Curvas de crescimento e de deposição dos componentes corporais em aves de postura de diferentes linhagens

-This study aimed to estimate the energy requirements for maintenance and gain of Japanese and European quails under growth housed in two rearing systems: floor pens and cages. To determine maintenance requirements, two experiments were conducted with birds housed in cages in environmental chambers (experiment 1) and in floor pens at room temperature conditions (experiment 2). The experimental design was completely randomized with four levels of feed supply (100, 75, 50 and 25%) and four repetitions. Energy requirements for maintenance were estimated by the comparative slaughter method through a feeding trial. In experiment 1, 64 Japanese and European quails per treatment were housed in cages of climatic chambers at 18, 24, and 28 °C, while in experiment 2, 352 quails per treatment were housed in floor pens at room temperature (26 °C). To estimate gain requirements, five slaughters were performed with quails receiving feed ad libitum and housed under controlled temperature of 18 °C (experiment 3). Prediction equations were obtained to estimate requirements for maintenance and gain of energy for the two genotypes of quails. The room temperature and breeding system affected the estimates of energy requirements for maintenance. The genotypes presented different estimates for maintenance and gain. Prediction models should be developed considering the room temperature and quails' genotypes.

show abstract

“…Similar results have been observed in broilers with higher heat production (Sakomura et al, 2003) compared with pullets (Neme et al, 2005).…”

Section: Resultssupporting

confidence: 88%

“…Similarly, Neme et al (2006) noted from studies on growth curves that fat deposition of light pullets tends to grow from 1 to 18 weeks of age, while water deposition decreases proportionately.…”

Section: Resultsmentioning

confidence: 74%

Energy requirement for maintenance and gain for two genotypes of quails housed in different breeding rearing systems

Filho

Silva

et al. 2011

R. Bras. Zootec.

View full text Add to dashboard Cite

show abstract

“…There are many nonlinear models that may be used to describe the growth, but Gompertz has been more recommended by many authors, and showed better adjustment (Pasternak & Shalev, 1994;Hancock et al, 1995;Gous et al, 1999;Sakomura et al, 2005;Neme et al, 2006;Marcato, 2010;Narinc et al, 2010;Finco et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Quality Adjusting of Nonlinear Models for Organs, Carcass and Body Components in Meat-Type (Coturnix Coturnix Coturnix) and Laying-Type (Coturnix Coturnix Japonica) Quail

Grieser

Furlan

Ribeiro

et al. 2017

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

The objective of this study was to evaluate the adjustment quality of nonlinear models to data organs growth, carcass and body components of meat-type (Coturnix coturnix coturnix) and japanese laying-type (Coturnix coturnix japonica) quail. A total of 1350 quails from one to 42 d old were distributed in a completely randomized design, with five replicates each. To determine the organs growth (gut, heart, liver and gizzard), carcass and body components (wing, thigh and drumstick, back and breast), two quails per repetition were slaughtered weekly. The data were evaluated in function of different nonlinear models (Logistical, Brody, Richards, Von Bertalanffy and Gompertz). All models studied adjusted the data, differing in adjustment quality. Brody model showed the best description of gut length to all treatments. For the data gizzard weight, heart, liver and gut, the models that best adjusted, presenting smaller residual mean square and numbers iterations were Gompertz and Logistical. The Gompertz, Logistic and Von Bertalanffy models were the most adequate to describe the thigh and drumstick growth, back and breast, and Gompertz models and Logistic to describe the wing growth and carcass, showing lesser number of iterations to achieve the convergence of date, as well as low residual mean square and squares sums of the regression residuals. The Gompertz model was the most appropriate to describe the organs growth and body components in meat-and laying-type quail when evaluated in growth phase.

show abstract

“…Recomenda-se, portanto, para o período pré-postura o fornecimento de dietas com níveis adequados de aminoácidos, cálcio e fósforo para atender às demandas fisiológicas e permitir adequado desenvolvimento do aparelho reprodutor (Hurwitz & Barr, 1971;Cunningham & Morrison, 1977;Garcia, 2003;Leeson & Summers, 2005;Manual de Poedeira Branca, 2009). Verificam-se também aumento do espaço pélvico, maior deposição de gordura peitoral e púbica e alterações no comportamento da ave (Satterlee & Marin, 2004;Neme et al, 2006). Para se obterem ovos maiores, deve-se preparar as aves para a postura, que aumenta a demanda de nutrientes (proteína, metionina e ácido linoleico), porém o consumo não cresce na mesma proporção (Summers & Leeson, 1983;Summers et al, 1991;Keshavarz & Jackson, 1992;Kwakkel, 1992).…”

