The experiment carried out in aiming to evaluate the tissue and chemical composition of longissimus dorsi muscle of Suffolk lambs fed on creep feeding system with ration containing 0.0, 6.60, 13.20 and 19.80% of sunflower seed. At kidding, the lambs were identified, weighed and randomly distributed to paddocks composing four replicates per ration, totaling 16 lambs. The rations contained 2.65, 2.78, 2.89 or 2.93 Mcal/kg of ME and 18.38, 18.75, 19.98 and 21.18% of CP and were ad libitum fed […]

The effect of decreasing dietary crude protein (CP) with supplementation of amino acids, based on the ideal protein concept on Nile tilapia (Oreochromis niloticus) fingerlings performance was evaluated. A total of 396 fingerlings from Thai strain, with 0.80 ± 0.17 g of BW, was allotted to a randomized block design, with six levels of CP (32, 31, 30, 29, 28 and 27% of CP) in the diets, six replications with 11 fish each. The diets were formulated to be isocaloric […]

Two experiments were carried out to evaluate structural characteristics and crude protein concentration of Pennisetum purpureum cv. Cameroon and Brachiaria brizantha cv. Marandu under four rotational stocking rates. During the rainfall period, the studied stocking rates for both pastures were 3, 4, 5, and 6 steers/ha and in the dry period the stocking rates were 2, 3, 4, and 5 steers/ha. In both experiments, elephantgrass cv. Cameroon produced greater total herbage mass and green herbage mass, which decreased with the […]

The effects of three feeding management were evaluated in the winter months (CN: natural pasture; CNS: natural pasture + supplementation; CNM: improved natural pasture) and three live weight groups (light, medium, heavy) on the subsequent reproductive performance of Brangus heifers with first service to 24/27 mo old. Feeding managements showed differences in the daily weight gain (DWG) during the winter (0.261, 0.376 and 0.679 kg/day) in body weight at the beginning of the reproductive period (302.8, 317.8 and 330.7kg for […]

The objectives of this study were to map Quantitative Trait Loci (QTL) in chromosomes 16, 17 and 18 and to associate their effects with performance traits in a F2 pig population developed by mating two Brazilian Piau sires with 18 crossbred dams (Landrace x Large White x Pietrain). The linkage map for this population was constructed after genotyping the animals for 11 microsatellite markers and scoring the genotype. Estimates of polymorphic information content (PIC) indicated that the microsatellite markers were […]

Two trials were conducted to evaluate losses of Marandu grass silages using different additives. The fermentation profile and aerobic stability of the silages were evaluated on the first trial. The followings silages were evaluated: 1 – Marandu grass (Control), 2 – Marandu grass plus L. plantarum and Propionibacterium, 3 – Marandu grass plus L. buchneri, 4 – Marandu grass plus 0.1% of sodium benzoate. On the second experiment, it was utilized nine castrated Nellore steers (Body weight 350 ± 38.9 […]

The non-carcass components of castrated and non-castrated cattle (sex condition) finished in feedlot and slaughtered at 16 (super young) or 26 (young) months of age (animal category) were evaluated. The diet was formulated to contain 11.8% of CP and 2.83 Mcal/kg DM of DE with 50:50 forage to concentrate ratio (%MS). Super young animals showed higher of empty body dressing percentage (92.39 versus 89.76%), as a result of their lower gastrointestinal content (35.23 versus 53.46 kg) as compared to the […]

The effects of feeding a pre-starter diet (PSD) and weight at housing on performance and carcass characteristics broilers were evaluated. A total of 960 day-old male chickens, commercial line Cobb-500, was housed in 32 floor pens as a completely randomized design in a 2 x 4 factorial arrangement [weight at housing (42 and 46 g) and periods of feeding pre- starter diet (0, 1 to 7, 1 to 10 and 1 to 14 days old) for 49 days. The feeding […]

This study was carried out to evaluate the effect of cannula placement site and hour of collection on the botanical composition of sheep diet. Ten castrated sheep Santa Inês breed were used, with five of them using permanent ruminal cannula and the five others with esophageal cannula. Water and mineral mix were available ad libitum. Samples collected from both cannulas revealed 39 species with an average of 20 species occurring in each monthly sampling. In addition, other Poaceae species were […]

Random regression and Legendre polynomial (LP) of different orders were used for modeling the genetic, permanent environmental and residual variances of test day milk yield in dairy goats. The models included the fixed effects of contemporary group, age of dam at kidding as a covariate and the fixed regression of LP for the average lactation curve and the additive genetic, permanent environmental and residual as random effects. According to the values of the logarithm of the likelihood function, AIC and […]