José Humberto Vilar da Silva

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AIMS To evaluate mannan oligosaccharide (MOS) and threonine effects on performance, small intestine morphology and Salmonella spp. counts in Salmonella Enteritidis-challenged birds. METHODS AND RESULTS One-day-old chicks (1d) were distributed into five treatments: nonchallenged animals fed basal diet (RB-0), animals fed basal diet and infected with(More)
Response surface methodology (RSM) and 5-level-4-factor central composite design (CCD) were used to evaluate the response of broilers (BWG and FCR) to dietary digestible protein (dP), lysine (dLys), methionine+cysteine (dTSAA), and threonine (dThr). Eighty 4 cages of 5 birds each were assigned to feed diets contained 5 levels of dP (18, 19, 20, 21 and 22%),(More)
Four experiments were conducted to estimate the phosphorus and calcium requirements for weight maintenance and weight gain in Japanese quails during their growth phase from 16 to 36 days. Japanese quails aged 16 days were used for estimating the phosphorous and calcium requirements for weight maintenance or weight gain, with these quails composing each(More)
Commercial chicken eggs are often incubated in complete darkness, although in nature they would receive some light exposure. Light, like other environmental stimuli, has been shown to affect hatchability and post hatch development. To determine if there is an effect of exposing embryos to light of warm (3900 K) or cool (5500 K), we incubated broiler chicken(More)
The aim of this research was to determine the nutritional requirements of sodium for Japanese quail (Coturnix coturnix Japonica) during the periods of 1 to 21 d and 22 to 40 d of age, as well as to evaluate the residual effect on egg production and densitometry bone traits from 41 to 63 d. Two experiments were developed. Experiment 1: 360 Japanese quail(More)
The objective of this study was to evaluate the chemical composition and bone strength of the tibiotarsus of broilers at 7 and 14 days of age. Bone percentages of collagenous protein (CPr), non-collagenous protein (NCPr) and minerals (calcium, phosphorus, potassium and sodium) were determined. The experiment utilized 650 male Cobb chicks at one day of age,(More)
Levels of metabolizable energy (ME) of 2,900, 3,100 and 3,300 kcal and energy to protein ratio (EM: PB) of 128, 148, 168 and 188 kcal/%CP were evaluated with male broiler chicks from 22 to 42 days of age, assigned to a completely randomized 3 x 4 factorial design, where each treatment had four replications of 18 birds. Increasing the ME: CP ratio resulted(More)
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