ATAK-S is a newly developed native hybrid layer. Although the laying performance of this hybrid has been studied and determined, the performance response of the hybrid to different environmental temperature conditions is not known. This study was therefore undertaken to determine the effect of cold and heat stress on egg quality traits. Hens were divided into three different groups; control (20°C), low (12°C) and high (32°C). A total of 360 hens, with 120 in each of the groups, were used in the study. Hens were held in three tier battery cages in an environmentally controlled poultry house. The study lasted for 3 weeks. No differences were found among different groups in terms of shape index, albumen height and Haugh unit of the egg quality traits. It was found that the differences among the heat groups in terms of egg shell breaking strength, egg weight, shell thickness and yolk colour were significant and the value of these traits decreased under the heat stress conditions, whereas they were not affected from the cold stress.
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Ahvar F, Petersen J, Horst P, Thein H. 1982. Changes in egg quality during the first laying period at high .ambient temperatures. Archiv für Geflugelkunde, 46: 1-8.
Czarick M, III Fairchild BD. 2008. Poultry housing for hot climates. Poultry production in hot climates, edited by NJ Daghir, 2nd ed.,ISBN-13:9781845932589, printed and bound in the UK by Cronwell Press,Trounbridge, Pp,160.
Dai NV, Bessei W, Nasir Z. 2009. The effect of sodium chloride supplementation in the drinking water on water and feed intake and egg quality of laying hens under cyclic heat stress. Archiv für Geflugelkunde, 74: 217-226.
Daniel M, Bolnave D. 1979. The response of laying hens to heat stress. Proceeding, Third Australian Poultry and Stock Feed Convention, Suffers International, 23 rd -28th September, 178- 183.
Deaton JW. 1983. Alleviation of heat stress for avian egg production. Worlds Poultry Science Journal, 39: 210-217. Durmus I, Sarica M, Aktan S, Yildiz T, Kahraman Z, Ertas S. 2009. Determination of production traits of newly developed local commercial layer hybrids. Poultry Research Journal, 8: 5-9.
Ehran MK, Bolukbasi SC. 2011. Effects of feeding diets supplemental with vitamin E and vitamin C on performance, egg quality and stereological and structural analysis of liver of laying hens exposed to heat stress. Italian Journal of Animal Science, 10: e58.
Feizi A, Shahazi M, Taifebagerlu J, Haghigat A. 2012. Effect of heat stress (HS) on production of Hy-Line layers. Research Journal of Biological Sciences, 7: 206-208.
Felver-Gant JN, Mack LA, Dennis RL, Eicher SD, Cheng HW. 2012. Genetic variation alter physiological responses following heat stress in 2 strain of laying hens. Poultry Science, 91: 1542-1551.
Gill SPS, Gangwar PC. 1984. Effect of heat stress on egg production and egg quality. Indian Journal of Animal Sciences, 54: 473-478.
Hui L, Feijiang T, Tao S, Xiaoting Z, Bin Z. 2010. Effects and mechanism of y-aminobutyric acid on laying performance and egg quality of laying hens under high temperature in summer. Chinese journal of Animal Nutrition, 22: 1745- 1751.
Moshaly MM, Handricks GL, Kalama MA, Gehad AE, Abbas AO, Peterson PH. 2004. Effect heat stress on production parameters and immune responses of commercial laying hens. Poultry Science, 83: 889-894
Rozenboim I, Gal-Garber O, Proudman JA, Uni Z. 2007. The effect of heat stress on ovarian function of laying hens. Poultry Science, 86: 1760-1765.
Ryu MS, Cho KH, Shin WJ, Ryu KS. 2002. Influence of dietary supplemental betaine on performance and egg quality of laying hens during the heat stress. Korean Journal of Poultry Science, 29: 117-123.
Yardibi H, Turkay G. 2008. The effects of vitamin E on the antioxidant system, egg production and egg quality in heat stressed laying hens. Turkish Journal of Veterinary & Animal Science, 32: 319-325.
ZiaoTing Z, YouMing W. 2002. Effect of aspirin on performance of laying hen and egg quality under heat stress. Journal of Zhejiang University, Agriculture and Life Science, 28: 298-302.