Rapid Growth Phase of Ovum in the Guinea Fowl.

概要

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The length of rapid growth phase of ovum in the guinea fowl was estimated by the number of colored rings of the yolk of eggs obtained after daily feeding with Sudan Red 7 B and Sudan Black B alternatively at a definite time of each day. The length of the rapid growth phase ranged from 7 to 11 days. It was 8-10 days in one third of the birds, and in about two third of which it was 9 days. The diameter of the yolk of boiled eggs was about 3 cm, and a little smaller in the yolk showing 7 or 8 rings than in that showing 9 or 10 rings. The daily increment of yolk mass, calculated on the basis of radius of the colored ring, was greater in the yolk showing a lesser number of rings. It increased from day to day, but showed a plateau during the last 3 days in the yolk of 8 or 9 rings, or during the last 4 days in the yolk of 10 or 11 rings.
日本家禽学会の論文