempenho de leitoes desmamados aos 21 dias de idade. A definicao do melhor nivel de inclusao de lactose nas dietas de desmame dependera de uma avaliacao do custo adicional desta suplementacao em relacao ao ganho obtido no desempenho.Foram comparados quatro niveis de inclusao de lactose (0, 7, 14 e 21%) na dieta pre-inicial de leitoes desmamados aos 21 dias de idade, com o objetivo de definir qual o melhor nivel de lactose para a dieta de desmame nesta idade. As dietas experimentais foram fornecidas do dia do desmame ate 14 dias apos e os leitoes foram acompanhados ate o final da fase de creche, aos 35 dias apos o desmame. O ganho de peso diario (GPD) e o consumo de racao diario (CRD) de 0 a 14 dias apos o desmame aumentaram linearmente (P<0,002, Y=151+3,26X e P<0,0002, Y=247+4,04X, respectivamente), enquanto a conversao alimentar (CA) reduziu linearmente (P<0,08, Y=1,73-0,011X), com o aumento dos niveis de lactose na dieta. No periodo total de creche (0 a 35 dias), o GPD e o ganho de peso total (GPT) aumentaram linearmente (P<0,14, Y=339+6X, Y=11,86+0,23X, respectivamente), com o aumento dos niveis de lactose. O peso medio dos leitoes aos 14 (PM14), 28 (PM28) e 35 (PM35) dias apos o desmame tambem elevou-se linearmente (P<0,006, Y=9,90+0,027X, P<0,08, Y=17,06+0,024X e P<0,14, Y=19,81+0,223X), em consequencia do aumento dos niveis de lactose na dieta. Foi concluido que a suplementacao da dieta com lactose nas duas primeiras semanas apos o desmame melhorou o desempenho de leitoes desmamados aos 21 dias de idade. A definicao do melhor nivel de inclusao de lactose nas dietas de desmame dependera de uma avaliacao do custo adicional desta suplementacao em relacao ao ganho obtido no desempenho.


Revista Brasileira De Zootecnia | 2001

Proteínas da soja processadas de diferentes modos em dietas para desmame de leitões

Teresinha Marisa Bertol; Nelson Morés; Jorge Vitor Ludke; Márcia Regina Franke

One experiment was carried out to evaluate the partial substitution of soybean meal (FS) by others byproducts from soybean, obtained by different kinds of processing, as well as to compare these byproducts among themselves, as a protein source in the diets for piglets weaned at 21 days of age. With this aim, four treatments were compared: T1 - control diet, in which soybean meal was the only protein source; T2, T3 and T4 - 50% of the FS from control diet was substituted by full-fat extruded soybeans (SIE), texturized soybean protein (PTS) and concentrated soybean protein (PCS), respectively. Diets fed during 14 days post-weaning were isocaloric, isolisinic and containing the same level of dairy products, and they were fed from the weaning time up to 14 days after. Partial substitution of FS by whatever evaluated byproducts improved the average daily gains (GPD), average daily intake (CRD) and feed: gain (CA) in the feeding period of the diets. In the total nursery period, partial substitution of FS improved GPD and CRD, however CA was not affected. Incidence of diarrhea and intestinal mucous morphology were not affected by the different soybean byproducts. Substitution of 50% of FS by SIE, PTS or PCS in the weaning diet, promoted better performance, with additional 1 to 2 kg of body weight gains per piglet at the end of the nursery phase. Utilization of SIE, PTS and PCS as partial substitute of FS provided a similar response in the performance of piglets weaned at 21 days of age.


Brazilian Journal of Poultry Science | 2013

Performance of broilers fed during 21 days on mash or pellet diets containing whole or ground pearl millet grain

Thaysa Rodrigues Torres; M. do C. M. M Ludke; Jorge Vitor Ludke; Mjb dos Santos; Lima; Pa dos Santos

An experiment was carried out to evaluate the effect of the inclusion of 20% whole-grain or ground pearl millet (PM) in mash and pelleted diets on the performance, carcass traits, and organ weights of broilers reared until 21 days of age. A randomized block experimental design in a 3 x 2 factorial arrangement (diets containing corn and soybean meal, whole-grain PM, or ground PM x mash or pelleted diets), with five replicates per treatment and 10 birds per experimental unit, was applied. Diets were analyzed for mean geometric diameter, geometric standard deviation, pellet hardness, and density. Broiler performance, carcass yield, and organ weights were evaluated. On day 21, one bird with the average weight of each experimental unit was sacrificed for carcass evaluation. It was concluded that both as whole-grain and ground PM can be added to the diet of broilers up to 21 days of age. The dietary inclusion of PM results in higher abdominal fat deposition. Broilers fed the pelleted diets presented lower feed intake, better feed conversion ratio, lower gizzard and heart percentages, and higher carcass weight.


Scientia Agricola | 2014

Poultry offal meal in broiler chicken feed

Edney Pereira da Silva; Carlos Bôa-Viagem Rabello; Michele Bernardino de Lima; Jorge Vitor Ludke; Emmanuele Maria Florêncio de Arruda; Luiz Fernando Teixeira Albino

An outstanding feature of poultry production that provides animal protein yield for human feeding is its short production cycle. This characteristic has a linear relationship with waste production. Increasing the inclusion of this residue in diets in the near future is desirable in step with the growth of poultry production since it offers a better environmental and nutritional alternative to current methods. We evaluated the effects on the performance and carcass characteristics of broiler chickens produced by the inclusion of poultry offal meal (POM) in their feed. Treatments consisted of a control diet (corn, Zea mays and soybean, Glycine max) and four diets with inclusion of 30, 60, 90 and 120 g kg-1 of POM. The diets were formulated based on the level of digestible amino acid once categorized as isocalcic, isophosphoric, isosodic, isoenergetic and isonutritive for protein, methionine+cystine, lysine and threonine. The feeds electrolytes were corrected so that each diet had the same electrolytic balance. The variables analyzed were feed intake, weight gain, feed conversion ratio, body weight, carcass yield, chicken cut yield and abdominal fat. Feed intake was not affected by the quantities of POM added. The weight gain, feed conversion, carcass yield and noble cuts presented quadratic responses to the treatments. Abdominal fat increased linearly. The performance of the poultry, and carcass characteristics were maximized by the inclusion of 53 and 65 g kg-1, respectively, of POM in the diet, and the inclusion of 120 g kg-1 of POM provided greater disposition of abdominal fat.


