Hatching success of ostrich eggs in relation to setting, turning and angle of rotation
- 1 March 2000
- journal article
- research article
- Published by Taylor & Francis Ltd in British Poultry Science
- Vol. 41 (1), 46-52
- https://doi.org/10.1080/00071660086394
Abstract
1. Three trials were designed to study the effects of axis of setting, turning frequency and axis and angle of rotation on the hatching success of ostrich eggs. The joint effects of axis of setting and angle of rotation were investigated in a fourth trial. 2. The hatchability of fertile ostrich eggs artificially incubated in electronic incubators (turned through 60° hourly) was improved substantially in eggs set in horizontal positions for 2 or 3 weeks and vertically for the rest of he time. 3. The hatchability of fertile eggs set in the horizontal position without any turning was very low (27%). It was improved to approximately 60% by manual turning through 180° around the short axis and through 60° around the long axis at 08.00 and 16.00 h. A further improvement to approximately 80% was obtained in eggs automatically turned through 60° around the long axis in the incubator. Additional turning through 180° around the short axis twice daily at 08.00 and 16.00 h resulted in no further improvement. 4. The hatchability of fertile eggs set vertically in electronic incubators and rotated hourly through angles ranging from 60° to 90° around the short axis increased linearly over the range studied. The response amounted to 1.83% for an increase of 1° (R 2= 0.96). 5. The detrimental effect of rotation through the smaller angle of 60° around the short axis could be compensated for by setting ostrich eggs in the horizontal position for 2 weeks before putting them in the vertical position.Keywords
This publication has 17 references indexed in Scilit:
- The performance of farmed ostrich hens in eastern AustraliaPreventive Veterinary Medicine, 1996
- Production, fertility and hatchability of ostrich (Struthio camelus) eggs on a farm in the United KingdomAnimal Science, 1996
- Mortality in near‐term ostrich embryos during artificial incubationBritish Poultry Science, 1996
- Factors affecting hatchability during commercial incubation of Ostrich (Struthio camelus)eggsBritish Poultry Science, 1995
- Observations on the commercial production of ostrich (Struthio camelus) in the United Kingdom: incubationVeterinary Record, 1993
- Reasons for the dichotomy in egg turning in birds and reptilesPublished by Cambridge University Press (CUP) ,1991
- Importance of sub‐embryonic fluid and albumen in the embryo's response to turning of the egg during incubationBritish Poultry Science, 1989
- Failure to turn eggs during incubation: Development of the area vasculosa and embryonic growthJournal of Morphology, 1989
- SOME PHYSICAL REQUIREMENTS FOR OSTRICH EGG INCUBATIONOstrich, 1985
- SOME OBSERVATIONS AND EXPERIMENTS ON THE NATURAL AND ARTIFICIAL INCUBATION OF THE EGG OF THE COMMON FOWLThe Biological Bulletin, 1907