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Adjustment of four growth models through Bayesian inference on weight and body nutrient depositions in laying quail R. Bras. Zootec.
Finco,Eline Maria; Marcato,Simara Márcia; Furlan,Antonio Claudio; Rossi,Robson Marcelo; Grieser,Daiane de Oliveira; Zancanela,Vittor; Oliveira,Taciana Maria Moraes de; Stanquevis,Caroline Espejo.
ABSTRACT An experiment was conducted to estimate the parameters of the Gompertz, Brody, Logistic, and Von Bertalanffy equations through Bayesian inference and evaluate the potential for growth in terms of weight and body composition of laying female quail (Coturnix coturnix japonica). The weights and body compositions of the birds were obtained weekly (1-119 days), allowing the adjustment of the four equations by Bayesian inference. The parameters mature weight (β1), integration constant (β2), maturity rate (β3), and their credibility intervals in four models on body weight and body components were properly estimated by Bayesian inference to describe the body growth in laying quail. The inflection point was determined by the 1st and 2nd derivatives of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adjust quality; Development; Maturity rate; Nonlinear models; Weight at maturity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001200737
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Análise bayesiana univariada e bivariada para a conversão alimentar de suínos da raça Piau PAB
Rossi,Robson Marcelo; Martins,Elias Nunes; Lopes,Paulo Sávio; Silva,Fabyano Fonseca e.
O objetivo deste trabalho foi apresentar modelagens alternativas, uni e bivariadas, para avaliação da conversão alimentar (CA) de suínos da raça Piau, com uso de inferência bayesiana. Os efeitos de sexo e genótipo sobre a CA dos animais foram avaliados por meio de procedimentos de simulação de Monte Carlo via cadeias de Markov (MCMC) e de integração aproximada aninhada de Laplace (INLA). O modelo univariado foi avaliado com diferentes distribuições para o erro - normal (gaussiana), t de Student, gama, log-normal e skew-normal -, enquanto, para o modelo bivariado, considerou-se o erro normal. A distribuição skew-normal foi o modelo mais parcimonioso para inferir sobre a resposta direta (univariada) da CA aos efeitos de sexo e genótipo, os quais não foram...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Análise multivariada; Desempenho nutricional; INLA; MCMC; Síndrome do estresse suíno..
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014001000754
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Aspectos genéticos de curvas de probabilidade de postura em codornas R. Bras. Zootec.
Rossi,Robson Marcelo; Martins,Elias Nunes.
Neste trabalho foram avaliados os componentes de covariância e as herdabilidades dos parâmetros da curva de produção de ovos em codornas em um modelo de duplo estágio: o primeiro estágio composto pelo ajustamento de uma curva não-linear e o segundo, pela avaliação dos parâmetros genéticos obtidos por meio do modelo animal. Foram utilizados registros individuais diários de postura até 90 dias, a contar do primeiro ovo no lote, de 308, 374 e 378 aves de três linhagens. Dentro de cada linhagem, não houve diferenças entre os componentes de covariância nem herdabilidades para as rações contendo diferentes níveis de energia (2.900 ou 2.500 kcal/kg de EM), indicando que não houve heterogeneidade de variância. Entretanto, os valores de correlações genéticas foram...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Análise bayesiana; Curvas não-lineares de produção; Dados binários correlacionados; Modelo animal; Parâmetros genéticos.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800012
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Bayesian analysis for comparison of nonlinear regression model parameters: an application to ruminal degradability data R. Bras. Zootec.
Rossi,Robson Marcelo; Martins,Elias Nunes; Guedes,Terezinha Aparecida; Jobim,Clóves Cabreira.
