Eggshell spotting/Mottling: what is it and why does it occur?

摘要

In spite of all of the basic research that has been conducted in the area of mineral metabolism and eggshell formation, problems which are associated with the eggshell still exist. Even the slightest structural flaw has the potential to compromise theprimary biological function of the eggshell, which is to provide a chamber for embryonic development. The eggshell must be structurally sound enough to provide physical protection to the developing embryo throughout incubation while at the same time allow for adequate movement of respiratory gasses and water vapor. Since the developed chick has to emerge from within the egg, the eggshell must also be able to be penetrated during the hatching process.