Consulta: creatorFacets:"Bonilha,Sarah Figueiredo Martins"
Registros recuperados: 10
Data/hora: 29/05/2024 06:06:50

Relationship between residual feed intake and enteric methane emission in Nellore cattle
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Mercadante,Maria Eugênia Zerlotti; Caliman,Ana Paula de Melo; Canesin,Roberta Carrilho; Bonilha,Sarah Figueiredo Martins; Berndt,Alexandre; Frighetto,Rosa Toyoko Shiraishi; Magnani,Elaine; Branco,Renata Helena.
Feed intake and average daily gain (ADG) in Nellore cattle were determined to calculate residual feed intake in two performance tests: first during the growth phase (RFIgrowth) and then during a measurement of the methane emission phase (RFImet). During the RFIgrowth test, 62 males and 56 females were classified as low-, medium-, and high-RFI. Enteric methane emission was measured in 46 animals; 23 males used for RFImet measurement plus 23 females (22 low-RFIgrowth and 24 high-RFIgrowth). Diet consisted of Brachiaria brizantha cv. Marandu hay (445 g/kg DM) and concentrate (555 g/kg DM). During the RFIgrowth and RFImet phases, DMI was lower in the animals with low RFI, with no difference in ADG. Residual feed intake was -0.359 and 0.367 kg DM/d for low- and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Enteric methane production; Feed efficiency; Performance; Sulfur hexafluoride.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700255

Test post-weaning duration for performance, feed intake and feed efficiency in Nellore cattle
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Castilhos,André Michel de; Branco,Renata Helena; Razook,Alexander George; Bonilha,Sarah Figueiredo Martins; Mercadante,Maria Eugênia Zerlotti; Figueiredo,Leopoldo Andrade de.
This study was conducted to determine optimum test duration for measuring performance, feed intake and feed efficiency. Sixty young Nellore bulls were submitted to feeding performance test and fed in individual pens to determine feed intake and performance over 112 days. Body weight was determined every 28 days, after fasting of water and feed for 16 hours. Changes in variance, relative variance and Pearson and Spearman correlations among data from shortened test periods (28, 56 and 84 days) and full test period (112 days) were used to determine optimum test duration. Test duration for average daily gain, dry matter intake, feed:gain ratio and residual feed intake could be shortened to 84, 28, 84 and 84 days, respectively, without reducing significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Feeding performance test; Residual feed intake.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200010

Development and evaluation of models to estimate body chemical composition of young Nellore bulls
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Silva,Luiz Henrique Oliveira; Bonilha,Sarah Figueiredo Martins; Branco,Renata Helena; Cyrillo,Joslaine Noely dos Santos Gonçalves; Mercadante,Maria Eugênia Zerlotti.
ABSTRACT The objective of this study was to develop accurate regression equations to predict body composition of Nellore cattle using chemical composition of the 9th, 10th, and 11th ribs and to evaluate the models proposed by analyzing mean and linear bias. Sixty-seven Nellore bulls were slaughtered and slaughter body weight (SBW), hot carcass weight (HCW), and 9th-, 10th-, and 11th-rib-cut weight (RCW) were measured. Empty body composition was obtained after grinding, homogenizing, sampling, chemical analysis, and pooling (blood, skin, head + feet, viscera, and carcass). Chemical components were determined in rib cut, carcass, and empty body: protein (RCP, HCP, and EBP), fat (RCF, HCF, and EBF), ash (RCA, HCA, and EBA), and water (RCWt, HCWt, and EBWt)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Feedlot; Indirect determination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200156

Efeito da seleção para peso pós-desmame sobre a composição corporal de bovinos
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Bonilha,Sarah Figueiredo Martins; Packer,Irineu Umberto; Figueiredo,Leopoldo Andrade de; Resende,Flávio Dutra de; Alleoni,Guilherme Fernando; Razook,Alexander George.
Foi determinada a composição química corporal no peso de corpo vazio de 56 bovinos machos não-castrados selecionados ou não para peso aos 378 dias (P378), nascidos em 1999. Utilizaram-se animais dos grupos genéticos Nelore Seleção (NeS), Nelore Controle (NeC) e Caracu Seleção (Ca), distribuídos aleatoriamente em três grupos experimentais: AI - grupo de abate inicial; AR - grupo de alimentação restrita; e AL - grupo de alimentação ad libitum. No grupo de abate inicial, foram utilizados quatro animais por grupo genético e, nas categorias AR e AL, havia oito animais NeS e Ca e seis NeC. Após o período de adaptação, os animais do grupo AI foram abatidos e os demais foram submetidos ao ensaio de alimentação. O período experimental foi determinado pelo tempo de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caracu; Composição corporal; Nelore; Seleção.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007000600009

Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Pinheiro,Tiago Roque; Mercadante,Maria Eugênia Zerlotti; Albuquerque,Lucia Galvão de; Bonilha,Sarah Figueiredo Martins; Monteiro,Fábio Morato.
The objectives of this study were to estimate heritabilities and genetic and phenotypic correlations between carcass traits measured by ultrasound and other economically important traits generally used as selection criteria in beef cattle and to estimate the genetic changes in the carcass traits as a result of selection for post-yearling weight. Carcass traits measured by ultrasound at two ages (12 and 18 months) and the correlation of these traits with weight, hip height and body condition score of males (yearling) and females (post-yearling) were analyzed. Multi-trait analysis was performed using the restricted maximum likelihood method under an animal model. To demonstrate the effect of selection for growth, phenotypic and expected breeding value means...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass traits; Correlated responses; Genetic correlation; Ultrasound; Zebu cattle.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600016

