Carcass and parts yield of broilers reared under a semi-extensive system

Abstract

An experiment was carried out to evaluate carcass traits of male and female broilers of two genetic strains (Paraíso Pedrês and Pescoço Pelado), slaughtered at 65, 75, 85 and 95 days of age, and reared under a semi-extensive production system. The following parameters were evaluated: body weight at slaughter (BWs), carcass weight (CW), carcass yield (CY), parts yield, including breast, drumstick, thighs, back, neck, feet, wings, abdominal fat pad (AF), and giblets (gizzard, heart, liver). Paraíso Pedrês males presented higher BWs and CW. Paraíso Pedrês females had higher breast yield. Thighs and drumstick yields were higher in Pescoço Pelado males. Back yield was similar at 85 and 95 days of age, wing yield declined with age. AF yield was higher in Paraíso Pedrês and in females. GY was affected by sex and slaughter age. The results of this work lead to the conclusion that Paraíso Pedrês males reach higher live and carcass weights at 85 and 95 days of age, and that breast yield is higher in this strain. On the other hand, Pescoço Pelado males present higher drumstick and thighs yields. Therefore, the choice of genetic strain, sex and slaughter weight will determine carcasses with different parts yield

Light emitting diode (LED) use in artificial lighting for broiler chicken production

“…Males showed higher thigh + drumstick (29.36%) compared to females (28.36%). A factor that affect carcass yield is the bird sex, because males have larger number of muscle fibers than females, resulting in higher thigh + drumstick yield (FARIA et al, 2010). As noted by CAO et al (2012), LED monochromatic light combinations (green and blue) compared to a single light type use can increase broiler body, carcass, breast, and thigh weights and decrease feed conversion; thus, improving growth and yield performance.…”

A step toward regionalized scale‐consistent agricultural life cycle assessment inventories

“…Data were grouped per agrarian region and per NUTS II region. Animal carcass yields were divided in several types: cattle (Ledic et al 2000), swine (Costa 2015), lamb and kid (ovine) (Santos et al 2008), adult ovine (Xenofonte et al 2009), adult caprine (Bezerra et al 2012), hens (Faria et al 2010), turkey (Castro et al 2014), duck (George et al 2014(George et al ), quail (M ori et al 2005, and rabbit (Pinheiro et al 2011). At the INE database, the units for crops and dairy products' yield are kg per year and for livestock are kg carcass per year However, WBLDB (Nemecek et al 2014) suggests fat-and protein-corrected milk (FPCM) per year, which we calculated according to the International Dairy Federation's formula (IDF 2009).…”

Slaughter traits and skin colour of newly crossed chicken broilers dedicated for extensive rearing system as a criterion of product identification and meat quality

“…Many studies have focused on production results and poultry meat quality depending on the genotype of birds and their housing conditions (Havenstein et al, 1994;Bogosavljević-Bošković et al, 2006a, 2006bFaria et al, 2010). The usefulness of typical meat-type broiler hybrids to less intensive systems of rearing, as well as good productivity and meat quality of local breeds hybrids, due to their ability to adapt to variable environmental conditions were confirmed (Fanatico et al, 2005(Fanatico et al, , 2006Rizzi et al, 2007;Połtowicz & Doktor, 2011).…”