Consulta: creatorFacets:"Lopes,Fernando Brito"
Registros recuperados: 4
Data/hora: 12/06/2024 15:46:25

Cattle farmers: profile and speech content analysis while undergoing training to adopt artificial insemination in Goiás State, Brazil
Provedor de dados: 96
Autores: Gordo,João Maurício Lucas; Silva,Marcelo Corrêa da; Solano,Gianice de Almeida; Lopes,Fernando Brito; Costa,Marcos Fernando Oliveira e; Rocha,Francisco Eduardo de Castro; Fioravanti,Maria Clorinda Soares; Sereno,José Robson Bezerra.
This study was undertaken to verify major issues present in the discourse of cattle farmers when discussing the use of artificial insemination (AI). Seventy-one beef and dairy cattle farmers in the state of Goiás, Brazil, were interviewed using semi-structured questionnaires during AI training courses in 2010 and 2011. Data analyses were done using the classic method of textual speech content analysis, performing the pre-analytical, analytical and inferential stages. The written questions were separated in elementary context units (ECU) and sorted into similar thematic groups. These groups originated categories and subcategories, which were nominated based on an a posteriori criteria. Overall, personal motivation was the main issue characterizing discourse...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal reproduction; Biotechnology; Discourse analysis; Social psychology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000300003

Quantitative genetic analysis for meat tenderness trait in Polled Nellore cattle
Provedor de dados: 124
Autores: Castro,Letícia Mendes de; Magnabosco,Cláudio Ulhôa; Sainz,Roberto Daniel; Faria,Carina Ubirajara de; Lopes,Fernando Brito.
The aim of the present study was to analyze the interrelationships among the variables and also estimate the genetic correlations between tenderness (WBSF), growth (ILW, FLW and ADG) and carcass (BF, RF and LMA) features. Other purpose was to identify individuals who were more likely to be carriers of favorable genes for tenderness. Growth, carcass and tenderness data from 415 Polled Nellore animals was analyzed. Factor analysis and canonical correlations were used to analyze the phenotypic relationships. The covariance components and genetic parameters were estimated using Gibbs Sampling method. Lack of phenotypical correlations between the WBSF and the other traits were observed. The genetic correlations between WBSF and the other evaluated traits were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass; Shear force; Pedigree.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200022

Multivariate approach of inter-relationships among growth, consumption and carcass traits in Nellore cattle
Provedor de dados: 124
Autores: Magnabosco,Cláudio Ulhôa; Lopes,Fernando Brito; Miyagi,Eliane Sayuri; Lôbo,Raysildo Barbosa; Sainz,Roberto Daniel.
The objective of the present study was to analyze the phenotypic inter-relationships between growth, feed intake and carcass traits in polled Nellore cattle, as well as to determine which bulls produced the most efficient progeny. The experiment was conducted in the feedlot of the Guaporé Pecuária (Livestock) Company, OB Brand. The following traits were analyzed: initial live weight (ILW); final live weight (FLW); average daily gain (ADG); dry matter intake (DMI); gain:feed (G:F); residual feed intake (RFI); rib-eye area (REA); rump fat thickness (RF); backfat thickness at the 12th-13th rib (BF); weighted fat score (WF); and intramuscular fat percentage (IMF). Both univariate and multivariate analyses were performed to analyze the inter-relationships...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cluster; Residual feed intake; Multivariate statistic; Weight gain; Zebu.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100020

Tendência genética para características relacionadas à velocidade de crescimento em bovinos Nelore da região norte do Brasil
Provedor de dados: 124
Autores: Lopes,Fernando Brito; Santos,Geneíldes Cristina de Jesus; Marques,Ednira Gleida; Silva,Marcelo Corrêa da; Ferreira,Jorge Luis.
Objetivou-se estimar as (co) variâncias, parâmetros e tendências genéticas para as características dias para ganhar 160 kg (D160) na fase pré-desmama, e dias para ganhar 240 kg (D240) na fase pós-desmama, em bovinos da raça Nelore, criados na região Norte do Brasil. Foram analisados registros de animais criados a pasto na região Norte do Brasil, cedidos pela Associação Brasileira de Criadores de Zebu - ABCZ, e coletados durante os anos de 1997 a 2007. Utilizou-se como efeito fixo os grupos de contemporâneos (rebanho, ano, estação de nascimento e sexo) e idade da vaca ao parto, como covariável. As estimativas de (co)variância foram obtidas utilizando-se o software MTDFREML. As médias observadas para D160 e D240 foram 235 ± 46 dias e 578 ± 171 dias,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gado de corte; Ganho genético; Genética animal; Herdabilidade; Zebu.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000200020