ABSTRACT The objective of this study was to compare the histopathological aspects of the liver of free-living and farmed bullfrogs (Lithobates catesbeianus). Thirty liver samples were collected from young and adult bullfrogs in the states of Minas Gerais and Rio de Janeiro, Brazil. Marked blood congestion and even hemorrhage and a large number of melanomacrophages were observed in most of the livers from free-living bullfrogs. Additionally, hepatocytes showed cytoplasmic eosinophilia and some showed nuclear hypertrophy and presence of microvesicular steatosis; […]

Sixty New Zealand rabbits aged 40 days were divided into 4 groups of 15 animals. The control group received a free diet of antibiotic growth promoter (AGP) and inulin. The second group was supplemented with 2.5 g/kg of inulin. The third was administered AGP with 0.1 g/kg of flavomycin. Finally, the fourth group received a 2.5 and 0.1 g/kg inulin/AGP diet. Body weight gain was higher in the control group. Rabbits supplemented with inulin had lower values ​​of triglycerides compared […]

The objective of this study was to evaluate the physical-chemical and sensory quality and fatty acid profile of Minas cheese produced from milk from crossbred cows fed diets with four roughages (sugar cane, sorghum silage, sunflower silage and pasture of Panicum maximum cv. Tanzania). Yield, physical-chemical composition, fatty acid profile and sensory analysis of Minas cheese, as well as the physical-chemical composition of milk were analyzed. For the experiment, eight 1/2 Holstein/Gir crossbred cows, with lactation period of 180 ± […]

The assay was carried out to determine the effect of phytase supplementation on performance of broilers from 1 to 21 and 1 to 40 days of age. Twelve hundred and fifty male broilers (Ross) were distributed in a randomized experimental design, with five treatments, 10 repetitions and 25 birds per experimental unit. The treatments consisted of evaluating the phytase supplementation in diets with reductions in nutritional levels, compared with the positive control. The nutrient contents in negative controls one and […]

In order evaluate digestible lysine levels in diets supplemented with 20 ppm of ractopamine on the performance and carcass traits, 64 barrows with high genetic potential at finishing phase were allotted in a completely randomized block design with four digestible lysine levels (0.80, 0.90, 1.00, and 1.10%), eight replicates and two pigs per experimental unit. Initial body weight and pigs’ kinship were used as criteria in the blocks formation. Diets were mainly composed of corn and soybean meal supplemented with […]

The objective of this work was to test the efficiency of enriched and purified lignin, Lipe®, as external indicator in order to estimate the apparent digestibility of the nutrients in equine diets, compared with the total feces collection and the chromic oxide methods. Six female Mangalarga Marchador with average of two years of age and average weight of 331 kg were used. The diet was alfalfa hay, commercial grain and mineral salt. The experimental period was of 29 days, the […]

The objective of this study was evaluate the yields and weights of the organs, viscera, by-products and edible offal in 32 males castrate Morada Nova hair sheep breed, in feedlot, fed with diets containing 20.0 40.0 60.0 and 80.0 % of concentrate. The animals (8.11 ± 1.15 months old, 19.67 ± 2.97 kg BW) were slaughtered at 30.0 kg BW. A completely randomized blocks design, with four diets and eight replicates, was used. The crescent concentrate levels increased empty body […]

This experiment analyzed the enzymatic activity of the exogenous protease in the fish digestive tract and, afterwards, it was also evaluated the growth performance of tucunaré paca (Cichla sp.) juvenile by the addition of four exogenous protease levels to a control diet with 40% CP. To evaluate the best enzyme inclusion level, four pelleted diets were elaborated with the following exogenous protease levels (0.00, 0.05, 0.10 and 0.15%), in a completely randomized design in a 4 × 4 factorial arrangement. […]

Thirty-two intact lambs averaging 17.1 kg of initial body weight were assigned to one of the following four treatments: 30, 45, 60 or 75% of dietary concentrate in a completely randomized design (eight lambs/treatment). Lambs were feedlot fed during the experimental period (43 days). After slaughter, carcasses were refrigerated for 24 h. It was measured the weights and percentages of five cuts from the half carcass as well as the proportion of muscle, bone and fat tissue from the leg. […]

A completely randomized experiment was run to evaluate the effect of methionine and lysine supplementation on the pejerrey (Odontesthes bonariensis) fingerlings performance. Four treatments were compared: Diet T1 control, with available contents mehionine and lysine in products used in formulation of diets; Diet T2 supplemented with 4.76% of DL- methionine; Diet T3 supplemented with 4.76% of L- lysine and Diet T4 with 4.54% of DL methionine and 4.54% of L lysine. Resulted showed that diets containing methionine were more efficient […]