A study was conducted to determine the effect of environmental stress on physiological criteria of feedlot sheep. Treatments consisted of two different housing conditions (shade and no shade) and two levels of concentrate in the diet: high concentrate (70% of concentrate and 30% of roughage-70C:30R); low concentrate (30% of concentrate and 70% of roughage-30C:70R). Animals raised under shade and fed a high concentrate diet (70C:30R) had greater dry mater intake (1258 g/animal/day) and crude protein (0.8% of body weight (BW) […]

An experiment using 60 pigs (½ males and ½ females) was carried out to evaluate the effects of the type of pens floor on the performance and carcass traits of growing-finishing pigs (33 – 84 kg). The pigs were allotted to a randomized block design, with two treatments, tree or two pigs per experimental units (EU), 12 EU per treatment and 30 pigs per treatment. They were housed in pens of 8m2 (2.0 x 4.0 m), allotted to two treatments: […]

Six acclimatized incubators were initially installed in the Experimental Frog Farm of the Federal University of Viçosa and later in Experimental Frog Farm of the Federal University of Rio Grande, with the objective of accomplishing experiments to evaluate the effects of the environment on frogs performance in cages of fiber glass. Environments with temperatures of 25ºC and photoperiod of 12/12 hours of light/hours of darkness (h L/D) were available to frogs adaptation during 15 days before each experiment. The treatments […]

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. […]

Two hundred and forty male broilers of Ross strain, with initial weight of 43 ± 0.2 g, from 1 to 49 days of age, were maintained under thermal comfort (24.2 ± 3.52oC). A completely randomized design with four nutrition plans was used: NP1 (1.1, 1.0, and 0.85% de total lysine); NP2 (1.2, 1.1, and 0.95% de total lysine); NP3 (1.3, 1.2, and 1.05% of total lysine); and NP4 (1.4, 1.3, and 1.15% de total lysine), respectively for the periods from […]

The work objective was to evaluate the effect of using a thermal insulating material installed as lining under the roof, on broiler performance, on environmental conditions of different broiler chickens stocking densities (10, 16 and 22 birds/m2) and on litter characteristics. The experiment was carried out during the summer, using 3328 chicks of Hubbard strain, distributed in a completely randomized design, in a factorial scheme 3×2 (density and sex), with four replicates for each environment. For the environment comparison a […]

ABSTRACT – With the objective to increase the germoplasm availability for forage production, 215 accessions of the genus Paspalum collected in different regions and introduced at the Embrapa Southeast – Cattle Research Center, located at the central region of the São Paulo state. These accessions were evaluated and selected based on their yields in the first year, of dry matter from the vegetative development throughout the year and during the period of high and low rain preciptation. The accesses were […]

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 […]