Feedlot performance, feed efficiency and carcass traits in Nellore cattle selected for postweaning weight
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Lucila Sobrinho,Tatiana; Bonilha,Sarah Figueiredo Martins; Gonçalves,Heraldo Cesar; Castilhos,André Michel de; Magnani,Elaine; Razook,Alexander George; Branco,Renata Helena.
The objective of this study was to evaluate the correlated responses to selection for growth in feed efficiency and carcass traits of Nellore animals. A total of 121 animals of the Nellore control (NeC) and selection herds were subjected to performance testing and classified regarding residual feed intake (RFI). Sixty-seven of these animals were selected and finished until reaching 4 mm of subcutaneous fat thickness between the 12th and 13th ribs. The animals were slaughtered at a mean age of 541 days and mean live weight of 423 kg for NeS and of 363 kg for NeC, and carcass traits were measured. Animals in NeS presented higher initial and slaughter weights, dry matter intake, hot and cold carcass weight, weight of retail cuts, and carcass yield than NeC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Carcass yield; Meat cuts; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000200007

Feed efficiency of Nellore cattle selected for postweaning weight
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Castilhos,André Michel de; Branco,Renata Helena; Corvino,Tatiana Lucila Sobrinho; Razook,Alexander George; Bonilha,Sarah Figueiredo Martins; Figueiredo,Leopoldo Andrade de.
Two Nellore herds were compared, one selected for greater postweaning weight and the other, control, selected for average postweaning weight, to evaluate the effects of 29 years of selection on feed efficiency. Sixty Nellore males (41 selected and 19 control) averaging 205 kg and 267 days of age were evaluated in individual pens during performance test. Performance and dry matter intake were used to determine the following feed efficiency traits: feed conversion; residual feed intake; residual gain; partial growth efficiency; relative growth rate and Kleiber ratio. After the 112-day experimental period, control animals showed lower body weight when compared to selected animals, however, they did not differ for dry matter intake (% of body weight), rib-eye...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Feed conversion; Residual feed intake; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001100023

Estimação da composição química do corpo vazio de animais Nelore e Caracu a partir das composições química e física do corte da 9ª-10ª-11ª costelas
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Bonilha,Sarah Figueiredo Martins; Packer,Irineu Umberto; Razook,Alexander George; Figueiredo,Leopoldo Andrade de; Alleoni,Guilherme Fernando; Resende,Flávio Dutra de.
Foram desenvolvidas equações para estimar a composição química corporal de bovinos de três grupos genéticos (Caracu, CaS; Nelore seleção, NeS; e Nelore controle, NeC) a partir das composições química e física do corte da 9ª-10ª-11ª costelas. Utilizaram-se 56 machos não-castrados (20 CaS, 20 NeS e 16 NeC) abatidos aos 20-24 meses de idade. A composição química em água, proteína, extrato etéreo e minerais foi determinada no corte das costelas e em amostras obtidas após moagem completa e homogeneização de todos os tecidos corporais, separados em sangue, couro, cabeça + patas, vísceras e carcaça. Os componentes físicos músculo, gordura e ossos foram também separados no corte das costelas. As melhores estimativas dos componentes do corpo vazio foram obtidas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovinos; Composição corporal; Corte das costelas; Determinação indireta.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001200019

Efeitos da seleção para peso pós-desmame sobre características de carcaça e rendimento de cortes cárneos comerciais de bovinos
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Bonilha,Sarah Figueiredo Martins; Packer,Irineu Umberto; Figueiredo,Leopoldo Andrade de; Alleoni,Guilherme Fernando; Resende,Flávio Dutra de; Razook,Alexander George.
Foram avaliados os efeitos da seleção para peso pós-desmame sobre características de carcaça e rendimento de cortes cárneos comerciais de 44 bovinos machos não-castrados selecionados ou não para peso aos 378 dias, nascidos em 1999, Foram utilizados animais dos grupos genéticos Nelore Seleção (NeS), Nelore Controle (NeC) e Caracu Seleção (Ca). Os animais foram distribuídos aleatoriamente em duas categorias experimentais: grupo de alimentação restrita (AR) e grupo de alimentação ad libitum (AL). Em ambas as categorias, foram alocados oito animais dos grupos genéticos NeS e Ca e seis animais do grupo NeC. O período experimental foi determinado pelo tempo de acabamento dos animais, ou seja, quando atingiram, no mínimo, 4 mm de espessura de gordura subcutânea,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caracu; Carcaça; Maciez da carne; Nelore; Seleção.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007000600008

Body chemical composition, tissue deposition rates and gain composition of young Nellore cattle selected for postweaning weight
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Bonilha,Eduardo Figueiredo Martins; Branco,Renata Helena; Bonilha,Sarah Figueiredo Martins; Araújo,Fabiana Lana de; Cyrillo,Joslaine Noely dos Santos Gonçalves; Magnani,Elaine.
Empty body and carcass chemical composition were determined in 67 Nellore bulls from Selection Nellore (NeS) and Control Nellore (NeC) herds of an animal breeding program for growth, slaughtered at 570 days of average age, after 100 days of feedlot. Selection Nellore animals had, respectively, 360 and 430 kg of initial and slaughter body weight, and NeC animals had 318 and 373 kg for the same traits. Animals were slaughtered and empty body composition was determined by chemical analysis of the components blood, hide, head and feet, viscera and carcass. Tissue deposition rates and gain chemical composition were also determined based on gains estimated by comparative slaughter technique. Significant differences were detected between NeS and NeC animals for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos indicus; Efficiency; Fat; Protein; Selection; Weight gain.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000400175