This paper shows the Bayesian approach as an alternative to the classical analysis of nonlinear models for ruminal degradation data. The data set was obtained from a Latin square experimental design, established for testing the ruminal degradation of dry matter, crude protein and fiber in neutral detergent of three silages: elephant grass (Pennisetum purpureum Schum) with bacterial inoculant or enzyme-bacterial inoculant and corn silage (Zea mays L.). The incubation times were 0, 2, 6, 12, 24, 48, 72 and 96 hours. The parameter estimates of the equations fitted by both methods showed small differences, but by the Bayesian approach it was possible to compare the estimates correctly, that does not happen with the frequentist methodology because it is much...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian inference; Degradability; Nonlinear models.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000200027
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Effect of soybean hulls on lactation curves and the composition of goat milk R. Bras. Zootec.
Zambom,Maximiliane Alavarse; Alcalde,Claudete Regina; Gomes,Ludmila Couto; Ramos,Carlos Eduardo Crispim de Oliveira; Rossi,Robson Marcelo; Kazama,Daniele Cristina da Silva.
ABSTRACT This study aimed to evaluate the effects of soybean hulls (SBH) as a ground corn replacement (0, 50, and 100% SBH) on the parameters of the lactation curve and on lactation curves and milk composition. Fourteen multiparous Saanen goats were used during their lactation period, from kidding until the drying of their milk on the 228th day of lactation, and were distributed in a completely randomised design. The data was analysed using Bayesian methodology to minimise the effect of the low number of animals and to allow for comparison of the curve parameters estimated by Wood's nonlinear model. The SBH had no effect on the initial milk yield; nevertheless, the SBH reduced the rate of yield until lactation peak and accelerated the declining rate of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian methodology; Dairy goat; Peak production; Persistence of lactation; Wood's nonlinear model.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200167
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Effect of the addition of protected fat from palm oil to the diet of dairy sheep R. Bras. Zootec.
Bianchi,Anderson Elias; Macedo,Vicente de Paulo; Silva,Aleksandro Schafer Da; Silveira,André Luís Finkler da; Hill,João Ari Gualberto; Zortéa,Talyta; Rossi,Robson Marcelo; Batista,Rafael.
ABSTRACT The objective of this study was to evaluate the effect of protected fat from palm oil on body weight and milk production and composition of lactating Lacaune ewes. Four treatments (0, 20, 40, and 60 g kg−1 as fed) of protected fat from palm oil were used to feed nine animals in each group. Isoproteic and isoenergetic diets were formulated and adjusted for each animal after milk weighing. Corn silage was used as roughage on the same proportion of concentrated to feed all animals. Milk samples were collected weekly for chemical analyses up to the seventh week of the lactation period and every other week after that until the end of the lactation period (182 days). Increased levels of protected fat in the diet of lactating ewes resulted in lower body...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical composition; Dairy sheep breed; Milk production.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100609
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Influência das coletas sistemáticas e parciais na seleção de codornas por meio de curvas de probabilidade de postura R. Bras. Zootec.
Rossi,Robson Marcelo; Martins,Elias Nunes.
Neste trabalho, objetivou-se verificar se a seleção é influenciada pela observação parcial da postura de ovos em vez da observação da postura diária total. No primeiro estágio de análises, por meio de um modelo bayesiano, consideraram-se como características analisadas os parâmetros da curva de probabilidade de postura em um modelo de efeitos aleatórios com função de ligação logística. No segundo estágio do procedimento, foram obtidas estimativas de componentes de covariância e parâmetros genéticos. Observou-se superestimação dos parâmetros da curva média de produção da amostra total nas coletas sistemáticas (coletadas 1 vez a cada 14 dias, 1 ou 2 vezes a cada 7 dias) e parciais (nos 15, 30, 45, 60, 75 e 90 dias consecutivos). Para o parâmetro que...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Análise bayesiana; Curvas não-lineares de produção; Dados binários correlacionados; Parâmetros genéticos; Seleção animal.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800011
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Performance and carcass characteristics of lambs fed on diets supplemented with glycerin from biodiesel production R. Bras. Zootec.
Gomes,Marco Antonio Bensimon; Moraes,Gentil Vanini de; Mataveli,Marcela; Macedo,Francisco de Assis Fonseca de; Carneiro,Thais Cristina; Rossi,Robson Marcelo.