Journal of Animal Science | 2017

Development and validation of equations to predict the metabolizable energy value of corn for pigs

Teresinha Marisa Bertol; D. L. Zanotto; Arlei Coldebella; Jorge Vitor Ludke

Three experiments were conducted with the aim of developing and validating an equation to predict the ME of corn for pigs from its chemical composition, physical characteristics and particle size. Exp. 1: Eight lots of corn were ground in a hammer mill, using 5 sieves with different screen opening sizes, generating 40 batches of ground corn. The chemical composition (DM, CP, ether extract, crude fiber, ADF, NDF, and ash) and physical characteristics (bulk density- BD and 1,000-kernel weight- TKW) were determined in the 8 lots and geometric mean diameter (GMD) and N-corrected ME (AMEn) were determined in the 40 batches of corn. The AMEn values were determined in 16 metabolism assays with pigs. Mathematical models were adjusted by regression analysis, based on the Akaike Information Criterion. Based on statistical parameters ( = 0.76 and prediction error = 1.05%), number of predictor variables, and easiness of measurements, an equation with 2 segments was chosen: y = 2845.41 + 0.9385 × BD - 20.8784 × CP, if GMD ≤ 522.98 and y = 3105.75 - 0.4978 × GMD + 0.9385 × BD - 20.8784 × CP, if GMD > 522.98. Exp. 2 and 3: Sixty four gilts (Exp. 1; 29.5 ± 3.8 kg) and 64 barrows (Exp. 2; 29.3 ± 3.6 kg), 1 lot of corn, and 3 particle sizes (GMD = 483, 632, and 904 µm) were used in a 3 × 2 factorial arrangement with 2 methods of diet formulation, differing in ME value of corn: FIX (value from nutrient composition table) vs. ESTIMATED (estimated for each particle size using the equation developed in Exp. 1). In Exp. 2, ADFI was greater ( < 0.05) and feed efficiency was lower ( < 0.05) in the diet with GMD of 904 µm compared to the diets with GMD of 632 or 483 µm, but only for diet formulation by the FIX method. In the treatments with GMD of 483 µm, gilts fed with the diet formulated by the ESTIMATED method had greater ( < 0.10) ADFI, backfat, fat area, and fat:meat ratio than gilts fed the diet formulated by the FIX method. In Exp. 3, particle size and formulation method did not affect ( > 0.10) growth performance and carcass traits of barrows. The equation developed was effective to adjust the ME value of corn, considering particle size variation. However, improvement to the proposed equation is necessary to achieve greater precision for predicting corn ME. Validation of the equation with more lots of corn of different chemical compositions and densities appears necessary to assess the efficacy of the equation regarding the variation of the other predicting variables.


Journal of Animal Science | 2016

Prediction of the metabolizable energy requirements of free-range laying hens

Mônica Maria de Almeida Brainer; C. B. V. Rabello; M. J. B. Santos; Cláudia da Costa Lopes; Jorge Vitor Ludke; José Humberto Vilar da Silva; R. A. Lima

This experiment was conducted with the aim of estimating the ME requirements of free-range laying hens for maintenance, weight gain, and egg production. These experiments were performed to develop an energy requirement prediction equation by using the comparative slaughter technique and the total excreta collection method. Regression equations were used to relate the energy intake, the energy retained in the body and eggs, and the heat production of the hens. These relationships were used to determine the daily ME requirement for maintenance, the efficiency energy utilization above the requirements for maintenance, and the NE requirement for maintenance. The requirement for weight gain was estimated from the energy content of the carcass, and the diets efficiency energy utilization was determined from the weight gain, which was measured during weekly slaughter. The requirement for egg production was estimated by considering the energy content of the eggs and the efficiency of energy deposition in the eggs. The requirement and efficiency energy utilization for maintenance were 121.8 kcal ME/(kg∙d)and 0.68, respectively. Similarly, the NE requirement for maintenance was 82.4 kcal ME/(kg∙d), and the efficiency energy utilization above maintenance was 0.61. Because the carcass body weight and energy did not increase during the trial, the weight gain could not be estimated. The requirements for egg production requirement and efficiency energy utilization for egg production were 2.48 kcal/g and 0.61, respectively. The following energy prediction equation for free-range laying hens (without weight gain) was developed: ME /(hen ∙ d) = 121.8 × W + 2.48 × EM, in which W = body weight (kg) and EM = egg mass (g/[hen ∙ d]).

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Teresinha Marisa Bertol

Concordia University Wisconsin

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Arlei Coldebella

Concordia University Wisconsin

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Vicky Lilge Kawski

Concordia University Wisconsin

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Maria do Carmo Mohaupt Marques Ludke

Universidade Federal Rural de Pernambuco

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Thaysa Rodrigues Torres

Universidade Federal Rural de Pernambuco

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Anildo Cunha Junior

Concordia University Wisconsin

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J. I. dos Santos Filho

Concordia University Wisconsin

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