Effect of energy deficiency during late pregnancy in chios ewes on free fatty acids, $beta$ -Hydroxybutyrate and urea metabolites

Bu çalışmada deneysel olarak enerji eksikliği oluşturulan ikizlik oranı yüksek Sakız ırkı gebe koyunlarda, gebeliğin son döneminde düşük enerji ile beslenmenin koyunlarda gebelik toksemisi gibi metabolik bir hastalığın oluşup oluşmadığını serum serbest yağ asitleri, plazma (3-hidroksibütirat ve plazma üre konsantrasyonlarının seviyelerindeki değişikliklere bakarak saptamak amaçlanmıştır. Bu çalışmada 38 adet Sakız ırkı koyun kullanılmıştır. Hayvanlar, normal enerjili gebe grup, yetersiz enerjili gebe grup ve normal enerjili gebe olmayan grup olacak şekilde üç gruba ayrılmışlardır. Gebeliğin 105. gününden itibaren hayvanlar bulundukları gruplara uygun bir şekilde beslenmeye başlanmışlardır. Bu durum hayvanların doğumuna kadar devam etmiştir. Kan numuneleri gebeliğin 120, 127, 134, 141 ve 148. günlerinde koyunların vena jugularisinden heparinli vakumlu tüplerle alınmıştır. Yetersiz enerjili gebe koyunların 134. ve 148. günlerindeki serum serbest yağ asitleri konsantrasyonları normal enerjili gebe gruptakilere göre yüksek çıkmıştır. Yetersiz enerjili gebe gruptaki koyunların plazma [3-hidroksibütirat konsantrasyonları normal enerjili gebe gruptakilere göre daima yüksek çıkmıştır. Normal enerjili gebe koyunlarda plazma üre düzeyleri 127. günde anlamlı ölçüde azalmış, daha sonra artmaya devam etmiş ve yine 148. günde anlamlı ölçüde yüksek bulunmuştur. Sonuç olarak koyunlar gebeliğin son dönemlerinde 10 MJ/kg ME'den daha yüksek enerji içeren yemlerle beslenmelidir ve gebeliğin son dönemlerinde koyunların 8,0 MJ/kg ME ile beslenmesi gebelik toksemisine yol açmamıştır.

Sakız ırkı koyunlarda ileri gebelikte enerji noksanlığının serbest yağ asitleri, $beta$ -Hidroksibütirat ve üre metabolitleri üzerine etkisi

Pregnant Chios ewes with high twin-lambing rates fed a low energy ration during the final periods of pregnancy were studied. The aim of this study was to determine whether pregnancy toxemia occurred in these ewes by monitoring the changes in the concentrations of serum free fatty acids (FFAs), plasma (3-hydroxybutyrate (fi-HB) and urea. Thirty-eight Chios ewes were used. The animals were divided into 3 groups: pregnant normal energy (PNE), pregnant low energy (PLE), and non-pregnant normal energy (N-PNE). On day 105 of gestation, the animals were begun to be fed with the treatment rations. The feeding regime was continued until lambing. Blood samples were taken into tubes with and without anticoagulant from the jugular vein on days 120, 127, 134, 141, and 148 during gestation. The ewes in PLE had higher concentrations of FFAs on days 134 and 148 compared to those in PNE. (3-HB concentrations in PLE animals were always higher than those in PNE. No difference was found between PNE animals and N-PNE animals. Plasma urea concentration in PNE decreased on day 127, and then continuously increased to a significant level on day 148. It is concluded that an energy intake of greater than 10 MJ/kg ME should be ensured for pregnant ewes in late pregnancy, although an energy level of 8.0 MJ/kg ME does not cause a serious energy deficiency and does not cause pregnancy toxemia.

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