The research aimed to analyze the effects of feed restriction prior to the confinement on growth and chemical composition of the tissues and organs in cattle. Twenty-four Holstein-Gyr crossbred steers, with 19,3 ± 5,1 months of age and 202,1 ± 49,1 kg LW, at beginning of the trial were used. Fifteen of the animals were confined after a 104-day period of forage restriction, in which it was intended to keep body weight unchanged (compensatory gain group), while nine of them […]

The work was conducted with the objective to study the allometric growth of the bone, muscular and fat tissues in the left side of growing lamb carcasses. Thirty-six, twenty-four Santa Ines and twelve Bergamacia lambs were used. The animals were kept in individual pens and fed ad libitum diets. The slaughtering was done when the animals reached the live weight of 15, 25, 35 and 45 kg. The amount of the different tissues was obtained through the dissection of the […]

The research aimed to analyze the effects of feed restriction prior to confinement on growth and chemical composition of the carcass and carcass components in cattle. Twenty-four Holstein-Gyr crossbred steers, with 19,3 ± 5,1 months of age and 202,1 ± 49,1 kg LW, at the beginning of the trial were used. Fifteen animals were confined after a 104-day period of forage restriction, in which it was intended to keep body weight unchanged (compensatory gain group), while nine of them had […]

Diets composed by four different levels (0; 53; 65 and 100%) of canola meal replacing soybean meal crude protein (CP) were evaluated using foals. The diets were isoproteic (17% CP) and isocaloric (4200 kcal/kg). Sixteen Managalarga breed foals, eight males and eight females, averaging 10 months and 218 kg LW, fed a total intake of 2.5% LW on dry matter (DM) basis were used. The diet was composed by 60:40 forage to concentrate ratio. A completely block experimental design, with […]

The objectives of this work were to estimate the requirement of lysine from 7 to 12 weeks and to evaluate their effect on the egg production phase. Two hundred egg-white pullets (EW), and two hundred egg-brown pullets (EB) strains were allotted in randomized block design, and fed a basal diet with 16.0% of crude protein (CP) and 2,900 kcal/kg metabolizable energy (ME), supplemented with L-lysine HCl for the level of 0.50, 0.55, 0.60, 0.65, and 0.70% of total lysine in […]

The objective of this work were to estimate the requirement of lysine from 0 to 6 weeks and to evaluate the posterior effect on the performance of two egg-type strains. Three hundred egg-white pullets from 0 to 6 week of age and three hundred egg-brown pullets from 0 to 6 week of age were allotted to a randomized block design with five treatments and four replicates. A basal diet with 18.50% of crude protein (CP) and 2900 kcal metabolizable energy […]

The objective of this work was to estimate the requirement of lysine from 13 to 20 weeks and to evaluate the posterior effect on the performance of two egg-type strains. Three hundred egg-white pullets from 13 to 20 weeks of age and three hundred egg-brown pullets from 13 to 20 weeks of age were allotted to a randomised block design with five treatments and four replicates. A basal diet with 14.0% of crude protein and 2900 kcal metabolizable energy/kg was […]

Data collected from 1982 to 1999, in Brasília, DF, Brazil, on 1102 head of Brazilian Bergamasca sheep were analyzed to obtain information on performance of the breed in the region. Average lambing interval was 337.94±109.4, but under continuous mating, the average lowered to 282.1days. Ewe lambing rate was 90.13%, frequency of twins 12.63%, number of triplets negligible and sex ratio 1:1. Lambing occurred in all months of the year. Age at first lambing was 588.58±65.31days. Average birth, 3, 6 and […]

The objective of this work was to evaluate the average daily dry matter intake (DMI), DMI per 100 kg of live weight (DMIP), DMI per unit of metabolic weight (DMIM), feed: gain (FG) and average daily weight gain (ADG) of beef calves fed with different levels of crude protein in the diet. Forty-seven Braford intact male calves, 66 days old and 76.4 kg of live weight were used. Animals were full fed with oat silage and concentrate (50/50), with 13; […]

Informations of 7986 births of animals from a Nellore cattle herd, from 1960 to 1993, were used to estimate (co) variance components, heritabilities and genetic correlations of weaning weight (W240), yearling weight (W365), age at first calving (AFC), first calving interval (CI1), reproductive efficiency (RE), longevity (LONG), calculated as years of permanence of cow in herd and weaning weight of the first calf of cow (W240C). The analysis were performed using the MTDFREML software, estimating the (co) variance components by […]