This research was carried out to evaluate the effect of different levels of concentrate in the diet on the contents of dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF) and crude protein (CP) of the digesta, in the distinct sections of the gastrointestinal tract (GIT) of the dairy calves. Thirty-two young bulls were used, half Holstein and the other half crossbred Holstein-Zebu, were slaughtered with an average age of six months and 190 kg LW final after […]

The starch solubility in bicarbonate-phosphate buffer (SSB) and the ruminal degradability of starch from some feed by the in situ technique, using three Holstein cows, were evaluated in this study. The feeds were ground through a 2-mm screen for the concentrate and a 5-mm screen for forage and incubated using nylon bag (53mm). The starch concentration in corn, sorghum, cassava scraping, wheat bran, triticale, corn silage, sorghum silage, soybean meal, cottonseed meal and citrus pulp were: 79.3, 83.4, 91.4, 49.1, […]

This trial was conducted to evaluate production levels of native breed ewes of Northeast Brazil mated to rams of specialized meat-type breeds. A total of 305 lambings from 134 ewes over three periods of mating were used to determine weaning rate, survival rate and live weight at weaning and total weight of weaned lamb. The hairsheep ewes were mated in a rotational scheme of the use of rams from Santa Inês, Hampshire-Down, Ile-de-France, Suffolk and Texel breeds. Live weight at […]

The objective of this study was to evaluate the effect of the inbreeding on the birth weight (BW) and the weights at the 8 (W8), 12 (W12), 18 (W18) and 24 (W24) month of age, from a Guzera breed herd. The data collected from 1978 to 1992 were obtained from the animal record control of the Fazenda de Ensino e Pesquisa do Campus de Ilha Solteira, UNESP, and referred to the weights, in the above sequence of 2435, 1882, 1770, […]

Twenty-five gilts, from 30 to 60 kg LW, maintained in cold environment, were used to evaluate the effect of levels of digestible energy (DE) from 3100 to 3700 kcal/kg of diet on the performance, carcass composition and blood serum concentrations of free T3. The daily weight gain was not influenced by the dietary DE level, however, linearly influenced the dietary and protein intakes. The feed:gain ratio linearly improved with the increased of the dietary ED level. The DE intake linearly […]

This study was carried out to evaluate the environmental effects on bull-frog (Rana catesbeiana Shaw, 1802) performance, raised in fiber glass cages installed inside acclimatized incubators. After an initial period of 15 days of adaptation, at constant temperature of 25.0ºC, the following experimental treatments were applied: temperatures of 23.0, 26.0, 29.0, 32.0 and 35.0ºC per 30 days for frogs with 100 g initial LW; 24.5, 26.0, 27.5, 29.0, 30.5, and 32.0ºC, also on 30 days, for frogs with 20 g […]

Four metabolism assays were carried out to btain information on the nutrient digestibility of horses feeding. Geldings without definite breed, with average of six years of age, were used. In the experiments were tested: (1) sugar cane; (2) a combination of 59.0% of sugar cane and 41.0% of whole corn grain; (3) elephant grass; (4) and sugar cane with 1.5% of urea. The average DM intake was .89, 1.11, 2.02 and 1.03% LW for sugar cane, sugar cane plus whole […]

The objective of this study was to evaluate the effect of different dietary levels of concentrate on the carcass physical composition. Thirty two pure Holstein black and white type bull calves, into two slaughter groups (group 1: 16 animals slaughtered with 190 ± 10 kg PV and group 2: 16 animals slaughtered with 300 ± 10 kg) with average of 75 days of age and initial 75 kg LW were allotted to a completely randomized design, with four treatments and […]

The objective of this study was to compare age at first calving (AFC) and cow weight at calving (CWC) of straightbred Nellore and crossbred 1/4 Charolais + 3/4 Nellore (1CHA3NEL), and 5/8 Charolais + 3/8 Nellore (5CHA3NEL) cows, and birth weight of calf/CWC (BWR) and weaning weight of calf at 270 days/CWC (WWR) ratios of straightbred Nellore and crossbred 1CHA3NEL, 5CHA3NEL, Canchim (5/8 Charolais + 3/8 Nellore) and 7/16 Charolais + 9/16 Nellore (7CHA9NEL) calves. Analyses of variance were carried […]

This experiment was conducted to evaluate the effect of the addition of different levels of fumaric acid to diet (.0, .5, 1.0, 1.5, and 2,0%) on the performance of growing rabbits. Fifty rabbits of White New Zealand breed, 25 males and 25 females, from 40 to 80 days of age were alloted to a randomized blocks experimental design with five treatments and ten replicates with one animal per experimental unit. The addition of fumaric acid to the diets did not […]