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| Registros recuperados: 1.268 | |
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| Rauber,RH; Flôres,ML; Pereira,CE; Grigulo,M. |
| The present work was carried out to compare Infectious Bronchitis Virus (IBV) antibody titers in serum and egg yolk samples from laying hens. Sixty paired blood and egg samples were collected from laying hens of two farms. Serum samples were frozen, while egg yolk samples were diluted (1:500) before freezing. Serum and yolk samples were tested for the presence of IBV antibodies by indirect ELISA (commercial kit) and titers were compared by a correlation test (alpha=0.05). There was a high correlation (r=0.62) between the two kinds of samples, which means that titers of IBV antibodies in the egg yolk and in serum samples are quite the same. Considering that blood collection causes deep stress that leads to economic losses, and since eggs are collected daily... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibody; Egg yolk; ELISA; Infectious bronchitis; Serology. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000200008 |
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| Guo,YL; Ma,SM; Du,JJ; Chen,JL. |
| ABSTRACT An experiment was conducted to investigate the effects of light intensity on growth, anti-stress ability, and immune function of yellow feathered broilers. A total of 480 one-day-old male Lingnan yellow feathered broilers were randomly allocated to 4 treatments based on light intensity (1, 5, 20 and 80 lx) with 8 replicates of 15 chicks each. The experiment lasted for 63 days. Compared with those under high light intensity, broilers exposed to low light intensity had higher (p<0.05) total antioxidant capacity (T-AOC), glutathione peroxidase (GSH-Px), a-Naphthylacetate esterase (ANAE+), antibody titer, but lower (p<0.05) malonaldehyde (MDA) levels and heterophil/lymphocyte ratio (H/L). There was a linear effect for T-AOC(p=0.002),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anti-stress ability; Growth; Immune function; Light intensity; Yellow feathered broilers.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100079 |
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| Amaral,LA1; Schocken,DBL; Lucas Jr.,J. |
| A digestão anaeróbia pode auxiliar na redução de patógenos e poluição ambiental pela redução dos sólidos e microrganismos de presença indesejável nos efluentes. No presente trabalho objetivou-se a avaliação da redução de microorganismos indicadores de contaminação fecal através do processo de biodigestão anaeróbica de dejetos de aves de postura em biodigestores contínuos, operados em diferentes tempos de retenção hidráulica (TRH): 40, 30, 25, 20 e 15 dias, e biodigestores de batelada com e sem a utilização de inóculo. Foi observada nos dois tipos de biodigestores uma redução acima de 99,0% para os coliformes totais e fecais, mostrando a eficiência do processo. Os resultados obtidos no presente trabalho mostram que o processo de biodigestão anaeróbia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dejetos avícolas; Biodigestão anaeróbia; Poluição fecal; Saneamento rural. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2000000100004 |
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| Sohaib,M; Zafar,MS; Arshad,MS; Nauman,K; Malhi,IY. |
| ABSTRACT The adulteration of dead chicken meat with halal meat is a concern in Pakistan that can harm safety of meat as well as religious beliefs of the Muslims. Accordingly, the present study was conducted to evaluate slaughtering methods (Islamic and decapitation) with dead chicken meat on composition, quality and safety attributes. Purposely, (n=24) birds were slaughtered and (n=12) dead birds samples were collected and subjected to proximate, mineral and quality analysis including pH, color (L*, a*, b*), cooking loss, texture, as well as thiobarbituric acid reactive substances (TBARS), peroxide value (PV), haem and non-haem iron. The results indicated ash content, minerals and oxidation parameters including TBARS, PV affected significantly (p<0.05).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Food Safety; Ritual Slaughter; Dead bird meat; Oxidative stability. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200307 |
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| Pelicia,K; Garcia,EA; Santos,TA; Santos,GC; Vieira Filho,JA; Silva,AP; Moreira,J; Rabello,CBV; Garcia,RG. |
