The objective of this study was to evaluate the effects of recombinant bovine somatotropin (rbST) on production, carcass traits, and plasmatic concentrations of IGF-I and thyroid hormones on crossbred Angus-Nellore male calves. Thirty-six calves averaging 63 ± 17 days old and 76.8 ± 14.7 kg of body weight (BW) grazing Brachiaria decumbens and creep fed were randomly assigned (18 calves per treatment) to one of two treatments until weaning (217 days) as follows: I) 1.4 mg of rbST (Boostin®)/kg of […]

Forty-eight (24 barrows and 24 females) Landrace x Large White pigs (averaging 22.69 kg of initial body weight) were assigned to four treatments to evaluate the effect of feeding sunflower cake (SC) on performance and carcass characteristics for swine in the growing and finishing phases. The following increasing dietary levels of sunflower cake (SC) were used: (0, 5, 10 and 15%). Daily weight gain (DWG), daily feed intake (DFI) and feed:gain ratio (FGR)in the growing I (20 to 50 kg […]

Data of 320 animals were obtained from eight comparative slaughter studies performed under tropical conditions and used to estimate the total efficiency of utilization of the metabolizable energy intake (MEI), which varied from 77 to 419 kcal kg-0.75d-1. The provided data also contained direct measures of the recovered energy (RE), which allowed calculating the heat production (HE) by difference. The RE was regressed on MEI and deviations from linearity were evaluated by using the F-test. The respective estimates of the […]

The objective of this experiment was to study the effect of the recombinant bovine somatotropin (rbST) on the percentage distribution and diameter of semitendinosus muscle fibers. Thirty-six ½ Angus-Nellore crossbred bull calves, 63 ± 17 days old and weighting 76.8 ± 14.7 kg, raised in Brachiaria decumbens pastures and creep fed, were assigned to one of two treatments until weaning (217 days): eighteen calves received 1.4 mg/kg of rbST (Boostin®) every 14 days and eighteen control calves received saline solution. […]

This work aims to evaluate the relationships between body measures of foals from birth to twelve months of age and mature animals of Mangalarga Marchador breed. Measures were body weight and measures of height, length, width, girth of animals. Corporal Index (CI), Meloscopic Index (MI), Dactilo-thoracic Index (DTI) and Weigth in Cannon Index (WCI) were used to evaluate the relationship between measures. The Eclectic System of Linear Proportions was used to evaluation the proportions between linear measures and head length. […]

This work was carried out to evaluate angular measures of foals, from birth to 12 months age, and mature animals of the Mangalarga Marchador horse. Eleven angular measures of 98 foals, 55 males and 43 females, were taken on the birth day and at each thirty days up to complete 12 months of age. Results of measures were submitted to analysis of variance and mathematical model included effects of sex, region, nutritional management, herd, month and year of birth. The […]

The data analyzed were live weights of females (3475) of six genetic groups obtained by crossing red and white Holstein-Friesian (HVB) x Guzerá (Guz), with expected HVB gene fractions 1/4, ½ (F1) , 5/8 (from inter se mating), 3/4, 7/8 and > 31/32. The data were separately analyzed for 374 calves (up to age 120 d) and 524 heifers (121 to 550-d-old), using Proc Mixed of the SAS package, under a model including the fixed effects of genetic group (G), […]

The domestication of Podocnemis expansa (Gigant Amazonian turtle) with commercial purpose it was implanted in Brazil in 1992. However, a lot of subjects about handling, nutrition, sanity and mainly reproduction are still obscure these animals. The objective of this study was evaluated the effects of crude protein concentration and source on body weight of Podocnemis expansa. The turtles (n=480) were transferred to Setor de Piscicultura EV/UFG. Six animal groups (80/each) were put in water tanks of 500 liters. Five groups […]

Genetic parameters were estimated for weight at the beginning of breeding season (PEM), considered as an indicative of mature weight of Nelore cows. Data file comprised 7,902 records from 1,556 cows from to a selection experiment conducted at the Estação Experimental de Zootecnia de Sertãozinho, SP, Brazil. PEM were analyzed either as the last weight available for each cow in the data file (PEM_U) or as repeated records, including all weights (PEM_R). The analyses were also performed excluding the records […]

An experiment was carried out to estimate dietary crude protein and energy requirements of 128 females of Japanese quails from 15 to 32 days of age, by the factorial method. A completely randomized design with four treatments with four replicates of eight birds was used. The treatments were: T1 = basal diet (BD) with 24.1% CP and 2,900 kcal AMEn ad libitum, T2 = 80%, T3 = 60% and T4 = 40% of T1 (close to maintenance). In the beginning […]