Composition of Eggs by Commercial Size Categories: Effects of Genetic Group, Age, and Diet

Akbar, Mubarak; Gavora, J. S.; Friars, G. W.; Gowe, R. S.

doi:10.3382/ps.0620925

Cited by 50 publications

(23 citation statements)

References 11 publications

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“…The influence of age on the composition of the egg is already reported by numerous studies (Marion et al, 1964;Akbar et al, 1983;Fletcher et al, 1983;Nys, 1986;Rossi and Pompei, 1995;Hartmann et al, 2000;Dolgokorova, 2006).…”

Section: Carcass Characteristics and Meat Qualitymentioning

confidence: 58%

Egg and meat production performances of two varieties of the local Ardennaise poultry breed: silver black and golden black

Moula

Michaux

Philippe

et al. 2013

Anim. Genet. Resour.

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SummaryThe Ardennaise breed is emblematic of the Belgian poultry diversity. We compared two varieties of the breed, the golden black and the silver black. The comparison encompassed: (i) the morphology of adult birds, (ii) the growth, carcass characteristics and meat quality of broilers 22 weeks old, (iii) the laying rate during 52 weeks and the egg quality. Significant differences were observed in the size of mature males and females: body weight, diameter and length of the tarsus, size of the comb and wattles. The two varieties did not differ concerning the carcass and meat quality traits. The golden black has a higher laying rate and a higher yolk / albumen ratio, but lays lighter eggs. It could be interesting to complete this study by molecular markers analysis to evaluate the degree of genetic diversity between the two varieties.Keywords: Ardennaise breed, poultry diversity, morphology, breeding, broiler and laying performances Résumé La poule Ardennaise est une race emblématique de la biodiversité avicole belge. Cette étude est consacrée à la comparaison de deux variétés de la race Ardennaise (Noire dorée et Noire Argentée). La comparaison est réalisée par le biais de trois études: (1) caractérisation morpho-biométrique des deux variétés; (2) caractérisation de la croissance et de la qualité de la carcasse et de la viande; (3) suivi du taux de ponte pendant 52 semaines et étude de la qualité des oeufs à 30, 45, 60 et 75 semaines d'âge. Des différences significatives ont été enregistrées entre les deux variétés au niveau des poids corporels, du grand diamètre du tarse, de la longueur du tarse et de la taille de la crête. La variété de la poule Ardennaise n'influence significativement aucun des caractères quantitatif et qualitatif de production de viande (rendement, poids après abattage, pH, couleur de la viande). Cependant, elle influence significativement le poids de l'oeuf entier, le poids du blanc, le pourcentage du blanc, le pourcentage du jaune, le rapport jaune/blanc et le pH du blanc ( p < 0.05). Il serait intéressant de compléter cette étude par une analyse moléculaire permettant de préciser le degré de similitude génétique entre les deux variétés et éventuellement avec les autres variétés de la race.Mots-clés: race Ardennaise, diversité aviaire, morphologie, sélection, poulet de chair et performances de ponte Resumen La raza Ardenesa es una raza emblemática dentro de la diversidad avícola belga. Se han comparado dos variedades de la raza, la negra dorada y la negra plateada. La comparación comprendió (i) la morfología de aves adultas, (ii) el crecimiento, características de la canal y calidad de la carne de pollos broiler de 22 semanas de edad, (iii) la tasa de puesta durante 52 semanas y la calidad del huevo. Se observaron diferencias significativas en el tamaño de machos y hembras maduros: peso corporal, diámetro y longitud de los tarsos, tamaño de la cresta y de las barbillas. Las dos variedades no difirieron en lo que respecta a parámetros de la canal o de calidad de carne. La variedad negra do...

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Section: Carcass Characteristics and Meat Qualitymentioning

confidence: 58%

Egg and meat production performances of two varieties of the local Ardennaise poultry breed: silver black and golden black

Moula

Michaux

Philippe

et al. 2013

Anim. Genet. Resour.

