Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(3), 735-742 | DOI: 10.11118/actaun201361030735

Ostrich eggs geometry

©árka Nedomová1, Jaroslav Buchar2
1 Department of Food Technology, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic
2 Department of Technology and Automobile Transport, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

Precise quantification of the profile of egg can provide a powerful tool for the analysis of egg shape for various biological problems. A new approach to the geometry of a Ostrich's egg profile is presented here using an analysing the egg's digital photo by edge detection techniques. The obtained points on the eggshell counter are fitted by the Fourier series. The obtained equations describing an egg profile have been used to calculate radii of curvature. The radii of the curvature at the important point of the egg profile (sharp end, blunt end and maximum thickness) are independent on the egg shape index. The exact values of the egg surface and the egg volume have been obtained. These quantities are also independent on the egg shape index. These quantities can be successively estimated on the basis of simplified equations which are expressed in terms of the egg length, L, and its width, B. The surface area of the eggshells also exhibits good correlation with the egg long circumference length. Some limitations of the most used procedures have been also shown.

Keywords: Ostrich's egg, eggshell profile, radii of the curvature, egg volume, egg surface
Grants and funding:

The research has been supported by IP 2/2013 IGA MENDELU.

Received: February 3, 2013; Published: May 23, 2013  Show citation

ACS AIP APA ASA Harvard Chicago IEEE ISO690 MLA NLM Turabian Vancouver
Nedomová, ©., & Buchar, J. (2013). Ostrich eggs geometry. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 61(3), 735-742. doi: 10.11118/actaun201361030735
Share...
Download citation
  • BibTeX (.bib)
  • Bookends (.ris)
  • EasyBib (.ris)
  • EndNote (.enw)
  • EndNote 8 (.xml)
  • ISI WoS (.isi)
  • Medlars (.medlars)
  • Mendeley (.ris)
  • MODS (.xml)
  • Papers (.ris)
  • RefWorks (.txt)
  • RefManager (.ris)
  • RIS (.ris)
  • MS Word (.xml)
  • Zotero (.ris)
    • Open full article

    References

    1. ASAE, 2001: Compression Test of Food Materials of Convex Shape. ASAE S368.4, American Society of Agricultural Engineers, St. Joseph: The American Society of Agricultural Engineers.
    2. BARYEH, E. A., MANGOPE, B. K., 2003: Some physical properties of QP-38 variety pigeon pea. J Food Eng, 56, 1: 59-65. ISSN 0260-8774. DOI: 10.1016/S0260-8774(02)00148-6 Go to original source...
    3. DENYS, S., PIETERS, J. G., DEWETTINCK, K., 2003: Combined CFD and experimental approach for determination of the surface heat transfer coefficient during thermal processing of eggs. J Food Sci, 68, 3: 943-951. ISSN 1750-3841. DOI: 10.1111/j.1365-2621.2003.tb08269.x Go to original source...
    4. HAMILTON, R. M. G., 1982: Methods and factors that affect the measurement of eggshell quality. Poultry Sci, 61, 10: 2022-2039. ISSN 1537-0437. DOI: 10.3382/ps.0612022 Go to original source...
    5. HOYT, D. F., 1979: Practical methods of estimating volume and fresh weight of bird eggs. AUK, 96, 1: 73-77. ISSN 0004-8038.
    6. MOHSENIN, N. N., 1970: Physical properties of plant and animal material: structure, physical characteristics, and mechanical properties. New York: Gordon and Breach, 891 p. ISBN 0677213700.
    7. NARUSHIN, V. G., 1997: The avian egg: Geometrical description and calculation of parameters. J Agr Eng Res, 68, 3: 201-205. ISSN 1095-9246. DOI: 10.1006/jaer.1997.0188 Go to original source...
    8. NARUSHIN, V. G., 2001a: Shape geometry of the avian egg. J Agr Eng Res, 79, 4: 441-448. ISSN 1095-9246. DOI: 10.1006/jaer.2001.0721 Go to original source...
    9. NARUSHIN, V. G., 2001b: What egg parameters predict best its shell strength? In: IX European Symposium on the Quality of Eggs and Egg Products. Kusadasi (Turkey): WPSA, 349-355.
    10. NARUSHIN, V. G., 2005: Production, modelling and education egg geometry calculation using the measurements of length and breadth. Poultry Sci, 84, 482-484. ISSN 1537-0437. DOI: 10.1093/ps/84.3.482 Go to original source...
    11. NARUSHIN, V. G. and ROMANOV, M. N., 2002a: Egg physical characteristics and hatchability. World Poultry Sci J, 58, 297-303. ISSN 0043-9339. DOI: 10.1079/WPS20020023 Go to original source...
    12. NARUSHIN, V. G., and M. N. ROMANOV, 2002a: Physical characteristics of chicken eggs in relation to their hatchability and chick weight. In: Proceedings of ASAE Annual International Meeting/CIGR World Congress, Chicago: ASE, IL, paper 026066.
    13. NARUSHIN, V. G., ROMANOV, M. N., BOGATYR, V. P., 2002: Relationship between preincubation egg parameters and chick weight after hatching in layer breeds. Biosyst Eng, 83, 373-381. ISSN 1537-5110. DOI: 10.1006/bioe.2002.0122 Go to original source...
    14. NEDOMOVÁ, ©., SEVERA, L., BUCHAR, J., 2009: Influence of hen egg shape on eggshell compressive strength. Int Agrophys, 23, 3: 249-256. ISSN 0236-8722.
    15. PERIANU, C., DE KETELAERE, B., PLUYMERS, B., DESMET, W., DE BAERDEMAEKER, J., DECUYPERE, E., 2010: Finite element approach for simulating the dynamic mechanical behaviour of a chicken egg. Biosyst Eng, 106, 79-85. ISSN 1537-5110. DOI: 10.1016/j.biosystemseng.2010.03.001 Go to original source...
    16. ROMANOFF, A. L. and ROMANOFF, A. J., 1949: The avian Egg. New York: John Willey&Sons, 317 p.
    17. SABLIOV, C. M., FARKAS, B. E., KEENER, K. M., CURTIS, P. A., 2002: Cooling of shell eggs with cryogenic carbon dioxide: a finite element analysis of heat transfer. Lebensm-Wiss Technol, 35, 7: 568-574. ISSN 0023-6438. DOI: 10.1016/S0023-6438(02)90915-1 Go to original source...
    18. ZHOU, P., ZHENG, W., ZHAO, C., SHEN, C., SUN, G., 2009: Egg volume and surface area calculations based on machine vision. In: IFIP International Federation for Information Processing, Computer and Computing Technologies in Agriculture II, eds. D. Li, Z. Chunjiang. Boston: Springer, 295, 1647-1653. ISBN 1441902082. Go to original source...

    This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY NC ND 4.0), which permits non-comercial use, distribution, and reproduction in any medium, provided the original publication is properly cited. No use, distribution or reproduction is permitted which does not comply with these terms.


    Return to the content