İn ovo T3 Hormonu Enjeksiyonunun Soğuk Stresine Maruz Kalan Etlik Piliçlerde Performans, Bazı Kan Parametreleri ve Oksidatif Stabilite Üzerine Etkileri

Yıl 2017, Cilt: 54 Sayı: 4, 489 - 496, 27.12.2017

Özge Altan , Zümrüt Açıkgöz Özer Hakan Bayraktar Fadime Aydın Köse Esra Karaduman

https://doi.org/10.20289/zfdergi.386715

Cited By: 2

Öz

Bu çalışma  in ovo T₃
hormonu enjeksiyonunun soğuk stresine maruz kalan etlik
piliçlerde performans, kan lipid profili, asites oluşumu ve oksidatif stabilite
üzerine etkilerini saptamak amacı ile yürütülmüştür. Bu amaçla, kontrol grubu
dışındaki döllü yumurtalara kuluçkanın 17. gününde 25 ng T₃ enjekte edilmiştir. Her iki grupta,
civcivlerin yarısı standart sıcaklıklarda yetiştirilirken diğer yarısına erken
(4-6. günler arasında 20±1 ⁰C) ve geç (35-37. günler arasında 15±1 ⁰C) yaşlarda düşük sıcaklık uygulanmıştır. İn ovo T₃ enjeksiyonu etlik piliçlerin performansını
önemli düzeyde etkilememiştir. Soğuk
stresi uygulaması 21. günde canlı ağırlığı ve yem tüketimini azaltmış ancak
yemden yararlanmayı etkilememiştir. Soğuk stresinden kaynaklanan büyüme performanstaki
gerileme kesim yaşına kadar telafi edilememiştir. Ölüm oranı bakımından gruplar
arasında önemli bir farklılık oluşmamıştır ve asites kaynaklı ölüm
görülmemiştir. Erken yaşlarda, soğuk stresi rektal sıcaklığı azaltırken in ovo T₃ enjeksiyonu hematokrit
değerini artırmıştır (P<0.05). Soğuk stresine maruz kalan piliçlerde kalp
oranı önemli düzeyde yükselmiştir. Glukoz, trigliserit, kolesterol, yüksek
yoğunluklu lipoprotein (HDL), düşük yoğunluklu lipoprotein (LDL) ve T₃
düzeyleri in ovo T₃
enjeksiyonundan önemli düzeyde etkilenmemiştir. Erken yaşta soğuk stresi
trigliserit düzeyini azaltmış ve kolesterol, HDL ve LDL konsantrasyonlarını
arttırmıştır (P<0.05). Geç yaşta soğuk stresi sadece LDL düzeyini önemli
düzeyde azaltmıştır. İn ovo T₃
enjeksiyonu ve soğuk stresi malondialdehit (MDA) ve trolox eşdeğer antioksidan
kapasite (TEAK) değerlerini etkilememiştir. İn ovo T₃ ve soğuk
stresi uygulamaları etlik piliçlerde oksidatif hasara neden olmamıştır.

Anahtar Kelimeler

Etlik piliç, in ovo T3 enjeksiyonu, soğuk stresi, performans, oksidatif stres, lipid peroksidasyonu

The Effects of In Ovo Injection of T3 Hormone on Performance, Some Blood Characteristics and Oxidative Stability in Broilers Exposed to Cold Stress

Öz

This study was conducted to determine the effects of in ovo injection
of T₃ hormone on performance, blood lipid profile, ascites and
oxidative stability in broilers exposed to cold stress. For this purpose, fertile eggs except control group were
injected with 25 ng T₃ on the 17^th day of incubation. In both groups, half of the
chicks were reared under at standart temperatures while the other half was
applied low temperature early (20±1⁰C from 4 to 6 d old) and late (15±1⁰C from 35 to 37 d old) ages. In ovo T₃ injection did
not significantly affect broiler performance. At 21 d of age, cold stress
treatment decreased body weight and feed intake but did not affect feed
conversion ratio. Growth depression due to cold stress might not be compensated
until slaughter age. There was no a significant difference in terms of
mortality and no deaths from ascites have been observed. At an early age, in
ovo T₃ injection increased hemotocrit value while cold stress
reduced rectal temperature (P<0.05). In broilers exposed to cold stress,
heart ratio significantly raised. The levels of glucose, triglyceride,
cholesterol, high density lipoprotein (HDL), low density lipoprotein (LDL) and
T₃ were not significantly affected by in ovo T₃
injection. Cold stress at an early age decreased triglyceride level and
increased cholesterol, HDL and LDL concentrations (P<0.05). Cold stress at
late age only significantly reduced LDL level. In ovo T₃
injection and cold stress did not affect malondialdehyde (MDA) and trolox
equivalent antioxidant capacity (TEAC) values. In ovo T₃ and
cold stress treatments did not cause oxidative damage in broilers.

Anahtar Kelimeler

Broiler, in ovo T3 injection, cold stress, performance, oxidative stress, lipid peroxidation

Kaynakça

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