Section: Introductionunclassified

“…Para se obterem ovos maiores, deve-se preparar as aves para a postura, que aumenta a demanda de nutrientes (proteína, metionina e ácido linoleico), porém o consumo não cresce na mesma proporção (Summers & Leeson, 1983;Summers et al, 1991;Keshavarz & Jackson, 1992;Kwakkel, 1992). De acordo com Neme et al (2006), entre 52 e 59 semanas de idade, a curva de crescimento da poedeira apresenta seu ponto de inflexão, reduzindo as taxas diárias de crescimento, mas é exatamente nesse período em que a composição corporal se torna importante pois influencia as exigências nutricionais e melhora seu desempenho.…”

Section: Introductionunclassified

Níveis de lisina digestível para poedeiras Lohmann LSL na fase de 16 a 25 semanas de idade

et al. 2011

View full text Add to dashboard Cite

RESUMO -Neste experimento foram avaliados os efeitos de níveis de lisina digestível no desempenho, no balanço de nitrogênio e na digestibilidade de extrato etéreo em poedeiras Lohmann LSL entre 16 e 25 semanas de idade. Foram avaliados quatro níveis de lisina digestível (0,6; 0,7; 0,8 e 0,9% da ração) utilizando-se 160 poedeiras durante o período de 16 até 25 semanas de idade. As dietas foram isonutritivas, com 17% de PB e 2.800 (pré-postura) e 2.750 kcal (pré-pico) EM/kg. O delineamento inteiramente casualizado foi adotado com quatro níveis de lisina digestível avaliados em quatro repetições. Os níveis de lisina digestível não influenciaram o ganho de peso, os consumos de ração e de proteína e energia, a idade ao primeiro ovo, a produção e o peso dos ovos, os índices de conversão alimentar, a massa do ovo e os balanços de nitrogênio e extrato etéreo. Houve aumento linear positivo do consumo de lisina de acordo com os níveis dietéticos de lisina digestível. Os níveis de lisina utilizados não interferem no desempenho nem no balanço de nutrientes. Sugere-se o uso de 0,6% de lisina por quilograma de ração. Palavras-chave: aminoácido essencial, consumo, frangas, produção de ovos Digestible lysine levels for Lohmann LSL hens 16 to 25 weeks of ageABSTRACT -In this experiment, the effects of digestible lysine levels on performance, nitrogen balance and fat digestibility in Lohmann LSL hens 16 to 25 weeks of age were evaluated. Four levels of digestible lysine (0.6, 0.7, 0.8 and 0.9% in ration) were assessed by utilizing 160 16-year-old laying hens 16 to 25 weeks of age. The diets were isonutritive with 17% CP and 2800 (pre laying) and 2750 (pre peak) kcal/kg. A completely randomized design was used with four lysine levels assessed in four replicates. The lysine levels did not influence weight gain, feed intake, protein and energy intake, age at first egg laying, egg production, egg weight, feed conversion indexes, egg mass, nitrogen balance or crude fat. There was positive linear increase on lysine intake according to the dietary levels of digestible lysine. Lysine levels do not influence the performance or the nutrients balance, and 0.6% of lysine per kilogram of feed is recommended.

show abstract

Curvas de crescimento e de deposição dos componentes corporais em aves de postura de diferentes linhagens

Cited by 37 publications

References 11 publications

Energy requirement for maintenance and gain for two genotypes of quails housed in different breeding rearing systems

Energy requirement for maintenance and gain for two genotypes of quails housed in different breeding rearing systems

Comparison of the Quality Adjusting of Nonlinear Models for Organs, Carcass and Body Components in Meat-Type (Coturnix Coturnix Coturnix) and Laying-Type (Coturnix Coturnix Japonica) Quail

Níveis de lisina digestível para poedeiras Lohmann LSL na fase de 16 a 25 semanas de idade

Contact Info

Product

Resources

About