The experiment was carried out with the objective of evaluating the weight gain, intake of nutrients, and the apparent digestibility of diets based on spineless cactus in native ewes in feedlot system in Brazilian semiarid region. Two spineless cactus feeding strategies were evaluated: spineless cactus (Opuntia ficus-indica) separated from the Tifton hay + concentrated mixture, and with Tifton hay mixture + concentrate. It was used forty native breed ewes (Barriga Preta, Cara Curta, Cariri and Morada Nova), with average initial […]

This work was carried out with the objective of studying the growth profile and the nutrients deposition on organs (heart, liver, gizzard, intestine and proventricle) of male and female broiler chickens from Ross and Cobb lineages. It was used 1,920 chicks at the age of one day placed in experimental shed boxes on the floor. The experimental design was completely randomized in a 2 × 2 factorial model composed of 2 sexes (mates and females) and two strains with 4 […]

This experiment was carried out to evaluate the reproductive and zootechnical performance, and lipid deposition in the liver tissue of the Nile tilapia males fed diets containing different levels of digestible energy obtained from inclusion of soybean oil. Four hundred 400 broodfish (300 females and 100 males) were assigned to a completely randomized design composed of five levels of digestible energy (2,700, 2,950, 3,200, 3,450 and 3,700 kcal digestible energy.kg of feed-1) and four replications. The breeding were fed diets […]

It was evaluated 27,523 and 21,746 records on traits of conformation, finishing precocity and musculature measured at weaning and a year after weaning, respectively, for the estimation of (co)variance components among these traits, and between them and body weights at the same ages. The data were analyzed by employing an animal model with direct and maternal genetic effect and permanent maternal environment effect. Restricted maximum likelihood was employed for the estimation of genetic parameters. The heritability estimates of visual scores […]

This study was performed to evaluate the effects of reduction of dietary crude protein level with supplementation of industrial amino acids on the performance and carcass yield of broilers between 22 to 42 days of age, under heat stress. It was used 280 Cobb broilers with initial weight of 856 ± 7.41 g, distributed in a complete randomized experimental design, with five crude protein levels (21.6; 20.6; 19.6; 18.6 and 17.6%), eight repetitions and seven broilers per experimental unit. The […]

The research aimed to evaluate the use of additives on the fermentative and bromatological characteristics and the population of yeast of the sugarcane silage. The experiment was carried out in a complete randomized design with four replicates. It was tested different amount of additives added to the sugarcane silage at ensiling (based on the forage fresh matter) which were the following: urea 1.5%; urea 0.5% + corn meal 4%; urea 0.5% + dehydrated cassava 4%; starea 1.5%; sugar cane only. […]

The objective of this work was to evaluate effect of based-soybean or cottonseed meal concentrate rations in diets with corn silage on nitrogen balance (NB) and microbial protein production in growing dairy females. diets consisted of the combination of two levels of concentrate ration, 1 or 2 kg, and two protein sources, soybean meal or cottonseed meal. The animals that consumed 2 kg of concentrate ration showed greater total nitrogen intake, however, there was no significant effect on fecal-N, urine-N […]

It was evaluated data set of 19,303 weight records of Santa Inês sheep in order to evaluate distinct polynomial functions with different order for better adjustements of fixed and random regressions of growth trajectory and to estimate (co)variances components and genetic parameters of this trajectory. Fixed effects used in analysis were contemporary group, sex and birth type. Ordinary and Legendre polynomials, ranging from two to four orders, were evaluated for fixed regression of average growth trajectory. Legendre and quadratic b-spline […]

It was evaluated in this study the environmental effects on body weights of goat kids from birth to 150 days of age of Tunisian local goat population, on the basis of 1,656 records obtained from the Arid Areas Institute of Médenine, Tunisia, during 2001-2005. Except for birth weight, individual records were adjusted for standard ages (30, 60, 90, 120 and 150 days) using either extrapolation or interpolation on field data. Data were analyzed by GLM procedure and SNK (α = […]

It was evaluated the inclusion of millet perls in rations with 30% of digestible protein and 3,000 kcal/kg of digestible energy for Nile tilapia fingerlings. The experiment was carried out in complete randomized design with five rations (0.00; 7.00; 14.00; 21.00 and 28.00% millet perls inclusion), each one with five replicates. It was used 200 sexual reverted Thai lineage Nile tilapia fingerlings, at 0.92g of initial weight and 35 days of age, distributed in 25 tanks (150 L). Weight gain, […]