Performance, Growth Curves and Carcass Yield of Four Strains of Broiler Chicken

Abstract

Broiler chicken genetics, gompertz, viscera yield.

Influence of incubation, diet, and sex on avian uncoupling protein expression and oxidative stress in market age broilers following exposure to acute heat stress

“…Independent of AHS, males exhibited a higher expression of avUCP, which may have been driven by the increased TBARS concentrations also noted in males as compared to female birds. Males have been shown to exhibit a greater susceptibility to oxidative stress, which has been proposed to arise from their rapid growth rate and heavier BW when compared to female broilers ( Brothers et al, 2019 ; Nogueira et al, 2019 ). As free radical production is a normal product of increased mitochondrial activity ( Hensley et al, 2000 ), male broilers may potentially generate higher levels of ROS than their female counterparts under standard conditions due to their increased metabolic rate ( Meltzer, 1983 ).…”

“…Because genetic selection for rapid growth has amplified sexual dimorphism in modern broilers, studies must consider the influence of bird sex during hyperthermia ( Zuidhof et al, 2014 ; Nogueira et al, 2019 ). The higher growth rate in male broilers may inadvertently increase ROS production, contributing to observations of heat stress susceptibility in males ( Cahaner and Leenstra, 1992 ; Settar et al, 1999 ) Brothers et al (2019) .…”

Precision Livestock Farming IT Support Model for the Poultry Industry

“…Accurate information on live weight and coefficient of variation (V%) is essential to ensure that the maximum number of birds falls within the desired weight. Some of the recent studies ( [11] and [13]) allow to assess the weight growth dynamics (see Figure 3) and potential uniformity within the herd (Table 3). According to [11], measured by the coefficient of variation (the standard deviation/average body weight multiplied by 100), the greater the number, the more variable the weight of the herd body.…”

The Relationship between Performance, Body Composition, and Processing Yield in Broilers: A Systematic Review and Meta-Regression

“…Consequently, better quantifying the association between performance, body composition, and processing yield will support production professionals, nutritionists, and researchers to make decisions and better understand the underlying processes involved in productive and economic efficiency. Most studies on the relationships between these variables have focused on comparing genetic lines [ 7 ] or determining individual variations within the same genetic line [ 8 , 9 ]. Indeed, negative phenotypic and genotypic correlations have been reported between FCR and body weight gain (BWG) when the intra-genetic line variability was explored in individual birds [ 10 , 11 ].…”