The objectives of this research were to evaluate the influence of rearing systems (intensive or semi-intensive) on the performance (body weight and feed efficiency), chicken physiological condition under heat stress (rectal temperature, respiratory frequency and hematocrit) and behavioural parameters (frequency in the pasture areas) of broilers lines. To evaluate broiler’s performance and physiological condition on the ages of 45, 55, 65 and 75 days one experiment was carried out in boxes with 4,5 m2 of inside area and 35 m2 […]

The quality of B. radicans, former B. radicans pasture, was evaluated using extrusa collection, hand-plucked and total availability methods. Three esophageous fistulated steers were used for the extrusa collection. Samples for total availability of the pasture were collected cutting plant material close to the ground inside a metalic square (0.5 x 0.5m). hand-plucked method was performed manually. There was a significant effect for the months of collection for the in vitro dry matter disapperance, but not among the collection methods […]

The follicular dynamics and luteal regression were studied in 12 Gir and seven Nelore cows, treated with analog prostaglandin F2a, between day 10 and 12 of the estrous cycle. The synchronization rate was higher than 92% for the two breeds, and the ovulation of second dominant follicle occurred in 72.7% of Gir and all Nelore cows. Ovulatory follicle diameter for Nelore was lower (11.0 ± 0.9 mm) than Gir cows (13.0 ± 1.7 mm). The average intervals from treatment to […]

The use of pre-pubertal calves as oocyte donors offers a considerable potential to increase the genetic gain lowering the generations interval, as well as increase the usage of bovine females with high genetic value. The objectives of this study were to analyze the effect of age and of the stimulatory treatment with gonadotropins in the follicular response, the recovery rate, quantity and quality of oocytes of the prepubertal Nelore (B. t. indicus) calves. Twelve Nelore prepubertal females were stimulated with […]

Four cattle breeds (Gyr, Nellore, Guzerat and Holstein) were analyzed by amplification of genomic DNA using microsatellite loci to evaluate the genetic diversity within and among them. DNA samples of 18 animals from each breed were collected to access the genetic content of them. Allele frequencies were calculated and used to generate a Nei’s genetic distance matrix what was used to build a dendrogram following UPGMA clustering. As expected, Holstein breed was the most distinct from the other breeds: 1.15 […]

This experiment was carried out to estimate the requirements of total lysine and lysine: crude protein (CP) ratio to laying quails. It was used three hundred and twenty birds offspring from crossing breeding of Japanese and European quails from 60 to 144 days of age, live weight of 178+12 g, fed diet with 20 and 23% of CP, and five rates of lysine (0.80, 0.95, 1.10, 1.25 and 1.40%). A completely randomized experimental design in a factorial scheme 2×5 (two […]

The study was undertaken in Coronel Pacheco – MG (National Dairy Cattle Reserch Center of the Brazilian Agricultural Corporation – EMBRAPA), to evaluate, under grazing conditions, the Cynodon nlenfuensis, Vanderyst and three cultivars of Cynodon dactylon, L. Pers. (Florona, Florakirk, Florico), fertilized with either 250:200 or 500:400 kg/ha/year of N:K2O. The experimental design was a randomized blocks, in split-plot, and three replications. No significant difference on dry matter yield between the two rates of N/K2O were found. In both N:K2O […]

A study was conducted to evaluate the use of cashew nuts meal (CNM) in diets for sheep, raised in feedlot. Thirty two crossbred animals received concentrates with the same amount of crude protein, but four different levels of CNM (0, 12, 24 and 36%). A factorial 4 x 2 was used, with four levels of CNM and 2 sexes, with four repetitions. Daily weight gain and feed conversion as well as intake of dry matter (DM), crude protein (CP), ether […]

The present study evaluated the effects of alternating food restriction and refeeding cycles on the growth of pacu, during the growout phase and the viability of this practice in the commercial production of the species. Juvenile fish were distributed in 3 tanks and submitted to different feeding strategies: group A (fed ad libitum daily), B (food restricted to 4 weeks and refed for 9 weeks) and C (food restricted to 6 weeks and refed for 7 weeks) totalizing 13 weeks […]

The use of automatic feed barrel with grain corn as a methodology to mark, recapture and management of white-lipped pecaries (Tayassu pecari) reintroduced on a Savanna area located at Mato Grosso do Sul State was tested. Using this technique we could compare the weight gain managing animals on extensive (freedom on the area) and semi-extensive systems (restricted to a 15ha area), and examine reproductive biology aspects of this specie. The management of white-lipped peccaries on the extensive system provided a […]