The egg shape, as a description datum about adult bird is an important object for research work closely allied with the bird adaptation to brood under different environmental conditions. Besides, it is possible to use this approach as an additional research instrument for general bird evolution study, ecological proximity, taxonomy, etc. Moreover, at the same time egg shape profile is the mostly suitable characteristic for intravital study above-mentioned aspects. Keywords: Egg shape; photo-computing method; egg radius; curvature References: Anderson, M. (1978). Optimal egg shape in waders. Ornis Fennica, 55, 105-109. Âvila, D. D. (2014). Aplicaciôn de las funciones elipticas de Fourier para la description de la forma de los liuevos de las aves. Rev. Biol. Trop, 62(4), 1469-1480. Baker, D. E. (2002). A geometric method for determining shape of bird eggs. The Auk, 119, 1179-1186. https://doi.org/10.1642/0004-8038(2002)119(1179:AGMFDS)2.0.CO;2. Ban, M., Barta, Z., Munoz, A. 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Salinity and Egg Shape Variation: A Geometric Morphometric Analysis // Journal of Herpetology, 47(1), 15-23. Narushin, V. G. (2001). Shape geometry of the avian egg. J. Agric. Engin. Res, 79, 441-448. Nedomová, Š., & Buchar, J. (2014). Goose eggshell geometry. Res. Agr. Eng, 60, 100-106. Nishiyama, Y. (2010). The Mathematics of Egg Shape. Available from: http://www.osaka-ue.ac.jp/zemi/nishiyama/math2010/egg.pdf Accessed on 15.11.2018 Paganelli, C. V., Olszowka, A., & Ar, A. (1974). The avian egg: surface area, volume, and density. The Condor, 76, 319-325. Petrovi??, ??., & Obradovi??, ??. (2010). The complement of the hugelschaffer’s ?onstruction of the egg curve. Avalable from: https://www.researchgate.net/publication/273139632/ Accessed on 20.11.2018. Preston, F. W. (1953). The shapes of birds egg. The Auk, 70, 160-182. Preston, F. W. (1957a). Two New Devices for Measuring the Shapes of Birds' Eggs. The Auk, 74, 386-388. Preston, F. W. (1968). The shapes of birds eggs: mathematical aspects. The Auk, 85, 454-463. Reid, W. S., Buckley, D. J., Hunt, J. R., & Prices, K. (1974). A digital instrument for egg shape index measurement. Canadian Journal of Animal Science, 55, 87-92. Stoddard, M. C., Yong, E. H., Akkaynak, D., Sheard, C., Tobias, J. A., & Mahadevan, L. (2017). Avian egg shape: form, function, and evolution. Science, 356, 1249-1254. Todd, P. H., & Smart, I. H. M. (1984). The shape of birds’ eggs. J. Theor. Biol, 106, 239-243. Troscianko, J. (2014). A simple tool for calculating egg shape, volume and surface area from digital images. Ibis, 156(4), 874-878. Yamamoto, N. (2016). We Find an Equation of Egg Shaped Curve. Available from: http://www.geocities.jp/nyjp07/index_egg_E.html/ Accessed on 02.11.2018
Alan : Fen Bilimleri ve Matematik
Dergi Türü : Uluslararası
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