A digestibility trial was carried out to determine the dry matter (MS), gross energy (EB) and crude protein (PB) apparent digestibility coefficients (CD) for fish meal (FP), poultry by-products meal (FV), gluten meal (GM) and alchool spray dried yeast (LV) for Thai Nile tilapia fingerlings. A hundred sexually reverted fishes (average weight 37.6 ± 5.0 g) were assigned to two 500-L feeding tanks and two 150-L cylindrical tanks with conical bottom, to feces collection . CD analysis was performed by […]

The aim of this experiment was to test the effects of two extenders (Glucose 5% and Coconut Water) and two thawing rates (60ºC during 5 seconds and 50ºC during 10 seconds) for semen of Piracanjuba (Brycon orbygnianus, Vallencienens, 1849). A solution of NaHCO3 1% was used to activate motility. A factorial 2 x 2 was used to analyze the results on sperm motility and its duration, and the percentage of living sperm after thawing. The highest sperm motility values (74.17 […]

A feeding trial was carried out to evaluate nutrient gastrointestinal digestibility and transit velocity in tambaqui fed two species of fruits and two species of seeds incorporated in a reference diet. In the reference diet, 55% of the yellow corn grain was replaced, in equal proportions, by grounded meal prepared from the jauari (Astrocaryum jauari) and embaúba (Cecropia sp.) fruits, and from munguba (Pseudobombax munguba) and seringa barriguda (Hevea spruceana) seeds. Fifteen 250-L fiber cement tanks, with continuous water flow […]

The matrinxã, Brycon cephalus, native specie from the Amazonian Basin, shows good characteristics for farming. It is a migrating fish, being necessary an appropriate handling to induce its spawning. The objective of this work was to characterize the profile of plasma triiodotironina (T3) in matrinxã, during 16 months (October/97 to January/99), associated to the sexual maturation, besides testing T3 action associated to the carp pituitary extract in the induced reproduction. The experiment was carried out at the National Center of […]

In the present paper the chemical composition and digestibility of several Brachiaria brizantha and Brachiaria humidicola fractions were determined after 70 days of growth. The experimental design was completely randomized with five replications for each specie. According to the position, the harvested plants were subdivided into top, median and bottom fractions for leaves and median and basal fractions for stems. The concentration of neutral detergent fiber (NDF), crude protein (CP), lignin, p_coumaric acid, ferulic acid, neutral sugars (glucose, xylose and […]

A study was conducted in the Brazilian Cerrados to evaluate the performance of six tropical forage grasses (Brachiaria brizantha cv. Marandu, B. brizantha cv. MG-4, B. decumbens cv. Basilisk, Panicum maximum cv. Mombaça, Melinis minutiflora and Hyparrhenia rufa), associated or not with the tropical forage legume Stylosanthes guianensis cv. Mineirão, in a silvopastoral system with a clone of Eucalyptus sp. The forages were established in plots of 12 x 10 m, in the interrows of eucalypts, in a randomized block […]

An experiment was conducted using elephant grass (Pennisetum purpureum Schum.) cv. Cameroon, with the purpose of determining the quantitative and qualitative characteristics of effluent released, correlating this with levels of pressure and the quality of silage. The material with 13% of dry matter was ensiled in experimental plastic silos. The levels of pressure were: 356.67; 446.67; 531.33; 684.00 and 791.00 kg/m3. The effluent of silages with high moisture content was collected and measured during seven days. In silages with high […]

The biological nitrogen fixation (BNF) of five Arachis pintoi (BRA31534, BRA31828, BRA31796, BRA15121 E BRA30333) and two A. repens (BRA31801 e BRA31861) accessions, grown in a Dark Red Latosol prone to seasonal flooding was evaluated using the 15N natural abundance method (d15N). Stolons of each accession were planted in November 1999, in plots of 2.0 m by 2.0 m, with four replications allotted to randomized blocks. Plant mass above five cm was harvested in January 2000. There were significant differences […]

The innoculation of forages with lignocellulolytic fungi is an option for improving quality without adding chemical products. Substrate quality influences fungal activity and endproduct quality. The effects of four treatments (composting of whole hay, composting of chopped hay, soaking in cool water and soaking in hot water) on a Brachiaria decumbens hay were evaluated. The treatments were followed by innoculation with Pleurotus ostreatus fungus and incubation over 35 days, under controlled temperature. A completely randomized design with four replicates and […]

Records of 4959 lactation in 1985 to 1998 of 2414 Brown Swiss cows breed, daughters of 70 sires in 51 herds, were used to estimate the genetic trend for milk and fat yield adjusted for 305 days of lactation and mature age of cows (PL305ME and PG305ME). The genetic trend for sires was estimated using a linear regression of the breeding values of the sires to their daughters calving year, averaged to number of daughters in each calving year. The […]