Finishing precocity visual score selection was adopted to estimate the time from birth to reach slaughter age. This study estimated (co)variance components and genetic correlations for the finishing precocity score at weaning (WP) and yearling (YP) stages by using daily weight gain (BWG = from birth to weaning; WYG = from weaning to yearling) and speed of weight gain (BWR = from birth to weanin...

A semi-field study was carried out to evaluate the effect of two medicinal herbs, individually and in combination, on growth performance, carcass traits, nutrient digestibility and immune response of broiler chickens.  A total of 384 one-day-old straight-run Arbor Acres broiler chickens were allocated into 24 floor pens prepared in a commercial broiler house. Pen-groups were fed one of the foll...

INTRODUCTION The demand for high quality meat and the competition with other protein sources imposes the introduction of new technologies in the Brazilian beef cattle system of production. Most of breeding evaluation programs in Brazil, have given emphasis to records of weights and scrotal circumference (SC) at different ages, ignoring carcass traits (CT) and other growth traits. Carcass traits...

This study was carried out to evaluate the effects of selection criteria for post-weaning daily gain (PWDG) and early sexual heifer precocity (PP14) on performance, carcass traits meat quality Nellore bulls. In year one, 50 animals were selected according their expected progeny differences (EPDs) PWDG grouped as high (HG) or low (LG) groups. two, EPD PP14 also (HP) (LP). After slaughter, sample...

The possibilities for registrations and the corresponding costs are steadily increasing. We need to treat registrations and the use of Decision Support Systems (DSS) as a production factor in line with feed. The quality or utility value of a registration can be measured on the improvement in decisions. In order to do this we need, however, to define and categorize the decisions made in pig prod...

Forty-eight male crossbred (Large White-Landrace) pigs were used in a 2×2 factorial design to determine the effect of pre-slaughter handling (minimal and negative handling prior to slaughter) and the rate of carcass processing post-slaughter [normal rate (45min) and delayed rate (70min) from time of exsanguination to carcass entering the chiller] on muscle glycolysis and pork quality. Pigs nega...

A total of 120 crossbred [synthetic line x (Large White x Landrace)] pigs (castrated males and females) were used to evaluate the influence of rearing conditions for growing-finishing pigs on growth performance, carcass, stress reactions at slaughter, and meat eating quality. At approximately 35 kg of live weight (LW), littermates were allocated to either a conventional (fully slatted floor, 0....

The aim of this study is to determine the hatching characteristics, growth performance and slaughter-carcass traits Japanese quails obtained from quail eggs divided into four classes (G1: less than 8 g, G2: between 8-10 G3: 10-12 G4: heavier 12 g) according egg size. animal material consisted chicks (60 birds were used in each group) a total 525 simultaneously parent flock (random mated, not pr...