This study evaluated body development and reproductive performance of beef cows whose calves were submitted to early weaning (76 days of age), or conventional weaning (148 days of age). It was used 141 Braford cows that calved in 2004, 2005, and 2006 to evaluate weight at calving at 76 days, weight at calving at 148 days, weight at the beginning and end of the breeding season, variation of the average daily weight, body condition, pregnancy rate, and calving interval. Dams […]

The objective of this paper was to study subcutaneous fat thickness, loin eye area, length and maximum depth measurements of the longissimus dorsi muscle between the 13th rib and the 1st lumbar vertebra determined by ultrasound examination and on the carcass of discard ewes slaughtered in different physiological stages, besides correlation and determination coefficients among measurements evaluated. It was used 21 Santa Ines ewes distributed into the following treatments: EL = ewes that remained in lactation for 60 days with […]

This experiment was conducted to evaluate the effect of including defatted corn germ meal in diets for laying hens. It was assigned two hundred and forty laying hens to a randomized design, with six diets and five replicates of eight hens per diet. Experimental diets were formulated by inclusion of defatted corn germ meal at 0, 6, 12, 18, 24 and 30% level. The period experiment was carried out for four 28-day cycles and performance (feed intake, egg production, egg […]

Aiming to evaluate the effect of tomato waste inclusion on productive performance and characteristics of carcass and main broiler chicken cuts, an experiment was carried out using 300 male Cobb chicks, distributed in a complete randomized design, with five rations and five replicates. Diets consisted of control ration based on corn and soybean meal and four rations with 5, 10, 15 and 20% of tomato waste. Feed intake, weight gain and feed conversion and, at the end of experiment, slaughter […]

The aim of this study was to evaluate the inclusion of an enzimatic complex in diets for Nile tilapia (Oreochromis niloticus) on performance, carcass chemical composition as well as water quality. The experiment was performed in 62 days. It was used two hundred reverted fingerlings (14.57 ± 1.24 g) distributed in a complete randomized design in 20 500 L-tanks with four treatments and five replicates, considering a box with 10 fish as a experimental unit. The fish were fed diets […]

The current study was aimed at investigating the use of different fertilizers – dicalcium phosphate, biosolid and quail feces – as a strategy for water fertilization in Daphnia sp production. It was used twenty-four 100-L tanks of asbestos cement distributed in a completely randomized split-plot design with six replicates, with plots in the three kinds of fertilizers (biosolid, dicalcium phosphate, and quail feces) and a control without fertilization (WF) and subplots at the times of assessment (days 8 and 13). […]

This study aimed at evaluating the accuracy, precision and robustness of in vivo dry matter apparent digestibility estimates (DMAD), using as markers indigestible acid detergent fiber, indigestible neutral detergent fiber, acid detergent lignin, indigestible acid detergent lignin and chromic oxide in comparison to the fecal total collection. Eighteen wethers (56.5 ± 4.6 kg BW) were randomly assigned to diets containing 25, 50 or 75% of concentrate and Coast cross hay for 25 days. Feces were collected during the five days […]

The objective of this study was to evaluate alternatives for modeling the interaction between age of dam at calving (AOD) and the dam genetic group (DGG) on the weaning weight (W225) of Charolais-Zebu (Ch-Z) crossbred calves. Data from 56,965 crossbred calves were analyzed by the least square method. Regression coefficients for age of dam at calving were estimated nested into each class of the dam genetic group (CLA model); for age of dam at calving × dam Charolais percentage (age […]

A total of 292 animals from three breeds (Alpine and Saanen dairy breeds, and the Brazilian naturalized breed Moxotó) were genotyped, comprising 276 paternity cases. Statistical analyses were carried out by using TFPGA and CERVUS programs. Heterozygosis ranged from 0.542 (ILSTS005) to 0.825 (INRA006), with an average of 0.717 for all loci. Polymorphic information content (PIC) was 0.676 and 0.542, and combined exclusion probabilities (EP) were 0.999591 and 0.988375 for known and unknown maternal genotypes, respectively. The microsatellite system reveals […]

This experiment was carried out to evaluate levels of crude protein and digestible arginine in pre-starter broiler ration and their effects on the performance of the broilers from 7 to 21 days of age. A total of 600 Cobb chicks was assigned to a block randomized design in a 4 × 2 factorial arrangement consisting of 4 levels of digestible arginine (1.363; 1.463; 1.563 and 1.663%) and two levels of crude protein (20 and 22%) with eight treatments, each one […]