The trial was carried out from August/1997 to April/1998 to evaluate a Coastcross-1 (Cynodon dactylon (L.) Pers) grazed pasture, under four dry matter residue levels (DMR: 1978; 2130; 2545; 3857 kg of DM/ha), with continuous grazing and variable stocking rate. Chemical composition, as crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents, in vitro dry matter digestibility (IVDMD) and ewes performance were evaluated. A complete randomized design with two replications was used. CP content in forage […]

Forty-eight female pigs were used to determine tissue growth curves after slaughter of the animals at 50, 60, 70, 80, 90, 100, 110 and 120 kg and dissection of the carcasses. The lean cuts in carcass were made according to that used by Brazilian pork slaughters. In each cut it were separated muscle, fat, bone and skin amounts. The expanded allometric function was used to estimate and to fit the growth curves. The muscle amounts in carcass increased to 41.9% […]

Thirty Nellore bulls, averaging 20 months of age and 330 kg, were used to evaluate the effects of concentrate inclusion on the liquid and dietary requirements of calcium (Ca), phosphorus (P), magnesium (Mg) and potassium (K). After a period of adaptation (40 days), five animals were slaughtered as reference and the 25 remaining were allotted to five treatments (25.0, 37.5, 50.0, 62.5, and 75.0% of concentrate, in DM), in a completely randomized design, with five replicates. The slaughter weight was […]

The aim of this study was to compare and evaluate the use of on-test age (ONA), off-test age (OFA), on-test weight (ONW), and off-test weight (OFW) as covariates for analysing average daily gain (ADG) in Landrace (LD), Large White (LW) and Pietrain (PT) swine breeds. One- and two-traits analyses were carried out using Restrict Maximum Likelihood method, with a statistical model that included the fixed effect of contemporary group, the random genetic effects of animal and maternal (the latter just […]

Leaf blades and stem segments at two stages of development (day of leaf ligule exposure and 20 days thereafter) and two insertion levels on tillers (lower and upper) of signalgrass (Brachiaria decumbens), molassesgrass (Melinis minutiflora) and tifton 85 bermudagrass (Cynodon sp), were sampled in two seasons of the year (summer and autumn). The anatomical and chemical traits, and in vitro dry matter digestibility of blades and stems segments were evaluated. The correlations among these variables were established to associated values […]

Yield records of Holstein cows were used to verify the interaction effect on accuracy of sire breeding values. The records of milk yield were adjusted to 305 days of lactation and age of the cow. Variance components for milk yield were estimated using restricted maximum likelihood methodology through two animal models, either not fitting or fitting a sire-by-herd interaction term. Likelihood ratio test was used to verify the effectiveness of including a sire-by-herd interaction effect in the model. Average milk […]

The effects of the temperature and of the photoperiod on the bull frog sexual maturation of frogs weighing 94.22 g ± 12.03, maintained for thirty days under temperatures of 20, 23, 26, 29, 32 and 35°C, with photoperiod of 12/12 hours of light/hours of darkness (h L/D), were evaluated. Temperature affected the weights of the fat body and liver, that varied according to quadratic models, and higher weights of fat body at 27.27°C and of liver at 26.81°C were considered. […]

The objective of this study was to determine the nutritive values of some feeds from frogs diets, in a digestibility assay, using the forced feeding method, with 84 frogs at finishing stage (128,5 g ± 2 g) and 120 at initial stage (27,3 g ± 2 g), housed in metabolism cages. Forty frogs at initial stage and 28 at finishing stage were fasting, to determine the endogenous and metabolic losses. The values of apparent metabolizable dry matter (AMDM – %), […]

The pre-weaning performance of Nellore (N), Guzerá x N (GN), Red Angus x N (RN) and Marchigiana x N (MN) calves, from a crossbreeding experiment conducted at IAPAR Paranavaí Experimental Station, produced by artificial insemination, born between 1985 and 1998 within two birth seasons (January to April and July to December) was studied. The least squares method was utilized to analyze 721 observations of birth weight (PNT) and 686 of weaning weight (PDS) and average daily gain from birth to […]

An experiment was conducted with piglets allocated in eight treatments combinations with different types of diet (dry and wet), rations (with and without sweetener) and two types of drinking water (with and without sweetener), offered after weaning to study the effects on histology and intestine enzymatic development. Intestinal villi height, crypt depth, and relation between villi height and crypt depth of duodenum and jejunum, jejunum protein content and enzyme activity of maltase, sucrase and dipeptidase were evaluated. Thirty two Large […]