Feathering
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Digestible Methionine + Cysteine-to-Lysine Ideal Ratio for Meat-Type Quails at Initial Phase
ABSTRACT This trial was performed to determine the ideal ratio of digestible methionine + cysteine (Met/Lys) with digestible lysine for meat-type quails from 1 to 14 days of age. A total of six hundred thirty, one-day-old, not sexed meat type quails were randomly assigned to six groups of treatments, each one with seven replicates and fifteen quails per expe
Rev. Bras. Cienc. Avic.. Publicado em: 2017-01
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2. EFFECT OF LITTER SUBSTRATES ON THE PERFORMANCE, CARCASS TRAITS, AND ENVIRONMENTAL COMFORT OF RED-WINGED TINAMOU (RHYNCHOTUS RUFESCENS)
ABSTRACT The study aimed at evaluating the effect of litter substrates on the performance, carcass traits, and environmental comfort of red-winged tinamou (Rhynchotus rufescens). In this experiment, 160 birds, with 100 and 300 days of age, were housed into 20 pens, and distributed according to a completely randomized experimental design into five treatments
Rev. Bras. Cienc. Avic.. Publicado em: 2016-09
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3. Molecular Diagnosis of Beak and Feather Disease in Native Brazilian Psittacines
ABSTRACT The incidence of the psittacine beak and feather disease virus (BFDV) was investigated in Brazilian native parrots with normal feathering arriving at rescue and triage centers for wild animals (CETAS, IBAMA) in the state of Minas Gerais, Brazil. BFDV DNA was investigated by previously described PCR technique for the partial amplification of BFDV ORF
Rev. Bras. Cienc. Avic.. Publicado em: 2015-12
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4. Efficacy and Metabolizable Energy Equivalence of an α-Amylase-β-Glucanase Complex for Broilers
A trial was conducted to evaluate the effects of adding an exogenous α-amylase-β-glucanase complex produced from Bacillus amyloliquefaciens on the growth performance, carcass yield, and relative AME bioequivalence in broilers fed corn-soy diets from 1 to 40 d of age. One thousand seven hundred and fifty one-day-old Cobb x Cobb 500 slow-feathering male broi
Rev. Bras. Cienc. Avic.. Publicado em: 2015-06
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5. Incidência de vírus em videiras no Nordeste brasileiro e caracterização molecular parcial de isolados virais locais
Os objetivos deste trabalho foram identificar as espécies virais presentes em vinhedos comerciais de duas regiões do Nordeste do Brasil e realizar a caracterização molecular parcial de isolados de três espécies virais. A diagnose foi realizada por meio de RT-PCR em tempo real para a detecção de Grapevine rupestris stem pitting-associated virus (GRSPa
Cienc. Rural. Publicado em: 2015-03
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6. Litter materials and the incidence of carcass lesions in broilers chickens
The aim of this study was to evaluate the effects of different litter materials on litter compaction, broiler feathering and the incidence of carcass lesions. In the experiment, 3240 one-day-old Ross® chicks were selected by sex and distributed according to a completely randomized experimental design in a 2 x 6 factorial arrangement (two sex and six litter
Revista Brasileira de Ciência Avícola. Publicado em: 2012-03
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7. Methionine sources do not affect performance and carcass yield of broilers fed vegetable diets and submitted to cyclic heat stress
The supplementation of vegetal diets with L-methionine (100% molar), methionine hydroxyl analogue (HMB) (88% molar) or DLmethionine (99% molar) was compared as to the performance of broilers allocated in cages and submitted to cyclic heat stress (CHS). The trial was carried out from 21 to 42 days of age. Two levels of synthetic methionine were supplemented f
Publicado em: 2010
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8. Evaluation of strain, dietary energy level and stocking density on broiler feathering
This study evaluated the effects of strain, stocking density and dietary energy level on the feathering of broiler chickens. Four trials were carried out between September 2000 and April 2002. There were 10,685 broiler chicks from the strains Ross 308, Cobb 500, Hybro PG, Hubbard, MPK, and Isa Vedette. The bids were reared at stocking densities varying betwe
Revista Brasileira de Ciência Avícola. Publicado em: 2006-03
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9. Interação genótipo-ambiente e análise da variabilidade no melhoramento genético de linhagens de avós de frangos de corte / Genotype -environment interaction and the analysis of variability in genetic improvement of broilers parentals lines of breeding.
The genetic improvement of aviary lines of breeding has contributed to the increasing efficiency of Brazilian poultry. Nevertheless, for the selection of superior genotypes in improvement programs, we must evaluate the existent variability, associated to the creation of birds in different environments. In this sense, with this research, we aimed at evaluatin
Publicado em: 2006
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10. Methionine sources do not affect performance and carcass yield of broilers fed vegetable diets and aubmitted to cyclic heat stress
The supplementation of vegetal diets with L-methionine (100% molar), methionine hydroxyl analogue (HMB) (88% molar) or DL-methionine (99% molar) was compared as to the performance of broilers allocated in cages and submitted to cyclic heat stress (CHS). The trial was carried out from 21 to 42 days of age. Two levels of synthetic methionine were supplemented
Revista Brasileira de Ciência Avícola. Publicado em: 2005-09
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11. Polymorphism analysis of the hsp70 stress gene in Broiler chickens (Gallus gallus) of different breeds
The promoter region and the beginning of the coding region of the hsp70 stress gene were analysed in broiler chickens of a commercial breed (Hubbard-Pettersen), a breed selected for weight gain (PP1) and a non-selected breed (naked-neck Label Rouge). The naked neck gene (Naked neck, Na), which reduces feathering in birds and is thus related to heat resistanc
Genetics and Molecular Biology. Publicado em: 2003
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12. pathogenesis of the henny feathering trait in the Sebright bantam chicken. Increased conversion of androgen to estrogen in skin.
In female chickens of all breeds development of female feathering pattern is mediated by estrogens, whereas normal males and castrated chickens of both sexes develop male feathering. Male chickens carrying the henny feathering trait (such as the Sebright bantam and golden Campine) develop a female feathering pattern but otherwise virilize normally. To examin