Determining the Effects of Egg Shape Index on Egg Quality Traits in Cream-Colored Layer Hens
Öz
Objective: This study was conducted to determine the effect of egg shape index on the internal and external quality characteristics of eggs.
Materials and Methods: Eggs were divided into three groups according to their shape index values: < 74, < 74 - 76 >, and > 76. A total of 161 eggs were used to determine the internal and external quality characteristics of the eggs. In the study, the egg shape index significantly affected many parameters such as egg width, egg length, egg weight, shell weight, white length, white width, white height, yolk height, yolk diameter, white index, yolk index, shell surface area, Haugh unit, egg volume, egg circumference, pore count, and pore density.
Results: The eggshell surface area, egg weight, egg volume, egg circumference, pore count, and pore density were highest in the third group (shape index > 76). It was determined that as the shape index increased, the egg became rounder, and accordingly, the width and circumference of the egg increased, while the length of the egg decreased.
The highest albumen length was obtained in the first group. The highest values in terms of albumen width, albumen height, yolk height, yolk diameter, and albumen index were determined in the third group (shape index > 76). There was no significant difference between the egg shape index groups in terms of specific gravity, eggshell thickness, yolk weight, albumen weight, shell ratio, yolk/albumen ratio, albumen ratio, and yolk ratio.
Conclusion: It can be said that the egg shape index is an important parameter in terms of both morphology and egg quality, and therefore it is a critical indicator not only in the selection of table eggs but also in the selection of eggs to be used in breeding production.
Anahtar Kelimeler
Kaynakça
- Abanikannda, O.T.F., Olutogun, O., Leigh, A.O., & Ajayi, L.A. (2007). Statistical modeling of egg weight and egg dimensions in commercial layers. International Journal of Poultry Science, 6, 59-63.
- Aktan, (2004). Determining some exterior and interior quality traits of quail eggs and phenotypic correlations by digital image analysis. Hayvansal Üretim, 45(1), 7-13.
- Alkan, S., Karslı, T., Galiç, A., & Karabağ, K. (2013). Determination of phenotypic correlations between internal and external quality traits of Guinea fowl eggs. Kafkas Üniversitesi Veteriner Fakültesi Dergisi, 19(5), 861-867.
- Alkan, S., Karslı, T., Durmuş, İ., & Karabağ, K. (2016). Beç tavuklarında (Numida meleagris) yumurta şekil indeksinin yumurta kalitesine etkileri. Türk-Tarım Gıda ve Bilim Teknolojisi Dergisi, 4(9), 758-762.
- Alkan, S., & Derebaşı, S. (2018). Ordu ilinde yumurta tüketim bilincinin belirlenmesi. Akademik Ziraat Dergisi, 7(2), 237-244.
- Alkan, S. (2024). Prediction of internal quality characteristics by regression equations using external quality characteristics of egg in cream-coloured laying hens. Akademik Ziraat Dergisi, 13(2), 409-419.
- Alipanah, M., Deljo, J., Rokouie, M., & Mohammadnia, R. (2013). Heritabilities and genetic and phenotypic correlations of egg quality in Khazak layers. Trakia Journal of Sciences, 2, 175-180.
- Altan, (2015). Yumurta (Oluşumu, Kalitesi ve Biyoaktif Komponentleri). Ege Üniversitesi Basımevi, İzmir. Altuntaş, E., & Şekeroğlu, A. (2008). Effect of egg shape index on mechanical properties of chicken eggs. Journal of Food Engineering, 85(4), 606–612.
- Anderson, K. E., Tharrington, J. B., Curtis, P. A., & Jones, F. T. (2004). Shell characteristics of eggs from historic strains of single comb white leghorn chickens and relationship of egg shape to shell strength. International Journal of Poultry Science, 3(1), 17–19.
- Bayram, B., & Aksakal, V. (2008). Organik çiftlik hayvanları yetiştiriciliğinin esasları. Hasad Hayvancılık Dergisi, 24(279), 52-56.