Mustafa Kemal SARIBAY, Gökhan DOĞRUER, Yaşar ERGÜN, Fikret KARACA, Cafer Tayyar ATEŞ

ÜREME SEZONU DIŞINDA LAKTASYONDAKİ KIL KEÇİLERİNDE FLOUROGESTONE ACETAT İÇEREN VAJİNAL SÜNGERLERLE ÖSTRÜSLERİN UYARILMASI; GnRH VE hCG UYGULAMALARININ DÖL VERİMİ ÜZERİNE ETKİSİ

Çalýþma, üreme sezonu dýþýnda laktasyondaki Kýl keçilerinde flourogestone acetat (FGA) içeren vaginal süngerlerle östrüslerinuyarýlmasý ve süngerlerin çýkartýlmasýndan 48 saat sonra GnRH ve hCG uygulamalarýnýn dölverimi üzerine etkisini belirlemek amacýyladüzenlendi.Çalýþmada kullanýlan 60 baþ Kýl keçisi tesadüfi örnekleme yöntemi ile üç gruba ayrýldý. Gruplarýn tamamýna 30 mg FGA içeren vaginalsüngerler 14 gün süreyle uygulandý. Süngerlerin çýkartýlmasýndan 48 saat önce keçilere 500 IU PMSG ve 0.075 mg cloprostenol kasiçi enjekte edildi.Süngerler çýkartýldýktan 12 saat sonra, sürüye 9 baþ fertil teke katýlarak günde iki defa östrüsler tespit edildi ve aþýmlar gerçekleþtirildi.Süngerler çýkartýldýktan 48 saat sonra, GnRH grubuna (n=18) 5 mcg buserelin acetate, hCG grubuna (n=19) 500 IU human chorionicgonadotropin kas içi enjekte edildi, kontrol grubuna (n=18) ise hiçbir uygulama yapýlmadý.GnRH, hCG ve kontrol gruplarýnda östrüs oraný % 100 olarak belirlendi. Östrüsler, süngerlerin çýkartýlmasýndan 17 saat sonra baþladýve 48. saatlerde sona erdi. Keçilerin östrüs daðýlýmlarý süngerlerin çýkarýlmasýndan sonraki 17-24. saatler arasýnda % 51, 25-36. saatlerarasýnda % 11 ve 37-48. saatler arasýnda % 38 olarak saptandý. Gebelik oranlarý GnRH, hCG ve kontrol gruplarýnda sýrasýyla % 38.9,% 36.8 ve % 33.3 olarak belirlendi.Sonuç olarak; üreme sezonu dýþýnda laktasyondaki Kýl keçilerinde FGA,PMSG ve PGF2a kombinasyonunun östrüslerin uyarýlmasý vesenkronizasyonunda etkili bir yöntem olduðu, ancak süngerlerin uzaklaþtýrýlmasýndan 48 saat sonraki GnRH ve hCG uygulamalarýnýndöl verimini etkilemediði tespit edildi

Anahtar Kelimeler:

Keçi, anöstrüs, FGA, gonadotropinler, döl verimi

Estrous Induction In Lactating Hair Goats Outside the Breeding Season by Flourogestone Acetat Containing Vaginal Sponges; The Effect of GnRH and hCG Applications on Fertility

This study was carried out to determine the effect of FGA impregnated intravaginal sponges on the estrous induction andthe effect of GnRH anh hCG injections applied 48 h after sponge withdrawal on the reproductive preformance of the hair goats inanestrous season.Sixty lactating hair goats were randomly assigned to three groups and 30 mg FGA impreganted intravaginal sponges were inserted tothe vagina for 14 days. Fourty eight hours before sponge withdrawal, goats recieved 500 IU PMSG and 0.075 mg cloprostenolintramuscularly.Twelve hours after sponge withdrawal twice daily, the estrous was detected and the matings were carried out by 9 fertile bucks. Fourtyeight hours after sponge withdrawal; the GnRH group (n=18) recieved 5 mcg buserelin acetate, hCG group (n=19) recieved 500 IUhuman chorionic gonadotropin intramuscularly and no application was carried out in the control group (n=18).The estrous rate was found to be 100 % in all groups. The estrous initiated 17 h after sponge withdrawal and ended nearly 48 hours.The distribution of estrous in goats were detected to be 51% (17-24 hours), 11% (25-36 hours) and 38% (37-48 hours) after spongewithdrawal. The pregnancy rates in GnRH, hCG and control groups were 38.9%, 36.8 % and 33.3% respectivelyIt was concluded that FGA, PMSG and PGF2a combination was an effective method in the induction of estrous in lactating hair goatsin anestrous season but GnRH and hCG injection applied 48 hours after sponge withdrawal did not affect fertility parameters

Keywords:

Goat, anestrous, FGA, gonadotrophins, fertility,

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