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Classification of coefficients of variation in experiments with commercial layers Rev. Bras. Ciênc. Avic.
Faria Filho,DE; Dias,AN; Veloso,ALC; Bueno,CFD; Couto,FAP; Matos Júnior,JB; Barreto,KZO; Rodrigues,PA; Carneiro,WA.
This study aimed at determining a specific classification of coefficients of variation in experiments with commercial layers. Coefficients of variation were collected from papers published in Brazilian journals between 2000 and 2009 for performance, internal egg quality, and eggshell quality parameters. The coefficients of variation of each parameter were classified as low, intermediate, high, and very high according to the ratio between the median and the pseudo-sigma. It was concluded that the parameters used in experiments with commercial layers have a specific classification of coefficients of variation, and that this must be considered to evaluate experimental accuracy.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental accuracy; Experimental statistics; Gallus domesticus; Poultry.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400006
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Crude protein and metabolizable energy levels for layers reared in hot climates Rev. Bras. Ciênc. Avic.
Almeida,VR; Dias,AN; Bueno,CFD; Couto,FAP; Rodrigues,PA; Nogueira,WCL; Faria Filho,DE.
The objective of the present study was to evaluate the effects of different dietary crude protein (CP) and metabolizable energy (ME) levels on the performance, internal and external egg quality, and cloacal temperature of commercial layers reared in hot climate. In this trial, 100 commercial Hy-Line W-36 layers between 20 and 32 weeks of age were distributed according to a completely randomized experimental design with a 2 x 2 factorial arrangement, consisting of two CP levels (15 e 18%) and two ME contents (2700 and 3100 kcal/kg) with five replicates per treatment and 10 birds per replicate. Performance (feed intake, egg production, egg mass, and feed conversion ratio), internal (Haugh units and albumen and yolk percentage) and external (eggshell % and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thermal homeostasis; Nutrition; Environmental temperature; Cloacal temperature.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300007
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Detoxified Castor Seed Cake for Broilers Rev. Bras. Ciênc. Avic.
Faria Filho,DE; Dias,AN; Carneiro,WA; Bueno,CFD; Matos Júnior,JB; Veloso,ALC; Rodrigues,PA.
Abstract The objective of the present study was to evaluate the effect of the dietary detoxified castor seed cake (DCC) inclusion on broiler performance and carcass traits. Two hundred and fifty Cobb-500(r) broilers were distributed according to a completely randomized experimental design consisting of five treatments (dietary inclusion of 0.0, 2.5, 5.0, 7.5, and 10.0% DCC) with five replicates of 10 birds each (five males and five females). Feed intake (FI), body weight gain (WG), and feed conversion ratio (FCR) were evaluated from one to 40 days of age. Carcass yield and the yields of the breast, leg (drumstick+thighs), and wings were determined when broilers were 40 days old. Live performance parameters were influenced by DCC dietary inclusion, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broilers; Performance; Carcass yield; Ricinuscommunis L.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000100069
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Firewood Ash as Calcium Source in the Initial Diet of Broiler Chickens Rev. Bras. Ciênc. Avic.
Saccomani,APO; DE,Faria Filho; França,XAA; Dias,AN; Matos Júnior,JB; Faria,DE.
ABSTRACT This experiment aimed to evaluate the utilization of firewood ash as calcium source in the initial diet of broiler chickens. One hundred and twenty eight broiler chickens of Cobb-500® strain, from 1 to 21 days of age, were randomly distributed in four treatments with four repetitions of eight birds each, been four female and four male. The experimental diets were corn-soybean based, been isoenergetic and isonutrients, and had 0, 0.32, 0.98 and 1.27% of firewood ash as calcium source. The firewood ash utilized had 23.8% of calcium, 0.39% of total phosphorus, and 0.11% of sodium. The experimental treatments did not influence the feed intake, body weight, body weight gain, and food conversion from 1 to 7, 1 to 14, and 1 to 21 days of age. The tibia...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternative feedstuff; Bone development; Calcium source; Performance; Poultry.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400645
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The inclusion of coffee in commercial layer diets Rev. Bras. Ciênc. Avic.
Mendes,LR; Silva,RB; Bueno,CFD; Couto,FAP; Dias,AN; Fernandes,V; Faria Filho,DE.
This experiment aimed at evaluating the effect of the dietary inclusion of caffeinated and decaffeinated coffee on the performance and internal and external egg quality of commercial layers. One hundred and twenty 25-week-old Hy-line Brown layers, with 1575 ± 91 average body weight, were distributed according to a completely randomized experimental design with three treatments (control, 1.2% caffeinated coffee, or 1.2% decaffeinated coffee) of five replicates of eight birds each. The inclusion of 1.2% caffeinated coffee was calculated to supply 6mg caffeine per kg body weight, which is considered a moderate dose. The applied treatments did not influence (p>0.05) feed intake, egg production, egg weight, egg mass, feed conversion ratio, Haugh units,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Layers; Caffeinated coffee; Decaffeinated coffee; Caffeine.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200010
Registros recuperados: 5
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