Growth and carcass characteristics of different crosses of broiler chickens reared under an alternative system / Características de crescimento e carcaça de diferentes cruzamentos de frangos criados em sistema alternativo
Cruz, Fábio Loures; Saraiva, Lorena Katheryne Vieira; Silva, Grace Ellen; Nogueira, Tatiane Mendonça; Silva, Ana Paula; Faria, Peter Bitencourt.
Semina ciênc. agrar
; 39(1): 317-328, jan.-fev. 2018. tab
Artículo
en Inglés
| VETINDEX | ID: biblio-1501063
This study aimed to assess the effect of different breeds and crosses of broiler chickens and sex on growth, carcass characteristics, and tissue composition. The experimental design was a completely randomized design in a 6 × 2 factorial scheme, with six genotypes (New Hampshire NHS, Jersey Black Giant JBG, Rodhe Island Red RIR, Indigenous Giant IG, and the hybrids IG × NHS and IG × JBG) and two sexes (male and female). Each treatment was composed of five replications with three broiler chickens, totaling 180 broiler chickens. Zootechnical performance and growth were assessed through the Gompertz equation parameters. After slaughtering at 105 days, the characteristics of carcass and main cuts were determined by means of weight, yield, and proportion of tissue constituents (meat, bone, and skin). Regarding the Gompertz equation parameters, the genotype NHS presented a higher growth potential. Males presented higher live weight and carcass weights, except for IG. No difference was observed between genotypes and sexes (P > 0.05) for carcass yield. The genotype JBG presented the highest average for breast yield (24.4%). Males presented the highest average for leg yield (30.5%). The genotype IG presented the highest value of breast meat yield (71.2%), being similar to the genotypes from the crosses IG × NHS, and IG × JBG (68.9 and 68.3%, respectively). For meat to...
Biblioteca responsable:
BR68.1
Ubicación: BR68.1
Texto completo
Documentos relacionados