Mevsim İçi Östrüsü Uyarılan Saanen Irkı Keçilerde Tek ve Çift Doz GnRH Uygulamasının Gebelik Oranı Üzerine Etkisi

Bu çalışmanın amacı, üreme sezonunda östrüsü uyarılan Saanen ırkı keçilerin gebelik oranları üzerine buserelin asetat’ın etkisini araştırmaktı. Tüm keçilerin (n:57) östrüs uyarımları için; 12 gün süre ile 3 mg norgestomet içeren implant sol kulak üst yüzüne uygulandı ve implantın çıkarılmasını müteakip hemen 500 IU eCG ve 75 µg kloprostenol kas içi uygulandı. Keçilerin tamamı östrüs gösterdi ve doğal olarak tohumlandı. Keçiler üç gruba ayrıldı, Kontrol grubuna tohumlamadan hemen sonra 2 ml NaCl (n:19), tek doz GnRH grubuna tohumlamadan hemen sonra 4 µg buserelin asetat (n:19) ve çift doz GnRH grubuna tohumlamadan hemen sonra ve tohumlamadan 12 gün sonra 4 µg buserelin asetat (n:19) kas içi olarak uygulandı. Keçilerin çiftleşmesini takiben 35. günde B-Mode Real Time (5-7.5 MHz) ultrasonografi cihazı ile gebelik tanıları konuldu. Gruplar arası gebelik oranlarının (Kontrol: %68.42; Tek GnRH: %52.63 ve Çift GnRH: %47.37) istatiksel olarak farklı olmadığı (P>0.05) ve ortalama gebelik oranı %56.14 olduğu belirlendi. Sonuç olarak, tek veya çift doz GnRH (4 µg buserelin asetat) uygulamasının üreme sezonundaki keçilerin gebelik oranını artırmadığı tespit edildi.

Anahtar Kelimeler:

Gebelik oranı, GnRH, östrüs uyarımı, keçi

The Effect of Single and Double GnRH Injections on Pregnancy Rate of Saanen Goats Induced Estrus during the Breeding Season

The aim of the study was to investigate the effect of buserelin acetate on pregnacy rate of Saenen goats induced estrus in breeding season. To the estrus induction of all goats (n:57) were received ear implant with 3 mg norgestomet on the upper outside of the left ear for 12 days, plus 500 IU eCG i.m. and 75 µg d-cloprostenol i.m. at the time of implant removal. All goats showed the estrus behaviours and they were mated naturally. The goats were divided into three groups. The control group (n:19), received 2 ml NaCl i.m. immediately post mating; the single GnRH group (n:19), received 4 µg buserelin acetate i.m. immediately post mating; the double GnRH group (n:19), received 4 µg buserelin acetate i.m. immediately post mating and again same dose i.m. on the 12th day post mating. Pregnancy diagnosis was performed by B-Mode Real Time ultrasonography with a 5-7.5 MHz probe, 35 days after mating. The pregnancy rate was not statistically different (P>0.05) between the groups (Control: 68.42%; Single GnRH. 52.63% and Double GnRH: 47.37%) and the average pregnancy rate was 56.14%. In conclusion, single or double GnRH (4 µg buserelin asetat) administrations post mating did not improve the pregnancy rate in Saanen goats breeding season.

Keywords:

Estrus induction, GnRH, goat, pregnancy rate,

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