A survey was conducted on chicken broiler farms from Romania in August-November 2010 to evaluate economic losses due to coccidiosis. Data were collected from six broiler farms of different capacity regarding chemoprophylaxis program, weight gain, feed conversion, and mortality, for two previous flocks in two houses of each farm, and finally we evaluated the economic losses. Also, faeces samples were collected and oocysts were classified according to their size, and virulence of each Eimeria spp. field isolate was determined by […]

The supplementation of concentrate to young bulls kept in pastures of Brachiaria brizantha cv. Marandu during the dry season of the year was evaluated. A total of 16 young bulls from Canchim breed, with 7 mo old and 250 kg, was allotted to a completely randomized design in 2 × 2 factorial arrangement. The factors consisted of balanced supplements for two potential of microbial fermentation – 9.5 and 11.0 g microbial crude protein/MJ fermentable metabolizable energy and for weight gain […]

The objective of this trial was to evaluate partial and total tract digestibilities of diets containing Brachiaria brizantha hay plus concentrate fed to young bulls. Four Santa Gertrudis young bulls fitted with duodenal and ruminal cannulae were used in a 4 x 4 Latin square. Diets were formulated to yield daily body weight gains (BWG) of 0.5 or 1 kg/animal and potential of microbial fermentation of 9.5 or 11 g of microbial crude protein/MJ fermentable metabolizable energy. Apparent digestibility of […]

The objective of this trial was to estimate the efficiency of utilization of metabolizable energy (MEEU) for maintenance (Km) and weight gain (kg) of feedlot purebred and crossbred Nellore. Seventy-two young bulls averaging 10 to 11 months of age from four genetic groups: Nellore, F1 Nellore x Angus, F1 Nellore x Brown Swiss and F1 Nellore x Simental and initial average body weights of 286, 309, 333 and 310 kg, respectively, were used in this study. A completely randomized design […]

A Bayesian marker-free segregation analysis was applied for the estimation of variance components and to search for evidence of segregation genes affecting two carcass traits: intramuscular fat (IMF), %, and backfat thickness (BF), mm ; and one growth trait: body weight gain (LG) from 25 to 90 kg, approximately, g/day. In this study, 1,257 animals from the F2 design produced by breeding among pigs Meishan (male) and Dutch Large White and Landrace lines (female) were used. In animal breeding, finite […]

Fifty-one postpartum Nellore cows were used to study the effect of the utilization of protein concentrate, during the summer time, on the forage intake, weight gain and body condition score changes after parturition of Nellore cows. The animals were randomly allotted in the following treatments: T0 – without supplementation; T1 – supplemented with 1 kg and T2 – supplemented with 2 kg of concentrate with 40.8% of crude protein, during 105 days. During this period, body score and body weight […]