Efeito da forma física da ração sobre a porosidade, espessura da casca, perda de água e eclodibilidade em ovos de perdiz (Rhynchotus rufescens)

Nakage, ES; Cardozo, JP; Pereira, GT; Queiroz, S. A.; Boleli, Isabel Cristina

doi:10.1590/s1516-635x2002000300007

Cited by 7 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They readily adapt to commercial feeds (Moro, 1996) and to routine techniques for sexing Tholon P, Queiroz SA Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity the chicks (Moro, 1991). Nakage et al (2002) determined that the optimal temperature for tinamous egg incubation is between 35.5ºC and 36.5ºC, and 60% relative humidity. Bruneli et al (2005), studying 248 eggs, reported that tinamous chicks weigh 37.81 g at hatching, varying between 27.44 and 53.84 g. Tholon et al (2003) reported a fast growth rate between 7 and 90 days of age, after which birds grow slower until slaughter age, which is around 160 days.…”

Section: Introductionmentioning

confidence: 99%

Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity

Tholon

Queiroz

2007

Rev. Bras. Cienc. Avic.

Self Cite

View full text Add to dashboard Cite

Growth curves models provide a visual assessment of growth as a function of time, and prediction body weight at a specific age. This study aimed at estimating tinamous growth curve using different models, and at verifying their goodness of fit. A total number 11,639 weight records from 411 birds, being 6,671 from females and 3,095 from males, was analyzed. The highest estimates of a parameter were obtained using Brody (BD), von Bertalanffy (VB), Gompertz (GP,) and Logistic function (LG). Adult females were 5.7% heavier than males. The highest estimates of b parameter were obtained in the LG, GP, BD, and VB models. The estimated k parameter values in decreasing order were obtained in LG, GP, VB, and BD models. The correlation between the parameters a and k showed heavier birds are less precocious than the lighter. The estimates of intercept, linear regression coefficient, quadratic regression coefficient, and differences between quadratic coefficient of functions and estimated ties of quadratic-quadratic-quadratic segmented polynomials (QQQSP) were: 31.1732±2.41339; 3.07898± 0.13287; 0.02689±0.00152; -0.05566±0.00193; 0.02349±0.00107, and 57 and 145 days, respectively. The estimated predicted mean error values (PME) of VB, GP, BD, LG, and QQQSP models were, respectively, 0.8353; 0.01715; -0.6939; -2.2453; and -0.7544%. The coefficient of determination (R²) and least square error values (MS) showed similar results. In conclusion, the VB and the QQQSP models adequately described tinamous growth. The best model to describe tinamous growth was the Gompertz model, because it presented the highest R² values, easiness of convergence, lower PME, and the easiness of parameter biological interpretation

show abstract

Section: Introductionmentioning

confidence: 99%

Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity

Tholon

Queiroz

2007

Rev. Bras. Cienc. Avic.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In relation to the eggshell, nutrition affects its weight, thickness (Nakage, Cardozo, Pereira, Queiroz, & Boleli, 2002), porousness and conductance (Ar, Paganelli, Reeves, Greene, & Rahn, 1974;Nakage et al, 2002). Considering that the eggshell supplies calcium for embryonic and fetal development (Grizzle, Iheanacho, Saxton, & Broaden, 1992), it is necessary that the standard thickness of a given species remains unchanged so as not to alter the availability of this mineral for in ovo development.…”

Section: Resultsmentioning

confidence: 99%

<b>Chemical characteristics and thickness of <i>Podocnemis expansa</i> post-hatching eggshells (Testudines, Podocnemididae)

Ferreira

Vieira

Valdes

et al. 2016

Acta Sci. Biol. Sci.

