Comparison of free range broiler chicken strains raised in confined or semi-confined systems

By A. Santos, N. Sakomura, E. R. Freitas, C. Fortes, Envm Carrilho. 2005

97 citations recorded by the source corpus.

The present study was carried out to compare the growth curve, performance and carcass yield of two broiler strains, Paraiso Pedres (PP) and ISA Label (ISA), raised in confined or semi-confined systems. It was used a completely randomized design with five replicates, consisting of 20 and 29 birds in semi-confined and confined systems, respectively. Semi-confined birds had free access to pasture at 28 days of age. Performance data were recorded weekly by building growth curves as well as calculating the growth rate. After reaching the recommended body weight (2.5 kg), male birds were slaughtered for physicochemical analysis of carcass, parts and organs. Semi-confined PP and ISA birds showed higher growth potential, higher weight gain, lower feed intake and better feed-to-gain ratio than confined birds. No interactions were observed for carcass yield and meat quality characteristics. Males presented higher yields of feet, drumstick, thigh, drumstick + thigh, and heart, while females presented higher breast and abdominal fat yield. Breast meat from ISA Label birds was more yellowish than from PP, whereas less soft meat was observed in semi-confined birds.

Subfields: Animal Science and Zoology

View Paper: https://www.semanticscholar.org/paper/d300f4d7aabba4030c9b0d68ee030b297b355e70

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N. Ö. Narinç
A. Aygün
T. Majewska
M. Mikulska
J. Jankowski
D. Mikulski
D. Narinç
J. Celej

Citations in the corpus

Growth curve analyses in poultry science (2017, background): “Santos et al. (2005), Narinç et al. (2010c), and Eleroğlu et al. (2014) performed analyses for growth data of slowgrowing broiler lines reared in indoors, semi-extensive and organic systems, respectively.”
Growth Performance, Carcass Traits and Meat Quality of Slower-growing and Fast-growing Chickens Raised with and without Outdoor Access (2011, background): “The meat of the SG birds was more yellow than that of the FG birds (p<0.05), which agrees with other findings (Fanatico et al., 2005; Santos et al., 2005).”