Critical points on egg production: causes, importance and incidence of eggshell breakage and defects

Abstract

The occurrence of broken eggs directly depends on the quality of the shell. It is important to consider that the problem of broken eggs is not due to a single factor but a combination of factors. Shell defects, irregularities in shell shape, texture and surface are commonly observed during a regular egg laying cycle and the causes are varied. The incidence of downgraded eggs still represents an important source of economic loss for the egg industry due to products damage and need for further processing. It is possible to obtain significant reduction in the number of eggs lost due to the inferior quality of the shell attempting to an adequate nutrition, disease control, good management practices, and use of genetic lines with higher quality eggshell traits.Index terms: Defective shell, egg industry, eggshell quality, laying hens, shell integrity. RESUMOA ocorrência de ovos quebrados depende diretamente da qualidade da casca. É importante considerar que o problema de ovos quebrados não se deve a um único fator, mas sim a uma combinação de fatores. Defeitos de casca, irregularidades no formato da casca, textura e superfície são comumente observados durante um ciclo regular de postura e as causas são várias. A incidência de ovos descartados ainda representa uma importante fonte de prejuízo econômica à indústria, em razão da perda desses ovos e necessidade de processamento adicional. É possível obter significativa redução no número de ovos perdidos, pela qualidade inferior da casca ,focando-se em uma nutrição adequada, no controle de doenças do plantel, em boas práticas de produção e no uso de linhagens de aves que produzam ovos com melhor qualidade de casca.Termos para indexação: Defeitos de casca, cadeia de ovos comerciais, qualidade da casca, poedeiras comerciais, integridade da casca.

Efficacy of three sealing methods on hatchability of microcracked eggs from broiler breeder hens

“…Cracked eggs is one of the most important problems decreasing the economic efficiency of producers (Mazzuco and Bertechini, 2014). Kingori (2012) reviewed that more than 5% of eggs are not available for consumers, and 0.5-6% have eggshell damage.…”

Effect of Eggshell Osteopontin Protein on Skeletal Embryonic Development and Hatching Traits of Developed Chicken Strains

“…Also, Mazzuco and Bertechini (2014) mentioned that OPN had a major role in mineralization and Ca metabolism of chicken eggshell. Moreover, Pines (2007) mentioned that OPN concentration is believed to play an important role in the process of bone mineralization by its ability to bind calcium, its localization to electron-dense regions of mineralization and the regulation of its gene expression by calcitrophic hormones such as parathyroid hormone.…”

Histostructural indicators of the oviduct of geese in the productive period of the first cycle of egg-laying

“…Якість шкаралупи залежить від багатьох чинників. Доведено (McFerran, 1991;Arias, Fernandez, 2001;Solomon, 2002;Mazzuco, Bertechini, 2014), що екологічне навантаження на організм птиці внаслідок дії екотоксикантів, мікотоксинів, інфекційних агентів може спричиняти порушення цілісності структур слизової оболонки яйцепроводу, що призводить до дефектів формування яєць. Так, Solomon (2002) повідомляє, що за дії на репродуктивні органи птиці чинників інфекційної та неінфекційної природи, навіть після регенерації пошкоджених ділянок епітелію яйцепроводу, якість шкаралупи повністю не відновлювалась.…”