Crescimento e desempenho de linhagens de aves pescoço pelado criadas em sistema semi-confinado

Dourado, Leilane Rocha Barros; Sakomura, Nilva Kazue; Nascimento, Dáphinne Cardoso Nagib; Dorigam, Juliano César de Paula; Marcato, Simara Márcia; Fernandes, João Batista Kochenborger

doi:10.1590/s1413-70542009000300030

Cited by 23 publications

(14 citation statements)

References 4 publications

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“…It is noteworthy to mention that all the referred works used commercial feeds in the diet. Studies with commercial strains, on the other hand, show a wide range of adult weights, most of them larger than those presented in this study for the autochthonous breeds, reflecting the improved rearing conditions (especially nutritional) and genetic selection (Mignon-Grasteau et al, 1999;Aggrey, 2002;Dourado et al, 2009).…”

Section: Resultscontrasting

confidence: 55%

Growth and Carcass Traits of Three Portuguese Autochthonous Chicken Breeds:Amarela, Preta LusitânicaandPedrês Portuguesa

Soares

Lopes

Brito

et al. 2015

Italian Journal of Animal Science

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The purpose of this study was to estimate the growth curve parameters and carcass traits yields of three Portuguese autochthonous chicken breeds, Amarela (AM), Preta Lusitânica (PL) and Pedrês Portuguesa (PP). Birds (198) were individually weighed at pre-established time intervals (6682 records) and the study period lasted 30 months. The growth data were fitted to a mixed nonlinear model based on the Gompertz growth function. Fixed effects were breed, sex, lot, temperature and photoperiod. The adult weight estimated for males (females) were 2851.3 (1951.6) g for AM, 3047.5 (2147.7) g for PL, and 3243.7 (2344.0) g for PP, respectively. The males (females) estimated maximum daily growth were 22.7 (18.1) g at 77 (69) days for AM, 20.7 (17.5) g at 79 (72) days for PL, and 18.1 (16.3) g at 82 (74) days for PP, respectively. Within breed the males were heavier than females at 365 days but with lower maturity rates. Yields of carcass and noble meat pieces were evaluated on data collected from 10 males of each breed, sacrificed at 240 days. Traditionally, these breeds are commercialised whole and again the PP had the heaviest carcass with the highest yield. Growth of these autochthonous breeds after 240 days was minimal and may justify the decrease of the traditional slaughter age of approximately one year, in order to increase profitability. Establishing special market niches will also be a valuable complement for the rural economy of Portugal and an important contribution to the conservation of this genetic heritage.

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Section: Resultscontrasting

confidence: 55%

Growth and Carcass Traits of Three Portuguese Autochthonous Chicken Breeds:Amarela, Preta LusitânicaandPedrês Portuguesa

Soares

Lopes

Brito

et al. 2015

Italian Journal of Animal Science

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“…Dourado et al (2009) observed lower mortality rate in free-range broilers (0.02%) than that recorded in the present study. Median culling rate was extremely low (0.0%, 0.0-2.2%; Table 3).…”

Section: Evaluation Of Free-range Broilers Using the Welfare Quality®contrasting

confidence: 86%

Evaluation of Free-Range broilers using the welfare quality® protocol

Sans

Federici

Dahlke

et al. 2014

Rev. Bras. Cienc. Avic.

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Scientific information on the welfare of broilers reared in alternative systems is scarce. The objective of this study was to assess the welfare of free-range broilers using the Welfare Quality® protocol. Free-range broilers reared in ten farms were observed, and measures were made in broilers of five of these farms. The collected data were transformed into scores (0-100), with higher scores indicating better welfare, except for emotional states. Prevalence percentages were calculated for the remaining data. Median (min-max) scores were 81 (63-98) for lameness, 93 (83-99) for hock burn on the farm, 100 (95-100) for plumage cleanliness, 35 (8-70) for podermatitis on the farm, 56 (26-88) for density, 53 (20-53) for dust, 34 (14-67) for litter quality, 93 (41-100) for drinkers, and 100 (100-100) for birds panting or huddling on the farm. The following average (min-max) prevalence percentages were obtained: total mortality 2.0% (1.4-7.2%), culling 0.0% (0.0-2.2%), feed withdrawal time 875 min (715-945 min), water withdrawal time 220 min (170-275 min), dead on arrival at the processing plant 0.00% (0.00-0.01%), broken wings 0%, (0-0%), inefficient stunning 3.9% (1.3-6.7%), pre-stun shock 49.3% (26.7-56.8%), hepatitis 4.5% (1.8-11.0%), bruising 9.3% (6.7-16.7%), and ascites 0% (0-0%). The negative broiler welfare points detected were pododermatitis, litter quality, density, dust, culling, feed withdrawal time, inefficient stunning, pre-stun shock, and hepatitis. The positive points identified were the absence of birds panting or huddling on the farm; low prevalence of lameness, hock lesions, dead on arrival, broken wings, and ascites; good plumage cleanliness scores, and short water withdrawal time.