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“…Akbar et al (1983) also observed that higher dietary CP levels increased yolk percentage in laying hens. Previous studies showed that increasing dietary CP from 16 to 20% did not affect albumen, yolk, or eggshell weight (Garcia et al, 2005;Abdel-Azeem, 2011), neither eggshell thickness in quails (Abdel-Azeem, 2011).…”

Section: Egg Qualitymentioning

confidence: 69%

Effects of Dietary Protein Level and Betaine Supplementation on Nutrient Digestibility and Performance of Japanese Quails

Ratriyanto

Indreswari

Nuhriawangsa

2017

Rev. Bras. Cienc. Avic.

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This study investigated the effects of dietary protein levels and betaine supplementation on nutrient digestibility and performance of Japanese quails. In total, 765 Japanese quails were randomly assigned to a 3×3 factorial arrangement, with five replicates of 17 quails each. Three basal diets were formulated to contain three crude protein levels (16.5, 18.0, and 19.5%). Each protein level was supplemented with 0, 0.06, and 0.12% betaine. The diet with 16.5% dietary crude protein with no betaine supplementation resulted in the lowest crude fiber digestibility, while the 18.0% CP diet supplemented with 0.12% betaine generated the highest crude fiber digestibility (p<0.05). The diets with 18.0 and 19.5% crude protein increased crude fiber digestibility, but reduced ether extract digestibility (p<0.01). Moreover, betaine supplementation increased dry matter, crude protein, crude fiber, and crude ash (p<0.01) digestibility and tended to increase ether extract digestibility (p=0.09). The increase in egg weight for the 18.0 and 19.5% protein diets was correlated with a decrease in feed conversion ratio (p<0.05). However, feed intake and egg production were not affected by protein levels. Betaine supplementation enhanced all performance variables (p<0.01). The diets with 18.0 and 19.5% crude protein resulted in heavier yolks and eggshells than the 16.5% crude protein diet (p<0.05), whereas betaine supplementation increased yolk, albumen, and eggshell weight (p<0.01). The 18.0 and 19.5% protein diets produced similar responses in most evaluated parameters. Laying Japanese quails can be fed diets with 18.0% crude protein. Moreover, betaine supplementation provided several benefits, and particularly improved nutrient digestibility, performance, and egg quality.

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“…It is well known that egg weight increases with hen age, reaching a plateau by the end of the laying cycle (Weatherup & Foster, 1980). Hen age also affects the proportion of yolk, albumen and eggshell (Fletcher et al, 1981;Akbar et al, 1983;Danilov, 2000). The egg specific gravity and eggshell thickness decrease with advancing breeder age.…”

Section: Introductionmentioning

confidence: 99%

Egg traits and physiological neonatal chick parameters from broiler breeder at different ages

Luquetti

Gonzáles

Bruno

et al. 2004

Rev. Bras. Cienc. Avic.

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This investigation was carried out to study egg traits (weight, specific gravity and eggshell thickness), and neonatal chick parameters (weight, blood, cardiac and lung parameters) from breeder at different ages. After hatching, neonatal chicks, male and female, from broiler breeder at three different ages (30, 45 and 60 weeks) were sacrificed and blood (red blood cell number, hematocrit, mean cell volume, blood viscosity, and haemoglobin), cardiac (right ventricle and total ventricle weights, cardiac index) and lung (mean pulmonary pressure, fresh relative lung weight) parameters were measured. No significant differences in eggshell thickness or specific gravity were observed in eggs from the three different breeder age. The incubated eggs and neonatal chicks showed heavier absolute weights with increasing breeder age. Broiler breeder age did not affect blood parameters or cardiac index, but affected right ventricle and total ventricle absolute weights. Red blood cell number and hematocrit were higher and lung weight and lung weight:chick weight index were lower for female neonatal chicks. The findings of this study revealed that breeder age affects neonatal chick parameters such as body weight, heart and lung absolute weights, but not blood parameters.

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Composition of Eggs by Commercial Size Categories: Effects of Genetic Group, Age, and Diet

Cited by 50 publications

References 11 publications

Egg and meat production performances of two varieties of the local Ardennaise poultry breed: silver black and golden black

Egg and meat production performances of two varieties of the local Ardennaise poultry breed: silver black and golden black

Effects of Dietary Protein Level and Betaine Supplementation on Nutrient Digestibility and Performance of Japanese Quails

Egg traits and physiological neonatal chick parameters from broiler breeder at different ages

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