ostrich (Struthio camelus) blastoderm and embryo development following storage of eggs at various temperatures

1. The gross morphology of blastoderms in fresh unstored ostrich eggs and in eggs subjected to different regimen of storage and incubation was studied. Then the effects of storage duration of eggs (1, 2 and 3 weeks) and storage temperature (15, 20 and 25 degrees C) on blastoderm and embryo developme...

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Bibliographic Details
Published in:British poultry science 2005-12, Vol.46 (6), p.652-660
Main Authors: Malecki, I.A, Horbanczuk, J.O, Reed, C.E, Martin, G.B
Format: Article
Language:English
Subjects:
alternative livestock
Animals
blastoderm
Blastoderm - cytology
Blastoderm - physiology
egg fertility
egg quality
Embryo, Nonmammalian - cytology
Embryo, Nonmammalian - embryology
embryogenesis
incubation
ostrich eggs
ostriches
ova
Ovum - physiology
storage quality
storage temperature
storage time
Struthioniformes - embryology
Temperature
Time Factors
viability
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Summary:1. The gross morphology of blastoderms in fresh unstored ostrich eggs and in eggs subjected to different regimen of storage and incubation was studied. Then the effects of storage duration of eggs (1, 2 and 3 weeks) and storage temperature (15, 20 and 25 degrees C) on blastoderm and embryo development were investigated. 2. Only incubation following overnight storage at 18 degrees C advanced blastoderm development (1.5-fold increase in diameter) to a stage comparable to hypoblast. 3. Storage of eggs at 15 or 20 degrees C did not affect blastoderm stage and size whereas, at 25 degrees C, the blastoderm doubled in size and appeared to have advanced to a primitive streak stage. Embryo development was reduced after 2 weeks of storage regardless of the storage temperature. 4. After oviposition and during pre-incubation storage the ostrich blastoderm develops progressively over time in a temperature-dependent manner towards the hypoblast stage and beyond but the viability of the blastoderm and embryo development is seriously compromised by 2 weeks of storage.
ISSN:0007-1668
1466-1799
DOI:10.1080/00071660500408682