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“…The results obtained for the difference between the performance of males and females in the present research are in agreement with those reported in the literature. Dourado et al (2009) andDel Castilho et al (2013) also found no significant effect only on feed conversion until 21 and 28 days of age, respectively. Santos et al (2005) found that the growth rate and feed conversion of males and females of slow-growth lines are similar until 21 days of age and start to differ after the 28th day.…”

Section: Resultsmentioning

confidence: 93%

“…Santos et al (2005), Takahashi et al (2006), Dourado et al (2009), andDel Castilho et al (2013) found that there was no significant difference in carcass yield between the sexes, but breast yield was higher for females and drumstick+thigh yield was higher in males. Higher relative weight of abdominal fat in females was observed by Santos et al (2005) and Campello et al (2009).…”

mentioning

confidence: 99%

Inclusion of Annatto Seed by-Product in Diets Containing Sorghum for Slow-Growth Broilers

et al. 2015

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Sorghum is used as a source of energy alternative to corn, however, its low pigments content are considered hindrance to the use of this feedstuff for poultry. The inclusion of annatto seed by-product (ASB) may solve this problem. In this context, the objective of this study was to evaluate the effect of ASB inclusion in diets containing sorghum as the main source of energy on performance, carcass traits, meat color, and economic viability in the production of slow-growth broilers. A total of 420 sexed chicks of the Carijó Pesadão line were distributed in a completely randomized design according to a 2 × 7 factorial arrangement, with three replicates of 10 birds per treatment. Studied factors were two sexes (males and females) and seven diets, wherein one had corn as source of energy and the others contained sorghum plus inclusion of 0, 3, 6, 9, 12, and 15% of ASB. Irrespective of the sex, diets did not affect feed intake (g/bird), feed conversion (g/g), yields (%) of carcass, breast and drumstick+thigh, percentage of abdominal fat, or relative weight of the liver. However, the inclusion of ASB influenced the color parameters of the meat making it more pigmented and improved the economic viability parameters. In diets for slow-growth birds containing sorghum as the main source of energy, ASB can be included up to 15%, and meat pigmentation problems can be reduced with total substitution of corn by sorghum with inclusion of ASB from 3%.Index terms: Alternative feedstuff; weight gain; natural pigment. RESUMOO sorgo é utilizado como fonte de energia alternativa ao milho, no entanto, seu baixo teor de pigmentos é considerado entrave na utilização desse ingrediente para aves. A inclusão do resíduo da semente do urucum (ASB) pode solucionar esse problema. Nesse contexto, objetivou-se avaliar o efeito da inclusão do ASB em rações contendo sorgo como principal fonte de energia sobre o desempenho, características de carcaça, coloração da carne e viabilidade econômica na produção de frangos de corte de crescimento lento. Foram utilizados 420 pintos sexados da linhagem carijó pesadão, distribuídos em delineamento inteiramente casualizado, segundo o esquema fatorial 2 × 7, com 3 repetições de 10 aves por tratamento. Os fatores estudados foram 2 sexos (machos e fêmeas) e 7 rações, sendo uma ração composta por milho como fonte de energia e as demais contendo sorgo e a inclusão de 0; 3; 6; 9; 12; e 15 % do ASB. Independente do sexo, as rações não influenciaram o consumo de ração (g/ave), ganho de peso (g/ave), conversão alimentar (g/g), rendimento (%) de carcaça, peito, coxa+sobrecoxa, porcentagem de gordura abdominal e peso relativo do fígado. Entretanto, a inclusão do ASB influenciou os parâmetros de cor da carne, tornando-a mais pigmentada, e melhorou os parâmetros de viabilidade econômica. Em rações para aves de crescimento lento contendo sorgo como principal fonte de energia, pode-se incluir até 15% do ASB, sendo possível reduzir os problemas de pigmentação da carne, em decorrência da substituição total do milho p...

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Crescimento e desempenho de linhagens de aves pescoço pelado criadas em sistema semi-confinado

Cited by 23 publications

References 4 publications

Growth and Carcass Traits of Three Portuguese Autochthonous Chicken Breeds:Amarela, Preta LusitânicaandPedrês Portuguesa

Growth and Carcass Traits of Three Portuguese Autochthonous Chicken Breeds:Amarela, Preta LusitânicaandPedrês Portuguesa

Evaluation of Free-Range broilers using the welfare quality® protocol

Inclusion of Annatto Seed by-Product in Diets Containing Sorghum for Slow-Growth Broilers

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