| ABSTRACT This study aimed at evaluating beak-trimming methods and intensities on the performance, beak length and uniformity, and egg parameters of commercial layers. During the rearing period, birds were distributed in randomized blocks, with a 2x3 factorial design + two treatments, consisting of beak trimming with infrared (IR) radiation (moderate or severe); three IR intensities (low: 42 nm, intermediate: 46 nm, or high: 52 nm); and two control hot blade (HB) beak trimming treatments (moderate or severe) with eight treatments and five replicates of 21 chicks each, totaling 840 birds. During the growing phase (second experiment) the factorial design was modified to 2 x 3 x 2 + 4, comprising two IR beak-trimming intensities (moderate or severe); three IR... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative beak-trimming methods; Beak-trimming; Infrared radiation; Lohmann White layers. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100300 |
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| Martins,Nelson Rodrigo da Silva. |
| Avian influenza (AI) is considered an exotic disease in the Brazilian poultry industry, according to the National Avian Health Program (PNSA), with permanent monitoring of domestic, exotic and native avian species. Brazil presents privileged environmental conditions of reduced risk. In addition, all commercial poultry and conservation holdings are registered in state or national inventories and geographically located (GPS) for health control. Poultry health standards are adopted for the conformity to the international market, mostly for the intensified poultry destined for exportation, but also for companion exotic and native conservation facilities. Guidelines for monitoring and the diagnosis of AI are published by the PNSA and follow the standards... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avian influenza; Epidemics; Global health. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200001 |
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| Silva,FHA; Faria,DE; Torres,KAA; Faria Filho,DE; Coelho,AAD; Savino,VJM. |
| This experiment aimed at evaluating the influence of different heating times of settable eggs of Cobb 500® broiler breeders before submitting them to different storage periods on egg weight loss, embryo mortality, and hatchability. A total number of 1,980 eggs were distributed in a completely randomized experimental design with a 3 x 3 factorial arrangement, comprising nine treatments with 22 replicates of 10 eggs each. The following factors were analyzed: pre-storage heating periods (0, 6, 12 hours at 36.92°C) and storage periods (4, 9, 14 days at 12.06°C). After storage, eggs were incubated under usual conditions, and were transferred to the hatcher at 442 hours of incubation. Eggs were weighed before heating, incubation, and transference to determine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler breeders; Egg weight loss; Embryo development; Embryo mortality; Hatch. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000100003 |
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| Takahashi,SE; Mendes,AA; Saldanha,ESPB; Pizzolante,CC; Pelícia,K; Quinteiro,RR; Komiyama,CM; Garcia,RG; Almeida Paz,ICL. |
| Two trials were carried out in the present study. Trial I evaluated the performance, carcass yield and breast meat quality, whereas Trial II evaluated the efficacy of utilizing prebiotics + probiotics on the control of Salmonella spp incidence in the carcasses of free-range broilers. In Trial I, 688 one-day-old male chicks of the Naked Neck Label Rouge strain were used, distributed in a randomized block design arranged according to a 2 x 2 factorial: control diet or diet supplemented with probiotics and prebiotics; and two rearing systems (confined or with access to paddocks - 3m²/bird), using four replicates with 35 birds each. The birds were reared until 84 days of age following the recommendations of management and nutrition for free-range strains, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass yield; Free-range broilers; Performance; Prebiotics and probiotics; Salmonella spp. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000300003 |
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| Zhang,T; Du,W; Lu,H; Wang,L. |
| ABSTRACT The black-bone chicken has special economic value in Chinese poultry breeds, which also are valued for the medicinal properties of their meat in traditional Chinese medicine. In order to protect the genetic resources of native black-bone chicken breeds, we analyzed the genetic diversity and matrilineal components of 64 mtDNA D-loop partial sequences from three native black-bone chicken breeds, together with reported 596 black-bone chicken mtDNA sequences from China, Japan, and Korea. A total of 108 haplotypes were observed from 73 variable sites. These domestic chicken mtDNA sequences could be assigned into seven clades (A-G). The results indicated that 71.97% of the black-bone haplotypes were related to the reference sequence that may originate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chinese Black-bone Chicken; MtDNA; D-loop region; Haplotype; Maternal origin. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300565 |
