This work was carried out to evaluate the characteristics of meat quality, centesimal composition and lipid compounds (cholesterol and fatty acids) of longissimus thoracis muscle in Angus (n=30) and Nelore (n=30) bulls, at 36 months of age and 250 kg of carcass weight, finished in pasture. The results for pH, lightness, redness, cooking loss were similar among genetic groups. However, samples of Angus showed higher yellowness (4.87 and 4.04) and lower Warner-Bratzler shear force (7.86 and 9.13 kg) than samples […]

In order to estimate covariance functions by using random regression models on Legendre polynomials, 35,732 weight records from birth to 660 days of age of 8,458 animals of Tabapuã cattle were used. The models included: as random effects, direct additive genetic effect, maternal effect, and animal and maternal permanent environmental effets; contemporary groups were included as fixed effects; and as covariables, animal age at weighing and age of dam at calving (linear and quadratic effects) and on age at weighing,, […]

It was evaluated nitrogen compounds and microbial protein synthesis in heifers fed diets containing coffee hulls (0.0; 8.75; 17.25; and 26.25% of dry matter) replacing ground corn concentrate at the following levels of coffee hulls in the total diet dry matter: 0.0, 3.5, 7.0 or 10.5%. It was used 24 crossbreed heifers (7/8, 15/16 and 31/32 Holstein-Zebu), which were distributed in a random block design made up accordingly to the weight of the animals. Spot samples of urine were colleted […]

The objective of this work is to determine the nutritional requirement of digestible threonine for brown-egg laying hens between 79 to 95 weeks of age. For this experiment, 180 commercial Lohmann Brown laying hens were used, distributed in five digestible threonine levels (0.380; 0.413; 0.446; 0.479 and 0.512%), each one with six replicates and six hens/replicate. It was observed a quadratic effect of threonine levels on the feed intake, egg mass conversions, egg dozen conversions, egg production, egg weight, and […]

The objective of this work was to study the morphologic development and the swimming and feeding behaviors of piracanjuba larvae, Brycon orbignyanus Valenciennes (1849) (Characiformes, Characidae, Bryconinae), during the period from zero to 172 hours after hatching (standard length = 3.62 – 11.94 mm). The morphological analyses were accomplished by using a trinocular stereo microscope, while the behavioral analyses were performed through periodic observations. In 28 hours after hatching, the larvae (standard length = 6.25 ± 0.13 mm) showed the […]

The main purpose of the present study was to identify for candidate genes related to ovulation in swines. To do so, it was investigated in ovarian follicular cells through quantitative real-time PCR the differential expression of the following genes: steroidogenic acute regulator (STAR), GATA-binding protein 4 (GATA), prostaglandin F2α (PGF2α), progesterone receptor (P4R), follicle-stimulating hormone receptor (FSHR), and cytochrome P450 aromatase (CYP19). These genes encode hormone receptors (FSHR and P4R), hormone (PGF2α), steroidogenic proteins (STAR and CYP19) and transcription factor […]

To evaluate the influence of benzocaine concentration on the induction and recovery from anesthesia in different sized Nile tilapia (Oreochromis niloticus), it was developed a random block experiment design in 4 × 4 factorial consisted of four fish lengths (6; 10; 14 and 18 cm total lenght) and four benzocaine concentrations (60; 120; 180 and 240 mg of benzocaine per liter of water). The induction and the recovery from anesthesia were divided in three stages based on the behavior of […]

The objective of this trial was to evaluate two intervals of grazing on elephant grass (Pennisetum purpureum Schum.) pasture. It was tested a variable grazing interval when it was observed an interception of 95% of active photosynthetic radiation by sward, and a 26-day fixed grazing interval. The experimental design was a complete randomized design with time repeated measurements. The interval of grazing, pre and post grazing sward heights, sward interception of active photosynthetic radiation and leaf area index were greater […]

The aim of this work was to evaluate the effect of bypass fat on milk production and composition in Bergamasca ewes. It was used 77 ewes which were distributed by parity and age orders in two groups: control diet (C): corn silage and concentrate; and bypass fat diet (GP): corn silage + concentrated + bypass fat (35 g/ewe/day) added in the concentrate. Diets were isoenergetic and isonitrogenous with 70% of total digestible nutrients and 16% of crude protein on dry […]

In order to evaluate not apparent relationships in individual studies, variables measured in nine experiments were analyzed in set. These experiments tested levels and sources of supplement for beef heifers, on cool-season cultivated pasture. Data were stratified in two groups: with and without concentrate supplementation. Forage mass and leaf blades on offer as well as sward structure (height and leave:stem ratio) were similar for both groups. Supplemented heifers consumed forage with lesser neutral detergent fiber levels and presented higher average […]