Original Research

Yolk sac utilization in ostrich (Struthio camelus) chicks : research communication

E.Z. Mushi, M.G. Binta, R.G. Chabo
Onderstepoort Journal of Veterinary Research | Vol 71, No 3 | a267 | DOI: https://doi.org/10.4102/ojvr.v71i3.267 | © 2004 E.Z. Mushi, M.G. Binta, R.G. Chabo | This work is licensed under CC Attribution 4.0
Submitted: 08 November 2004 | Published: 08 November 2004

About the author(s)

E.Z. Mushi,
M.G. Binta,
R.G. Chabo,

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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.


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