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| Santos,MJB; Pandorfi,H; Rabello,CBV; Silva,EP; Torres,TR; Santos,PA; Morril,WB; Duarte,NM. |
| An experiment was carried out to evaluate the effect of environmental enrichment in a free-range chicken production system on live performance as a function of microclimate, physiological parameters, and performance parameters. Four production modules were divided into four pens with 10 birds each, totaling 60 birds. The following treatments were applied: access to a paddock (TEST), access to a paddock with perches (PER), access to a paddock with artificial shade (SHA), and access to the paddock with perches and artificial shade (PESH). The PESH production module presented the best globe temperature (Tbg,ºC) and enthalpy (h, kJ/kg), and thereby, the best thermal environmental conditions, which ensured the longest permanence time of the birds in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal behavior; Physiological parameters; Poultry production; Thermal comfort. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100003 |
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| Kheiri,F; Landy,N. |
| ABSTRACT This experiment was conducted to examine the effects of dietary L-arginine (Arg) supplementation on growth performance, intestinal morphology, serum biochemical and hematological parameters in meat-type quails. A total of one hundred and sixty 7-d-old male quail chicks were weighed and allocated to four treatment groups of four replicates, with 10 chicks/replicate. Four groups of quail chicks were fed basal diet containing 12.44 g lysine (Lys)/kg of diet (control), basal diet supplemented with 0.4, 1.21 and 1.84 g Arg/kg of diet (for Arg to Lys ratios of 100, 103, 109 and 114) for 28 days. The birds were fed diets from 7 to 38 d of age. Final body weight and feed:gain tended to improve by increasing Arg:Lys ratio to 109. Relative weight of spleen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arginine; Hematology; Meat-type quail; Performance; Serum biochemistry. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000300308 |
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| Wu,L; Huang,X; Shi,K; Tan,R. |
| Lutein supplements are often used to pigment and enrich layer chicken eggs. This experiment was conduced to compare the bioavailability of free and esterified lutein, by depletion method. Forty chickens were randomly divided into two groups. After 2 weeks of washout period, when all birds were fed the same low lutein basal diet, the two groups were fed for another 2 weeks with diets supplemented with free lutein or esterified lutein. Two experimental diets were supplemented with the same amount of 15 mg lutein/kg. On day 0 (baseline) and days 3, 7, and 14, birds fasting morning plasma samples were collected and stored for lutein analysis by high performance liquid chromatography method (HPLC). Results showed that: 1) Plasma lutein concentration increased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioavailability; Depletion method; Free lutein; Layer hens; Lutein ester. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200004 |
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| Nääs,IA; Miragliotta,MY; Baracho,MS. |
| O setor econômico de produção de matrizes pesadas emprega um grande número de pessoas que permanecem cerca de 44 horas semanais dentro tanto das granjas de recria e produção, como nas salas adjacentes à câmara incubatória. O trabalho levantou os dados de níveis de ruídos em um sistema de produção de matrizes pesadas e de ovos férteis, nos galpões de recria do tipo Dark House, e produção de ovos nas salas de vacinação de pintinhos e de acondicionamento de ovos férteis, em dois dias consecutivos, por um período de 8 horas, durante as horas em que os trabalhadores se encontravam dentro dos locais. Os registros de nível de ruídos foram efetuados utilizando-se um equipamento nível sonoro marca Lutron SL 4001. Foram coletados os dados médios de nível normal e de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nível de ruído; Incubatório; Galpões; Aviário; Recria; Produção. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000200003 |
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| Schmidt,GS; Figueiredo,EAP. |
| This experiment aimed at evaluating the effect of genetic selection on embryo development of two male broiler lines (LL and LLc). LL line was selected for eight generations for growth, carcass, and reproduction traits. The LLc line was derived from LL line in 1985, and kept under a random mating system with no selection. Fertile eggs were collected and individually weighed for four periods of five consecutive days, with two-week intervals. For every period, a total of 960 eggs/line were identified and separated in four groups of 240 eggs, and then stored for subsequent incubation. At 9 (P9), 11 (P11), 13 (P13), 15 (P15), 17 (P17) and 21 (P21) days of incubation, eggs and embryos were weighed (EmW). Egg weight (EgW) was similar between the two lines. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Correlation; Egg weight; Embryo weight; Genetic gain; Meat lines. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100003 |