This study was carried out to evaluate the influence of diets supplemented with glycerin as an alternative ingredient to corn on the performance and carcass characteristics of Santa Inês confined lambs. The study involved 27 lambs aged 90 days, having an average initial weight of 26.33 ± 0.15 kg. Lambs were randomly distributed into a control group and groups with diets containing 15 and 30% glycerin in the total feed. Diet was formulated with 40% roughage and 60% concentrate. The experimental design was completely randomized, and the production performance and carcass characteristics were analyzed by analysis of variance, and the subjective carcass characteristics, by general linear models. The daily average gain was 0.21, 0.24 and 0.23 kg/day; feeding...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dressing percentage; Feed conversion; Glycerol; Meat quality; Weight gain.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001000022
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Performance and milk quality of cows fed triticale silage or intercropped with oats or legumes Scientia Agricola
Bumbieris Junior,Valter Harry; Emile,Jean-Claude; Jobim,Clóves Cabreira; Rossi,Robson Marcelo; Horst,Egon Henrique; Novak,Sandra.
ABSTRACT: The use of intercropped grass legumes provides a source of sustainable animal production as these vegetables contribute to an increase in forage yield by area, and substitute inorganic nitrogen and other components. The objective of this study was to evaluate the nutritional characteristics of silages and the yield and milk quality of Holstein cows fed triticale silages in monoculture or intercropped with either oats or legumes. The crops for silage production were triticale (TS), triticale in consortium with forage pea (TSP), and triticale in consortium with oats, forage peas and vetches (TSOPV). The silages showed no differences in dry matter content. The highest crude protein (13.06 %) and ethereal extract content was observed in TSOPV, but in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage; Forage pea; Grass; Nutritional value; Vetch.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200402
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Using near infrared spectroscopy to predict metabolizable energy of corn for pigs Scientia Agricola
Ferreira,Silvia Letícia; Vasconcellos,Ricardo Souza; Rossi,Robson Marcelo; Paula,Vinicius Ricardo Cambito de; Fachinello,Marcelise Regina; Huepa,Laura Marcela Díaz; Pozza,Paulo Cesar.
ABSTRACT: The chemical composition of corn is variable and the knowledge of its chemical and energetic composition is required for an accurate formulation of the diet. This study aimed to determine the chemical composition, that is, dry matter (DM), mineral matter (MM), neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE), crude protein (CP), gross energy (GE) and energetic values of different varieties (batches) of corn and validate mathematical models to predict the metabolizable energy values (ME) of corn for pigs using near infrared spectroscopy (NIRS). Corn samples were scanned in the spectrum range between 1,100 and 2,500 nm, the model parameters were estimated by the modified partial least squares (MPLS) method. Ten...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical composition; Prediction equations; Validation; Swine.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600486
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Wilting whole crop black oat with glyphosate for ensiling: effects on nutritive, fermentative, and aerobic stability characteristics R. Bras. Zootec.
Bueno,Antonio Vinicius Iank; Jobim,Clóves Cabreira; Rossi,Robson Marcelo; Gritti,Viviane Carnaval; Leão,Guilherme Fernando Mattos; Tres,Tamara Tais.
ABSTRACT We aimed to evaluate the effects of glyphosate as a chemical desiccant on the nutritional quality, fermentation pattern, and aerobic stability of wilted black oat (Avena strigosa Schreb) silage. Black oat sowing occurred in the first fortnight of May 2013. Desiccant application took place when oat reached milky/dough grain stage (96 days after planting). Glyphosate dosages evaluated were 0, 500, 750, 1000, and 1250 mL ha−1. Three days after desiccation, all treatments were ensiled, and the silos were kept stored for 150 days. A completely randomized design was used, and all statistical procedures were performed by means of Bayesian Inference. Treating herbage prior to ensiling from 500 mL ha−1 glyphosate increased dry matter and organic matter...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerobic deterioration; Dry matter; Pre-drying; Volatile organic compounds.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100302
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