Effect of Energy Deficiency at the End of Pregnancy on Sheep and Lamb Birth Weights

Öz

Abstract: This study was carried out in Chios breed pregnant sheep which created experimentally energy deficiency. To determine the effect of low energy feeding on the birth weights of sheep and lambs in the last period of pregnancy. 38 Chios breed sheep, 4-6 years old, were used in the study. The live weight weights of the ewes before the pregnancy were done on the zero day and the other weight weights on the days 120, 127, 134, 141 and 148 of the pregnancy. On the 105th day of pregnancy, pregnant and non-pregnant sheep were divided into 3 groups as normal energy pregnant group (PNE), deficient energy pregnant group (PLE) and non-pregnant normal energy group (N-PNE). From the 106th day of pregnancy to delivery; The pregnant sheep in the PNE group were fed with the ration containing 13% HP and 10 MJ / kg ME, the pregnant sheep in the PLE group were fed with ration containing 13% HP and 8.0 MJ / kg ME. The sheep in the N-PNE group were fed with ration containing 11% HP and 8.8 MJ / kg ME. PLE and N-PNE groups were found to have lower body weight than the PNE group. However, there was no statistical difference between these groups. In all pregnant sheep, body weight was higher than 120 days of pregnancy, it was found to be higher than day 0 (p <0,05) and after 120 days there was no statistically significant difference between groups. In the study, there was no statistically significant difference between the birth weights of PNE and PLE group. This can be explained by the fact that fetal growth is not affected by %13 HP ve 8.0 MJ / kg ME and does not cause serious energy deficiency in animals.

Anahtar Kelimeler

• Energy deficiency, ewe, lamb, live weight, pregnancy

Gebeliğin Sonunda Uygulanan Enerji Eksikliğinin Koyun ve Kuzu Doğum Ağırlıkları Üzerine Etkisi

Öz

Bu çalışma, deneysel olarak enerji eksikliği oluşturulan ikizlik oranı yüksek Sakız Irkı gebe koyunlarda, gebeliğin son döneminde düşük enerji ile beslenmenin, koyunların ağırlıkları ile yeni doğan kuzuların doğum ağırlıkları üzerine olan etkisini saptamak amacıyla yapıldı. Araştırmada ikizlik oranı yüksek, 4-6 yaşlarında, 38 adet Sakız ırkı koyun kullanıldı. Koyunların gebelik öncesi canlı ağırlıkları 0. gün, diğer ağırlık tartımları ise gebeliğin 120, 127, 134, 141 ve 148 günlerinde yapıldı. Gebeliğin 105. gününde gebe ve gebe olmayan koyunlar, normal enerjili gebe grup (PNE), yetersiz enerjili gebe grup (PLE) ve gebe olmayan normal enerjili grup (N-PNE) olarak 3 gruba ayrıldılar. Gebeliğin 106. günü ile doğum arası, PNE grubundaki gebe koyunlar %13 HP ve 10 MJ/kg ME içeren rasyon, PLE grubundaki gebe koyunlar %13 HP ve 8.0 MJ/kg ME içeren rasyon ile beslendi. N-PNE grubundaki gebe olmayan koyunlar ise %11 HP ve 8.8 MJ/kg ME içeren rasyon ile beslendi. Araştırmada PLE ve N-PNE grupları, PNE gruptan daha düşük vücut ağırlığına sahip olduğu tespit edildi. Ancak bu gruplar arasında istatistikî farkın olmadığı görüldü. Bütün gebe koyunlarda vücut ağırlığı gebeliğin 120. günü, 0. güne göre daha yüksek bulunmuş olup (p<0,05), 120. günden sonra ise gruplar arasında istatistiki olarak anlamlı bir fark saptanamadı. Çalışmada PNE ve PLE grubundaki yavruların doğum ağırlıkları arasında istatistikî bir farkın olmadığı görüldü. Bu durum, fötal büyümenin %13 HP ve 8.0 MJ/kg ME’den etkilenmediğini ve hayvanlarda ciddi bir enerji yetersizliğine yol açmamış olması ile açıklanabilir.

Anahtar Kelimeler

• Canlı ağırlık
• gebelik
• koyun
• kuzu
• yetersiz enerji

Kaynakça

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