The genetically determined capacity of a female bird to produce eggs, realised as the number laid over a defined period; distinct from laying intensity, which expresses how fully that capacity is achieved.
An elongated structure of pale yolk extending into the interior of the yolk.
A reduced metabolic activity of the embryo in the egg caused by cooling below 16...
A laying series (clutch) together with the subsequent pause.
The period during which a layer is producing eggs; duration depends mainly on sp...
The ability of a hen to maintain regular egg production throughout as long a lay...
A utility type characterized by a light body, high egg production, and high egg ...