Etlik piliçlerde embriyonun erken ve geç gelişim dönemlerinde yapılan yüksek ısıl uygulamaların yem tüketimine ve karkas özelliklerine etkileri*

Bu çalışmada etlik piliç ebeveyn yumurtasında; kuluçka gelişiminin erken ve geç embriyonik dönemlerinde yapılan yüksek ısıl uygulamanın, etlik piliç canlı ağırlığı ve yem tüketimine olan etkilerin belirlenmesi amaçlanmıştır. Bu amaçla kontrol grubu yumurtalarına optimum kuluçka koşulları (37.5 oC sıcaklık ve % 55 nem) 19. güne kadar olan gelişim dönemi boyunca uygulanmıştır. Kuluçkanın erken (8-10. günler) ve geç embriyonik (16-18. günler) dönemlerinde ise yumurtalara günlük 3 saat süreyle (12.00- 15.00), 41 oC sıcaklık ve % 65 nem uygulanmıştır. Her grupta 200 adet yumurta ve 120 adet etlik civciv kullanılmıştır. Etlik piliçlerin toplam yem tüketimleri kontrol, erken ve geç embriyonik dönem grupları için sırasıyla 2765.29 g, 2859.38 g ve 2901.45 g olarak hesaplanmış olup aralarındaki farklılık önemli bulunmamıştır. Toplam yemden yararlanma oranı bakımından ikinci ve üçüncü haftalarda gruplar arasında önemli bir farklılıklar saptanmıştır. Kesim ağırlığı, karkas ağırlığı, karkas randımanı ve kanat oranı bakımından gruplar arasında önemli farklılık bulunmuştur.

Effect of high thermal manipulations during early and late embryogenesis on feed consumption, feed efficiency rate and carcass characteristics of broilers

The aim of this study was to determine the effect of thermal manipulations during early and late embryogenesis on various performance and feed consumption in broiler chickens. Incubation conditions were 37.5 oC and 55 % relative humidity for control group throughout the incubation period until the 19th days. In the thermally treated eggs during early embryogenesis, incubation temperature was increased to 41 oC and relative humidity to 65 % for 3 hours (12.00-15.00) on the 8th-10th days of incubation. Also, in the late embryogenesis stage incubation temperature was increased to 41 oC and relative humidity to 65 % for 3 hours (12.00-15.00) on the 16th-18th days of incubation. Total 200 eggs and 120 broiler chicks were used in each group. In point of total feed consumption, there was found significant difference among the groups, and feed consumption values were determined as 2765.29 g, 2859.38 g ve 2901.45 g for the control, early embryonic and late embryonic groups, respectively. In the same time, the differences among the groups were found significant in terms of feed efficiency values for second and third weeks. There were found significant differences among the groups in point of slaughter weight, carcass rate and wing rate.

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Alkan, S. ve Mutaf, S., 2008. Farklı sıcaklık ve nem koşullarının farklı genotiplerdeki etlik piliçlerin vücut sıcaklıklarına ve canlı ağırlıklarına etkileri. Akdeniz Üniversitesi Ziraat Fakültesi Dergisi, 21: 45-54.
Collin, A., Berri, C., Tesseraud, S., Rodon, F.E., Skiba-Cassy, S., Crochet, S., Duclos, M.J., Rideau, N., Tona, K., Buyse, J., Bruggeman, V., Decuypere, E., Picard, M. and YAHAV, S., 2007. Effects of thermal manipulation during early and late embryogenesis on thermotolerance and breast muscle characteristics in broiler chickens. Poultry Science, 86: 795-800.
Decuypere, E., and Bruggeman, V., 2007. The endocrine interface of environmental and egg factors affecting chick quality. Poultry Science. 86: 1037-1042.
De Oliveira, J.E., Uni, Z. and Ferket, P.R., 2008. Important metabolic pathways in poultry embryos prior to hatch. Worlds Poultry Science Journal, 64: 488- 499.
El-Moniary, M.M.A., Hemid, A.A., El-Wardany, I., Gehad, A.E. and Gouda, A., 2010. The effect of early age heat conditioning and some feeding programs for heatstressed broiler chicks on: 1- productive performance. World Journal of Agricultural Sciences, 6 (6): 689-695.
Freeman, B.M. 1987. The stress syndrome. Worlds Poultry Science Journal, 43: 15-19.
Günal, M., 2012. The effects of early-age thermal manipulation and daily short-term fasting on performance and body temperatures in broiler exposed to heat stress. Journal of Animal Physiology and Animal Nutrition. 97:854-860.
Halle, I., and Tzschentke, B., 2011. Influence of temperature manipulation during the last 4 days of incubation on hatching results, post-hatching performance and adaptability to warm growing conditions in broiler chickens. Poultry Science, 48: 97-105.
Hulet, R., Gladys, D., Hill, D., Meijerhof, R., and El-Shiekh, T., 2007. Influence of eggshell embryonic incubation temperature and broiler breeder flock age on posthatch growth performance and carcass characteristics. Poultry Science, 86: 408-412.
Leksrisompong, N., Romero-Sanchez, H., Plumstead, P.W., Brannan, K.E., and Brake, J., 2009. Broiler incubation. 2.Interaction of incubation and brooding temperatures on broiler chick feed consumption and growth. Poultry Science, 88: 1321-1329.
Lourens, A., 2008. Embryo temperature during incubation: practice and theory. PhD Thesis, Wageningen University, The Netherlands, 123 p.
Melnychuk, V.L., Robınson, F.E., Renema, R.T., Hardın, R.T., Emmerson, D.A., and Bagley, L.G., 1997. Carcass traits and reproductive development at the onset of lay in two lines of female turkeys. Poultry Science, 76: 11971204.
Molenaar, R., Hulet, R., Meijerhof, R., Maatjens, C.M., Kemp, B., and Van Den Brand, H., 2011. High eggshell temperatures during incubation decrease growth performance and increase the incidence of ascites in broiler chickens. Poultry Science, 90: 624-632.
Nichelmann, M., 2004. Perinatal epigenetic temperature adaptation in avian species: comparison of turkey and muscovy duck. Journal of Thermal Biology, 29: 613-619.
Tzschentke, B., Basta, D., and Nichelmann, M., 2001. Epigenetic temperature adaptation in birds: peculiarities and similarities in comparison to acclimation. Nervus Biomedical Science, 1: 26-31.
Werner, C., Wecke, C., Liebert, F., and Wicke, M., 2010. Increasing the incubation temperature between embryonic day 7 and 10 has no influence on the growth and slaughter characteristics as well as meat quality of broilers. Animal, 4: 810-816.
Yahav, S., 2000. Domestic fowl-strategies to confront environmental conditions. Avian Poultry Biology Reviews, 11: 81-95.
Yahav, S., and McMurty, J.P. ,2001. Thermotolerance acquisition in broiler chicken by temperature conditioning early inlife: The effect of timing and ambient temperature. Poultry Science, 80: 1662- 1666.
Yahav, S., Collin, A., Shinder, D., and Picard, M., 2004. Thermal manipulations during broiler chick embryogenesis: Effects of timing and temperature. Poultry Science, 83: 19591963.
Yalçın, S., Babacanoğlu, E., Güler, H.C., and Akşit, M., 2010. Effects of incubation temperature on hatching and carcass performance of broilers.World's Poultry Science Journal, 66: 87-93.