Mushi E Z, Binta M G, Chabo R G
Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana.
Onderstepoort J Vet Res. 2004 Sep;71(3):247-9.
The mass of residual yolk sac expressed as a percentage of initial mass of the egg from which the chick hatched decreased sharply in the first 2 days post-hatching. A gradual reduction occurred between 3 and 10 days after which a sharp decline was noted between 11 and 13 days post-hatching. The highest number of chicks with unabsorbed yolk sac was noted on day 5 post-hatching followed by days 6 and 7. Chick mortality followed the same pattern. The dynamics, causes and clinical consequences of yolk sac utilization are discussed.
孵化出雏鸡的蛋中残留卵黄囊的质量占初始蛋质量的百分比在孵化后的头2天急剧下降。在孵化后3至10天逐渐减少，之后在孵化后11至13天出现急剧下降。孵化后第5天未吸收卵黄囊的雏鸡数量最多，其次是第6天和第7天。雏鸡死亡率遵循相同模式。本文讨论了卵黄囊利用的动态、原因及临床后果。
