Body weights, carcase characteristics, organ weights, abdominal fat, and lipid content of liver and carcase in two lines of Japanese quail (<i>Coturnix coturnix japonica</i>), unselected and selected for four week body weight

Oğuz, İsmail; Altan, Özge; Kırkpınar, Figen; Settar, Petek

doi:10.1080/00071669608417888

Cited by 30 publications

(38 citation statements)

References 19 publications

(52 reference statements)

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“…Similar results have been reported by Oguz et al (1996). Therefore the growth data in all three lines were analyzed without considering the sexual dimorphism.…”

Section: Discussionsupporting

confidence: 55%

Evaluation of Growth Functions on Japanese Quail Lines

et al. 2013

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The aim of present study was to fit the best predictive equation to describe the growth curve of different Japanese quail lines. Moreover the effect of short-term divergent selection on the growth curve parameters was investigated. The quail lines utilized in the current study were two divergently selected lines for high (HW) and low (LW) 4-wk body weight (BW) and a control line (C). Determination and adjusted determination coefficients, relative error mean and standard deviation, mean square error, Akaike's information criteria and Schwarz Bayesian information criteria were used to evaluate the accuracy of prediction with the growth functions of Hyperbolastic (H1, H2, H3), Richards, Gompertz, Logistic and Von bertalanffy. Based on model behavior and statistical performance, the Gompertz and Logistic functions were not able to show a suitable fit for all three lines. The overall goodness of fit statistics in the HW line showed that the Richards function has the best fit to the data followed by H3, H2, H1, Von bertalanffy, Gompertz and Logistic functions, respectively. The overall results in the LW and C lines were similar to the HW line, except that Logistic function provided a better fit to the data than Gompertz. The study of growth pattern using Richards function revealed that short-term divergent selection altered the growth trajectory of selected lines through the changing of shape parameters and relative intensity of growth rates.

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“…Similar results have been reported by Oguz et al (1996). Therefore the growth data in all three lines were analyzed without considering the sexual dimorphism.…”

Section: Discussionsupporting

confidence: 55%

Evaluation of Growth Functions on Japanese Quail Lines

et al. 2013

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“…Diversos autores constataram diferenças de peso entre linhagens de codornas selecionadas para corte (Lepore & Marks, 1971;Campion et al, 1982;Baumgartner et al, 1985;Caron et al, 1990;Marks, 1993;Oguz et al, 1996), ao observarem variações de 113,4 g até 217,0 g aos 56 dias de idade. Nestor et al (2002), estudando o efeito da seleção para aumento de ganho de peso em seis linhagens de codornas japonesas, obtiveram valores para machos e fêmeas, respectivamente, às quatro semanas, de 213,1 e 225,0 g. A conversão, a eficiência alimentar e o ganho de peso são significativamente afetados pela linhagem ou variedade das aves (Panda et al, 1987;Marks, 1991;1993;Ardiningsasi et al, 1992;Michalska & KorzynskaNowak, 1992;Steigner et al, 1992).…”

Section: Introductionunclassified

“…Caron et al (1990) salientam que machos mais pesados produzem carcaças mais pesadas, enquanto fêmeas mais pesadas são aquelas mais maduras sexualmente, por isso, possuem aparelho reprodutivo mais pesado. Oguz et al (1996) relatam que, em razão do dimorfismo sexual durante o período de crescimento em aves, machos possuem peso maior que fêmeas. Entretanto, em codornas, as fêmeas são mais pesadas que os machos, diferença que ocorre por volta da terceira e quarta semana de idade, sendo atribuída pelo peso dos ovários e fígado.…”

Section: Introductionunclassified

Desempenho e rendimento de carcaça de quatro grupos genéticos de codornas para produção de carne

et al. 2005

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RESUMO -Para avaliar o desempenho e rendimento de carcaça de quatro grupos genéticos de codornas de corte de 1 a 42 dias de idade, foram utilizadas 1.200 codornas distribuídas em delineamento inteiramente casualizado com quatro tratamentos (A, B, C, D) e cinco repetições de 60 aves por parcela. Uma vez por semana as aves foram pesadas para avaliação do ganho médio de peso e consumo médio de ração, além do registro da mortalidade. Aos 42 dias de idade, foram identificados e abatidos 10 machos por parcela, para avaliação do rendimento de carcaça e dos cortes cárneos. No período 1 a 42 de idade, o grupo genético C apresentou maiores peso e ganho médio de peso que os demais grupos. Contudo, para consumo médio de ração, conversão alimentar e mortalidade, não foram observadas diferenças entre os grupos genéticos. Para peso vivo, peso de carcaça, rendimento de carcaça e porcentagem de peito, não foram encontradas diferenças estatísticas entre os grupos genéticos. Para porcentagem de asa, coxa e carne de peito, o grupo genético D apresentou maior valor que os demais grupos. Considerando os resultados obtidos, os grupos genéticos de codornas para produção de carne utilizados no Brasil apresentam diferenças no seu desempenho produtivo e nos cortes cárneos.Palavras-chave: abate, carne de codornas, desempenho, grupo genético, rendimento de carcaça Performance and Carcass Yield of Four Quail Genetic Groups Selected for Meat ProductionABSTRACT -The study aimed to evaluate the performance and carcass yield of four quail genetic groups male and females. The birds were grown until 42 days old. A thousand and two hundred day old quails were distributed in a completely randomized design with four treatments (A, B, C and D) and five replicates of 60 birds each. The birds were weighed once a week in order to evaluate weight gain and feed consumption. Mortalities were recorded daily. At 42 days, ten male quails from each replicate were identified and slaughtered to evaluate the yield of carcass and parts. In the period from 1 to 42 days, genetic group C showed higher values of body weight. Group C showed the higher values for weight gain in the period from 1 to 42 days. No differences concerning the results of feed consumption, feed efficiency, mortality, body weight, carcass weight, carcass yield and breast percentage were observed among the groups. Genetic group D showed higher values for wings, legs and breast meat percentage. It was concluded that there are differences of performance and carcass and parts yield among the quail genetic groups selected for meat production presented on Brazilian market.