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| Araújo,LF; Junqueira,OM; Araújo,CSS; Laurentiz,AC; Almeida,JG; Serrano,PP. |
| Dois experimentos foram realizados com o objetivo de avaliar o desempenho de frangos de corte no período de 1 a 21 dias alimentados com dietas formuladas nos conceitos de proteína bruta e proteína ideal. No primeiro experimento, foram utilizados 400 pintos machos de um dia de idade da linhagem Cobb, distribuídos em delineamento inteiramente casualizado, com 2 tratamentos (proteína total e proteína ideal) e 5 repetições de 40 aves cada. No segundo experimento, foram utilizados 800 pintos, 400 machos e 400 fêmeas, em arranjo fatorial 2x2 (2 formulações - proteína bruta e proteína ideal e 2 sexos) com 4 tratamentos e 5 repetições de 40 aves cada. As dietas foram formuladas atendendo às exigências estabelecidas pela DEGUSSA (1997). Aos 21 dias, foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desempenho; Frangos de corte; Programa de alimentação; Proteína ideal. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000200004 |
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| Moura,CP; Leite,SCB; Nogueira,APA; Farias,MRS; Abreu,CG; Sena,TL; Freitas,ER. |
| ABSTRACT Dietary inclusion of lipid sources has been one of the methods adopted by nutritionists aiming at better energy balancing. However, alternative energy feedstuffs have been sought in an attempt to reduce production costs. In this regard, lipid sources that can replace conventional ones, such as beef tallow, cottonseed oil, and sunflower oil have been investigated. The objective of this study was to examine the effects of different lipid sources on the performance, egg quality, biometrics of digestive organs, and bone quality of white-egg commercial layers in the first production cycle. A total of 216 Hy-Line White layers at 70 weeks of age, weighing 1.701 ± 0.103 kg, were used in a completely randomized design with four treatments and six... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy feedstuff; Cottonseed oil; Laying; Chicken fat. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000300309 |
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| Jacob,FG; Baracho,MS; Nääs,IA; Lima,NSD; Salgado,DD; Souza,R. |
| ABSTRACT The most common lesions observed in commercial broiler farms are hock burns and pododermatitis, defined as necrotic lesions on the plantar surface of the footpads and in the hock of growing broilers, causing pain and compromising broiler welfare. The present study aimed at identifying the risks of hock burns and pododermatitis in broilers reared under commercial conditions on new or reused litter. Twenty-four 40-d-old broilers reared in two houses in a commercial broiler farm. The plantar surface of the footpads and the hocks of broiler were recorded using infrared thermal images. The incidence of hock burns in broilers reared on new litter was 0.72 times lower than those on reused litter. Broilers reared on new litter presented lower risk (0.75,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feet lesion; Litter; Poultry production. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300357 |
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| Araújo,LF; Junqueira,OM; Araújo,CSS; Artoni,SMB; Faria Filho,DE. |
| Dois experimentos foram realizados com o objetivo de avaliar diferentes critérios de formulação de rações, baseados em aminoácidos totais e digestíveis, para frangos de corte no período de 1 a 21 dias de idade. As dietas foram formuladas para atender às exigências de metionina, metionina+cistina, lisina e treonina. No primeiro experimento, foram utilizados 800 pintos machos, Hubbard, distribuídos em delineamento inteiramente casualizado com 4 critérios de formulação, para atender às exigências em aminoácidos totais - NRC (1994), Rostagno et al. (1992), Degussa (1997) e AEC (1993), com 4 repetições de 50 aves. No segundo experimento, foram utilizados 600 pintos machos, Cobb, distribuídos em delineamento inteiramente casualizado com 3 critérios de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aminoácidos; Critérios de formulação; Desempenho; Frangos de corte. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000300003 |
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| Registros recuperados: 1.268 | |
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