Hatching weight in relation to egg weight in domestic birds

Shanawany, M. M.

doi:10.1079/wps19870008

Cited by 111 publications

(51 citation statements)

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“…O peso do pinto varia de 61,5 a 76% do peso do ovo (Shanawany, 1987). Assim, o uso de matrizes jovens resulta também na produção de pintos menos desenvolvidos, em maior mortalidade e pior desempenho (McNaughton et al, 1978;Wyatt et al, 1985;Hearn, 1986;Vieira & Moran Jr., 1998b;Vieira & Moran Jr., 1999).…”

Section: Introductionunclassified

Influência do peso inicial de pintos de corte sobre o desempenho e o rendimento de carcaça de frangos e a viabilidade econômica da produção

et al. 2006

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RESUMO -Este estudo foi realizado com o objetivo de avaliar o efeito do peso corporal ao primeiro dia de idade sobre o desempenho, o rendimento de carcaça e dos cortes e a viabilidade econômica da produção de frangos de corte. Foram utilizados 1.984 pintos AgRoss 308, machos e fêmeas, com diferentes pesos iniciais (32, 35, 40 e 49 g), distribuídos em um delineamento em blocos casualizados, em esquema fatorial com oito tratamentos (dois sexos x quatro pesos iniciais), quatro repetições e 62 aves por parcela. Os dados foram submetidos à análise de variância e as médias foram comparadas pelo teste Tukey a 5% para os diferentes pesos iniciais. Não houve interação significativa sexo × peso inicial do pinto. Os frangos machos apresentaram melhor desempenho em todos os tratamentos e períodos estudados. O peso inicial do pinto influenciou o peso vivo, o ganho de peso e o consumo de ração nos diferentes períodos de crescimento, além do índice de eficiência produtiva (pintos mais pesados apresentaram, aos 47 dias de idade, melhores resultados de desempenho), mas não alterou o rendimento de carcaça ou de partes. Quanto aos aspectos econômicos, pintos mais pesados proporcionaram maior rendimento econômico.Palavras-chave: frango de corte, desempenho, peso inicial, rendimento de carcaça Effect of broiler chicken initial weight on performance, carcass yield and economic viabilityABSTRACT -The objective of this study was to evaluate the effect of body weight (BW) of 1-d chicks on performance, yields of carcass and prime cuts and economic viability. One thousand, nine hundred and eight-four AGRoss 308 chicks (males and females) with different initial BW (32, 35, 40 and 49 g) were allotted to a randomized block design with a 2 x 4 (two sexes and four initial BW) factorial arrangement with eight treatments, four replicates and 62 birds per experimental per plot. Data were submitted to variance analyses and the means, compared by Tukey test (5%). No significant sex × chick initial BW interaction was observed. Males showed better performance than females in all treatments and periods. Treatment effect on body weight, weight gain and feed intake was noticed in all periods. It was also observed treatment effect on productive efficiency index (the heaviest chicks showed the best performance results at 47 days of age), but there was no effect on yields of carcass and prime cuts. Regarding the economic viability, the heavier chicks showed the best results.Key Words: carcass yield, initial weight, performance IntroduçãoNa indústria avícola, periodicamente, ocorrem crises na cadeia produtiva, como o caso da redução da oferta de pintos de um dia, com demanda cada vez maior. Essas crises, muitas vezes, são ocasionadas por reduções no alojamento de matrizes, plantéis de matrizes em início de produção ou problemas sanitários, que podem levar os produtores de ovos férteis e de pintos de um dia a otimizar ao máximo seus produtos por meio da seleção menos rigorosa tanto para o ovo como para o pinto.Por outro lado, a qualidade do pinto é muito imp...

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Section: Introductionunclassified

Influência do peso inicial de pintos de corte sobre o desempenho e o rendimento de carcaça de frangos e a viabilidade econômica da produção

et al. 2006

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“…Eggshell color is an external egg quality characteristic and may affect incubation results and chick performance (Shanawany, 1987). Shafey et al (2005) reported that high light intensity during incubation reduced the hatchability of light-brown and medium-brown eggs, but not of dark-brown eggsin laying hens.…”

Section: Introductionmentioning

confidence: 99%

Effect of Eggshell Color on the Egg Characteristics and Hatchability of Guinea Fowl (Numida Meleagris) Eggs

Eleroğlu

Yıldırım²,

Duman

et al. 2016

Rev. Bras. Cienc. Avic.

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“…Some researchers showed that a correlation between oneday-old chick weight and slaughter weight exists. Powell and Bowman (1964), Proudfoot and Hulan (1981) and Sklan et al (2003) found a positive relationship, whereas Gardiner (1973), Shanawany (1987), Wolanski et al (2003) and Tona et al (2004) found no relationship between the two parameters. Some researchers found a positive correlation between chick length and body weight at 42 days of age (Hill 2001;Meijerhof 2006;Molenaar et al 2008).…”

Section: Discussionmentioning

confidence: 83%

Quality assessment chicks from different hatcher temperatures with different scoring methods and prediction of broiler growth performance

Sözcü

İpek

2014

Journal of Applied Animal Research

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The aim of the current study was to determine the quality of chicks from different hatcher temperatures for the prediction of broiler growth performance. The hatcher temperatures were applied as follows: control (36.8-37.0°C), acute high hatcher temperature (38.8-39.0°C for 3 hours daily, 36.8-37.0°C in remaining time) and chronic high hatcher temperature (38.8-39.0°C). The chick quality was measured with Tona score, Pasgar score, chick-hatching weight, yolkfree chick weight and chick length. Whereas the chicks of control group were the highest quality with Tona and Pasgar methods, the chicks of the control and acute high temperature groups were better than the chronic high temperature group according to chick weight and yolk-free chick weight as chick quality indicators. Between days1 and 7, the relative growth was the highest in control group with a value of 373.0%. The correlations between chick weight on day 1 and Tona score, Pasgar score, chick weight, yolk-free chick weight and chick length were significant. The correlation between chick quality scoring methods and relative growth between days 1 and 7 was varied among the treatment groups. In conclusion, short-or long-term high hatcher temperatures affected one-day-old chick quality and first-week broiler growth performance.

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Hatching weight in relation to egg weight in domestic birds

Cited by 111 publications

References 15 publications

Influência do peso inicial de pintos de corte sobre o desempenho e o rendimento de carcaça de frangos e a viabilidade econômica da produção

Influência do peso inicial de pintos de corte sobre o desempenho e o rendimento de carcaça de frangos e a viabilidade econômica da produção

Effect of Eggshell Color on the Egg Characteristics and Hatchability of Guinea Fowl (Numida Meleagris) Eggs

Quality assessment chicks from different hatcher temperatures with different scoring methods and prediction of broiler growth performance

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