View full text Add to dashboard Cite

ABSTRACT. Knowledge on chemical components of the post-hatching eggshell of reptiles may provide indicators of the quality of the diet offered to females kept in captivity. Therefore, the objective of this study was to investigate the chemical characteristics of the calcareous layer, as well as the thickness of Podocnemis expansa post-hatching eggshells. Eggshell thickness was 183±1.405 μm. This value is similar to that of the eggs of other Testudines with flexible eggshells. As for the chemical composition, the following percentages were observed: nitrogen 7.983 ± 0.054; crude protein 49.91 ± 0.324; crude fat 0.068 ± 0.002; mineral matter 20.302 ± 0.807; calcium 13.374 ± 0.647; and phosphorus 0.176 ± 0.003. Knowledge on chemical composition of the eggshell may aid the nutrition of P. expansa raised in commercial facilities, once this species is an alternative and promising source of exotic meat. Aspectos químicos e espessura da casca de ovos de Podocnemis expansa pós-eclosão (Testudines, Podocnemididae) RESUMO. O conhecimento sobre os constituintes químicos da casca de ovos pós-eclosão de répteis pode ser um referencial de qualidade da dieta fornecida para as fêmeas que vivem em cativeiro. Assim, este trabalho visa investigar os aspectos químicos que compõem a camada calcária, bem como a espessura da casca do ovo de Podocnemis expansa no período pós-eclosão. A espessura média da casca dos ovos foi de 183 ± 1,405 μm. Esta espessura é condizente com ovos de outros Testudines com casca flexível. Para os constituintes químicos, foram encontrados os seguintes valores médios percentuais: nitrogênio 7,983 ± 0,054, proteína bruta 49,91 ± 0,324, gordura bruta 0,068 ± 0,002, matéria mineral 20,302 ± 0,807, cálcio 13,374 ± 0,647 e fósforo 0,176 ± 0,003. Este conhecimento sobre a composição química da casca poderá auxiliar na criação em escala comercial dessa espécie, uma vez que a P. expansa tem se apresentado como fonte alternativa e promissora de carne exótica.Palavras-chave: composição química, ovos, camada calcária, Tartaruga-da-Amazônia.

show abstract

“…Without an exhaust fan, a still air incubator cannot circulate the air. An exhaust fan is essential to maintain the incubator's heat, moisture level, and oxygen content (Nakage et al 2003). Researchers have been working on developing incubators for different types of eggs, including chicken (Schmitt 2015), quail (Deka et al 2016), partridge (Nakage et al 2003), and others.…”

Section: Introductionmentioning

confidence: 99%

“…An exhaust fan is essential to maintain the incubator's heat, moisture level, and oxygen content (Nakage et al 2003). Researchers have been working on developing incubators for different types of eggs, including chicken (Schmitt 2015), quail (Deka et al 2016), partridge (Nakage et al 2003), and others. These researchers have developed incubators with automated control systems, including temperature (Ohpagu and Nwosu 2016), humidity (Schmitt 2015), egg rotation (Ramli et al 2015), and others, based on microcontroller technology (Ali and Amran 2016;Abdul-Rahaim et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Manufacture and evaluation of a semi-automatic incubator for hatching quail eggs

Ghareeb¹,

Al-Rajhi²

2023

Mediterranean Agricultural Sciences

View full text Add to dashboard Cite

This research evaluates a semi-automatic incubator designed for hatching quail eggs using locally available materials, with the aim of increasing the quail population, since quails do not naturally incubate their eggs. The objective is to produce meat that competes with broilers as a rich source of protein. The study includes three experimental variables: three incubation temperatures (37, 37.5, and 37.7°C), three turning times (2, 6, and 12 times per day), and three post-hatching periods for chicks to remain in the incubator (2, 6, and 12 hours). The measurements include the percentage of total hatchability within the first 3 hours, as well as rates of deformation and mortality. The results of this research indicated that the manufactured semi-automatic incubator was able to maintain a high hatching percentage, low deformation percentage, and a low mortality percentage when using an incubation temperature of 37.5°C, turning the eggs 12 times per day, and allowing the chicks to stay in the incubator for 12 hours after hatching. Therefore, it is recommended to utilize the manufactured semi-automatic incubator for hatching quail eggs under the above-mentioned parameters.

show abstract

Efeito da forma física da ração sobre a porosidade, espessura da casca, perda de água e eclodibilidade em ovos de perdiz (Rhynchotus rufescens)

Cited by 7 publications

References 18 publications

Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity

Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity

<b>Chemical characteristics and thickness of <i>Podocnemis expansa</i> post-hatching eggshells (Testudines, Podocnemididae)

Manufacture and evaluation of a semi-automatic incubator for hatching quail eggs

Contact Info

Product

Resources

About