The lower boundary of the thermoneutral zone; when ambient temperature falls below this limit, heat production in the organism increases.
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...
Ability of female birds to lay eggs.
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...