Residual Feed Intake
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Associação entre eficiência alimentar e ganho em acabamento de carcaça de bovinos da raça Nelore
RESUMO Objetivou-se estimar a associação fenotípica entre a eficiência alimentar e o ganho em acabamento de carcaça de touros jovens da raça Nelore. Utilizaram-se informações de 98 touros jovens da raça Nelore, participantes de duas provas de eficiência alimentar que empregaram o sistema de cochos eletrônicos Growsafe®, as quais foram realizadas
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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2. Estimation of genetic parameters for weight traits and Kleiber Index in a Brahman cattle population
ABSTRACT: Interest in improving feed efficiency of cattle has been increasing. The residual feed intake (RFI), the most commonly used measurement of feed efficiency, is expensive and can only be used in a small number of animals. The Kleiber Index has also been proposed to measure RFI. In this study, we estimated genetic parameters for the Kleiber Index aver
Sci. agric. (Piracicaba, Braz.). Publicado em: 30/05/2019
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3. Economic analysis, performance, and feed efficiency in feedlot lambs
ABSTRACT The objective of this study was to evaluate residual feed intake (RFI), residual intake and body weight gain (RIG) and their relationship with other traits of efficiency, performance, and economic analysis of sheep. Lambs (n = 102) were evaluated during 56 days and a herd consisting of 500 ewes was simulated with the mean of dry matter intake (DMI)
R. Bras. Zootec.. Publicado em: 2017-10
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4. Phenotypic association between feed efficiency and feeding behavior, growth and carcass traits in Senepol cattle
ABSTRACT The objective of this study was to evaluate the associations between feed efficiency and feeding behavior, growth and carcass traits in Senepol cattle. A total of 137 animals were evaluated. Of these animals, 36 males were evaluated in a second test, totaling 173 records (initial age of 466±96 days and initial weight of 426±104 kg). Residual feed
R. Bras. Zootec.. Publicado em: 2017-01
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5. Relationship between residual feed intake and enteric methane emission in Nellore cattle
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 methan
R. Bras. Zootec.. Publicado em: 2015-07
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6. Correlations of visual scores, carcass traits, feed efficiency and retail product yield in Nellore cattle
The growing use of visual scores (VS) and ultrasound (US) for carcass evaluation in breeding programs, calls for a knowledge of the relationships between these traits and other relevant characteristics, such as feed efficiency and production of commercial cuts. The objective of this study was to evaluate correlations between body visual scores and carcass tr
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-02
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7. Residual feed intake and hematological and metabolic blood profiles of lle de France lambs
The objectives of this study were to estimate the phenotypic correlations of residual feed intake (RFI) and gross feed efficiency (GFE) with hematological and metabolic blood profiles of lambs and to determine the differences for these traits in animals of different RFI classes. Twenty Ile de France male lambs, 115±8 days of age and 31.3±4.1 kg of body wei
R. Bras. Zootec.. Publicado em: 2013-11
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8. Feedlot performance, feed efficiency and carcass traits in Nellore cattle selected for postweaning weight
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
R. Bras. Zootec.. Publicado em: 2013-02
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9. Protein metabolism, feed energy partitioning, behavior patterns and plasma cortisol in Nellore steers with high and low residual feed intake
The objective was to evaluate protein turnover, nitrogen balance, feed energy partitioning, behavior patterns and plasma cortisol in Nellore (B. indicus) cattle with high and low residual feed intake (RFI = actual minus expected dry matter intake). Seventy-two Nellore steers (16 to 21 months-old, 334±19 kg initial body weight) were fed a feedlot diet for 70
R. Bras. Zootec.. Publicado em: 2013-01
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10. Relações entre eficiência alimentar, características de carcaça e qualidade de carne de novilhos Nelore confinados / Feed efficiency and its relationships with profitability, carcass characteristics and meat quality of Nellore steers
Although Brazil has the largest commercial beef cattle herd of the world, research on genetic improvement of beef cattle for feed efficiency is incipient. Some countries have invested in studies to identify feed efficient animals and to find molecular markers associated with this characteristic. Genetic selection of efficient animals can resulting lower cost
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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11. Residual feed intake and its effect on carcass and meat characteristics of feedlot Zebu cattle
The objective of this study was to evaluate the residual feed intake (RFI) and its relation with performance, carcass and meat characteristics of Zebu animals. A total of 40 Zebu steers with initial age of 18 months and initial live weight of 350 kg were confined in feedlot for 112 days. The average daily gain (ADG) and dry matter intake (DMI) were obtained
Revista Brasileira de Zootecnia. Publicado em: 2012-06
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12. Eficiência alimentar e suas associações com o lucro, características de carcaça e qualidade de carne de bovinos Nelore / Feed efficiency and relationships with profitability, carcass characteristics and meat quality of Nellore
O Brasil, com o maior rebanho comercial do mundo, só agora está desenvolvendo pesquisas sobre genética da eficiência alimentar. Além disso, é impossível ignorar a pressão nacional e internacional para uma indústria mais sustentável de produção de carne. Países como Austrália e Canadá, já desenvolveram programas para identificar animais mais e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2011