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“…The same can be observed in this study, in which females of the three strains presented higher weights at maturity when compared to males of their respective strains. Males are heavier than females in most poultry species, but for quail, females are heavier than males and the difference start being relevant from 21 to 28 days of age, when the ovaries grow and the liver increases in size (OGUZ et al, 1996). This difference in body development between genders results in changes in nutritional requirements, demanding a different management regarding gender and strain for the improvement of zootechnical indices and an increased production profitability (GRIESER, 2012).…”

Section: Resultsmentioning

confidence: 99%

Growth curves in meat-type and laying quail: a Bayesian perspective

Rossi

Grieser

Conselvan

et al. 2017

SCA

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The aim of this study was to assess the goodness of fit for nonlinear models, using the best model to describe body growth curves, comparing the parameters obtained for gender and one meat-type (Coturnix coturnix coturnix) and two laying (Coturnix coturnix japonica) quail strains, as well as nesting via MCMC (Markov chain Monte Carlo processes) methods under a Bayesian approach. A total of 1,350 one-day-old mixed quail were used: 400 of meat-type, 450 of yellow laying, and 500 of red laying strains distributed in a completely randomized design with three treatments (each treatment corresponded to one strain) and five replications. The experimental period consisted of 1 to 42 days of age. At 21 days of age, quail sexing was performed by means of sexual dimorphism, being individually identified at one day of age with numbered rings, allowing determining growth curves by gender. Birds were reared in a conventional system, fed ad libitum with diets formulated to meet nutritional requirements. Body weight was determined weekly and assessed using nonlinear models: Logistic, Brody, Von Bertalanffy, and Gompertz. DIC (Deviance Information Criterion) criterion was used to select the best nonlinear model, i.e. the lower the DIC value is, the better the model goodness of fit to the data. Gompertz model was better adjusted to the data regardless the gender or strain. Meat-type quail had the highest asymptotic weights and the highest age at which growth rate was maximum, followed by red and yellow strains. All nestings presented significant differences (p < 0.05) between gender for contrasted parameters. Meat-type, yellow, and red females presented values significantly (p < 0.05) higher for asymptotic weight (370, 203, and 215 g, respectively) when compared to males (274, 131, and 143 g, respectively), which were earlier in body growth. Key words: Deviance information criterion. Gompertz equation. Nonlinear models. Body weight. ResumoO objetivo deste trabalho foi avaliar a qualidade de ajuste dos modelos não lineares aos dados, utilizando o melhor modelo para descrever as curvas de crescimento corporal, comparando os parâmetros obtidos para gênero e uma linhagem de codornas de corte (Coturnix coturnix coturnix) e duas de postura (Coturnix coturnix japonica), bem como o aninhamento, via método MCMC (Cadeias de Markov em processos de Monte Carlo), sob o enfoque Bayesiano. Foram utilizadas 1.350 codornas mistas, com um dia de idade, sendo: 400 da linhagem de corte, 450 de postura amarela e 500 de postura vermelha, distribuídas por um delineamento inteiramente casualizado, com três tratamentos (cada tratamento corresponde a uma linhagem) e cinco repetições. O período experimental foi de 1 a 42 dias de idade. Aos 21 dias de idade foi realizada a sexagem por dimorfismo sexual, sendo que elas foram identificadas individualmente com um dia com anilhas numeradas, possibilitando a determinação das curvas de crescimento por gênero. As aves foram criadas em um sistema convencional, alimentadas ad libitum com rações formuladas p...

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Body weights, carcase characteristics, organ weights, abdominal fat, and lipid content of liver and carcase in two lines of Japanese quail (Coturnix coturnix japonica), unselected and selected for four week body weight

Cited by 30 publications

References 19 publications

Evaluation of Growth Functions on Japanese Quail Lines

Evaluation of Growth Functions on Japanese Quail Lines

Desempenho e rendimento de carcaça de quatro grupos genéticos de codornas para produção de carne

Growth curves in meat-type and laying quail: a Bayesian perspective

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