INTERNAL AND EXTERNAL QUALITY OF COMMERCIAL LAYING HENS EGGS WITH NORMAL AND VITREOUS EGGSHELL

Authors

  • Daniela Reis Vilela Universidade Federal de Uberlândia
  • Leticia Souza Silva Carvalho Universidade Federal de Uberlândia
  • Naiara Simarro Fagundes Universidade Federal de Uberlândia
  • Evandro de Abreu Fernandes Universidade Federal de Uberlândia Prof. Dr. do Programa de Pós Graduação em Ciências Veterinárias UFU- MG

DOI:

https://doi.org/10.1590/cab17421535

Keywords:

Poultry Science

Abstract

The objective of this study was to evaluate the internal and external quality of eggs classified as eggs with normal eggshell and eggs with vitreous eggshell, produced by hens at three different ages. Forty-five eggs of each eggshell type, normal and vitreous, were sampled at the ages of 30, 50, and 70 weeks. The weight of the egg, in both types of eggshell, increased with the advancing age of the hen. Higher concentration of calcium was found in eggs with normal eggshells comparing to eggs with vitreous eggshells. The eggshell type did not affect phosphorus percentage. The mineral deposition of the eggshell was constant. The skin thickness increased irrespective of the shell along the reproductive life of the chicken and decreased when the bird became older. The percentage of albumen increased, while the percentage of albumen protein and pH decreased throughout the ages. Percentage of egg yolk, humidity, and pH decreased with increase of age of the laying hen, whereas crude protein and lipid increased. Eggs with vitreous eggshell showed eggshell with lower quality compared to those with normal eggshell, without, however, compromising the internal quality of albumen and yolk.

Keywords: egg quality; eggshell types; physical analysis.

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Published

2016-10-28

How to Cite

VILELA, D. R.; CARVALHO, L. S. S.; FAGUNDES, N. S.; FERNANDES, E. de A. INTERNAL AND EXTERNAL QUALITY OF COMMERCIAL LAYING HENS EGGS WITH NORMAL AND VITREOUS EGGSHELL. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 17, n. 4, p. 509–518, 2016. DOI: 10.1590/cab17421535. Disponível em: https://revistas.ufg.br/vet/article/view/21535. Acesso em: 8 jul. 2024.

Issue

Vol. 17 No. 4 (2016)

Section

Animal Production

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