Kıl keçilerinde ısı stresinin toplam oksidan kapasitesine etkisi

Abstract

Bu çalışmanın amacı, aynı sezonda farklı rakımlarda yetiştirilen farklı yaştaki kıl keçilerinde ısı stresinin toplam oksidan kapasite (TOC) üzerindeki etkisini araştırmaktı. Çalışmada Türkiye, Adana'nın 11 farklı ilçesinden 25 erkek 183 dişi olmak üzere 208 keçi kullanıldı. İlçeler rakım özelliklerine göre 0-99 m (Grup 1), 100-500 m (Grup 2) ve 500 m'den daha yüksek (Grup 3) olmak üzere gruplandırıldı. Keçiler ise 3 yaşından küçük ve 4 yaş ya da daha yaşlı olarak iki gruba ayrıldı. Kan örnekleri alınarak serumları çıkarıldı ve TOC analizine kadar -20°C'de saklandı. Isı stresi sıcaklık nem indeksine (THI) göre belirlendi. Grup 1 ve 2'de sırasıyla şiddetli ve orta dereceli ısı stresi vardı (P <0.001). TOC diğer gruplara göre grup 2'de anlamlı olarak düşük bulundu (P <0.001). En yüksek TOC grup 3'te ölçüldü (P <0.001) ve TOC değeri 4 yaş ve üzerindeki hayvanlarda 3 yaşın altındakilere göre anlamlı derecede yüksekti (P <0.05). Erkek keçiler dişi keçilerden anlamlı derecede daha yüksek THI'ye maruz kalmalarına rağmen (P <0.01), TOC seviyeleri benzer bulundu (P >0.05). Sonuç olarak, rakım, THI, yaş ve cinsiyet TOC üzerinde kompleks bir etkiye sahipti.

Keywords

• Isı stresi
• Kıl keçisi
• Rakım
• Toplam oksidan kapasitesi

The effect of heat stress on total oxidant capacity in hair goats

Abstract

Aim of this study was to investigate the effect of heat stress on total oxidant capacity (TOC) in hair goats grown at different altitudes in the same season. The study was carried out on 208 hair goats (25 male and 183 female) in 11 different districts of Adana province (Turkey) in the summer season. The districts were grouped as 0-99 m (Grop 1), 100-500 m (Group 2) and higher than 500 m (Group 3) according to altitude characteristics, and goats were classified into two groups as under 3 years and 4 years or older. Blood samples were collected, serums harvested and stored at -20°C until TOC analysis. Heat stress was determined according to temperature humidity index (THI). There were severe and moderate heat stress in groups 1 and 2, respectively (P<0.001). TOC was significantly lower in group 2 compared to the other groups (P<0.001). The highest TOC was measured in group 3 (P<0.001). And TOC was significantly higher in animals aged 4 and older compared to under 3 years of age (P<0.05). Although male goats were exposed to significantly higher THI than female goats (P<0.01), TOC levels were found similar in both groups (P>0.05). In conclusion, altitude, THI, age and gender had a complex effect on TOC.

Keywords

• altitute
• hair goat
• heat stress
• total oxidant capacity

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