Etlik piliçlerde embriyonun erken ve geç gelişim dönemlerinde yapılan yüksek ısıl uygulamaların ölüm oranına ve kan hormon düzeyine etkileri

Yıl 2015, Cilt: 28 Sayı: 2, 85 - 89, 23.12.2015

Özgür Barış Birgül Sezai Alkan

Öz

Bu çalışmada etlik piliçlerde kuluçka gelişiminin erken ve geç embriyonik dönemlerinde yapılan yüksek ısıl uygulamanın canlı ağırlığa ve yem tüketimine olan etkilerin belirlenmesi amaçlanmıştır. Bu amaçla kontrol grubu yumurtalarına 19. güne kadar optimum kuluçka koşulları olan 37.5 ^oC sıcaklık ve % 55 nem 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. Araştırmada toplam ölüm oranları kontrol, erken ve geç embriyonik dönem gruplarında sırasıyla % 15.1, 13.4 ve 13.4 olarak belirlenmiş olup gruplar arasında önemli bir farklılık saptanmamıştır. Kuluçkadan çıkışta en yüksek T₃ düzeyi (2.03±.090 ng/ml) ve en düşük kortikosteron düzeyi (3.95±1.34 ng/ml) kontrol grubunda saptanmıştır. Üçüncü haftada T₃ ve T₃/T₄ bakımından gruplar arasında önemli farklılık belirlenmiştir. Altıncı haftada kan hormon düzeyleri bakımından gruplar arasında herhangi bir farklılık bulunmamıştır.

Anahtar Kelimeler

Isıl uygulama, Etlik piliç, Kan hormonu, Ölüm oranı

Effect of high thermal manipulations during early and late embryogenesis on mortality rate and blood hormone level in broilers

Öz

The aim of this study was to determine the effect of thermal manipulations during early and late embryogenesis on mortality and blood hormone levels 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. In this study, mortality rates were determined as 15.1%, 13.4% and 13.4% for control, early and late embryonic periods, respectively, and differences among the groups were not found significant. In hatching, highest T3 and lowest korticosterone levels were determined in control group. There was found significant difference among the groups in terms of T3 and T3/T4 levels in the 3rd week. But, there was no significant difference among groups in point of blood hormone levels in the 6th week.

Anahtar Kelimeler

Thermal manipulation, Broiler, Blood hormone, Mortality rate

Kaynakça

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