Body weight at point of lay and the ultra-structural properties of eggshells
Ultra-structural studies have demonstrated that the eggshell is comprised of morphological distinct calcified layers with the mammillary layer being the “foundation” of the eggshell.
Studies...
Neural regulation of broodiness in turkeys
Egg production in turkeys is regulated by photoperiod. Long days stimulate egg production, followed by broodiness and a photorefractory stage in which long days...
Egg cholesterol content is correlated with serum low density lipoprotein
Cholesterol content in egg yolk could influence embryo development. To screen proper index for cholesterol selection, at 42 wks of age, 331 female Wenchang...
The coalition for a sustainable egg supply
The CSES is a multi-stakeholder group led by McDonald’s, Cargill, Michigan State University, University of California-Davis, and the American Humane Association, with the American Veterinary Medical Association, the USDA Agricultural Research Service, and the Environmental Defense Fund serving as advisors.
The effect of hen age, storage period and temperature on egg quality in layer...
Extensive research has investigated the effects of production systems on egg quality; however, confounding problems exist with many of the experimental designs. Insufficient consideration...
What’s the best sample size for egg break-out?
Egg break-outs are often part of the routine of a hatchery. As the procedure for these is time consuming, the findings are usually based...
About the U.S. Egg Industry
United States table egg production totalled 7.55 billion during April 2017.1
Table egg flock size on May 1, 2017, was 313 million layers. Rate of...
Using egg breakouts to improve hatch and poult quality
Egg breakout or hatch residue analysis is one of the most powerful diagnostic tools in a hatchery. Breakouts can be used to aid troubleshooting,...
Embryonic restoration during prolonged storage
Focus on benefits of heat treatment to reduce embryonic mortality caused by prolonged storage in avian species. Current technology allows being more accurate and the process with consistent results irrespective of egg age, breed, size, egg weight or storage time of the loaded eggs.
The effect of nutrient profiles in egg yolk on embryonic survival ability in laying...
About 8% of chicken embryos die before hatching each year; the value is much higher in turkeys. Embryonic viability is influenced by a series...
Effects of different conditions of storage on egg components and blastodermal quality and high...
Egg quality is a general term that relates to various standards that are imposed on eggs. This quality usually embraces a range of quality...
Establishing true fertility in hatching eggs
If it comes to discussions on fertility two different definitions are practiced. A true fertile egg contains a well-developed germinal disc (blastoderm). This indicates...
Too many clears? Break-out analysis needed!
Gerd de Lange, Senior Poultry Specialist, Pas Reform AcademyA hatchery’s objective is to hatch a chick from every egg that is set. However, losses...
