M. Bozkurt ATAMAN, Faruk ARAL, Abdullah KAYA, Cengiz Yıldız, Mehmet AKÖZ

Postpartum döneminde uygulanan PGF2 $alpha$ 'nın buzağılama-ilk tohumlama aralığı ve ilk tohumlamada gebe kalma oranı üzerine etkisi

Bu çalışmada, ineklerde postpartum 45. günden sonra uygulanan PGF2 $alpha$ 'nın buzağılama-ilk tohumlama ve ilk tohumlamada gebelik oranı üzerine etkisi araştırıldı. Materyal olarak İsviçre Esmeri ırkından 24 baş düve kullanıldı. İnekler tesadüfi örnekleme yoluyla üç gruba ayrıldı. I. gruptaki ineklere postpartum 45. günden itibaren günlük rektal muayene uygulandı. Ovaryumlannda aktif bir corpus luteum tespit edilen ineğe 0.150 mg d-cloprostenol enjekte edildi ve enjeksiyonu takiben 72 ve 96. saatlerde suni tohumlama uygulandı. II. gruptaki inekler 11 gün arayla 0.150 mg d-cloprostenol'den çift doz enjekte edilerek senkronize edildiler. İkinci enjeksiyonu takiben 72 ve 96. saatlerde tohumlamalar gerçekleştirildi. Üçüncü gruptaki hayvanlar kontrol grubu olarak tutuldu ve postpartum 45. günden sonra gözlenebilen ilk östrüslerinde tohumlandılar. Bir, iki ve üçüncü gruplarda buzağılama-ilk tohumlama aralığı ve gebelik oranları sırasıyla 57.4±1.68, 60.0±0.38 ve 82.5+6.40 gün (p0.05) olarak tespit edildi.

The effect of PGF2 $alpha$ administered in postpartum period on calving-pregnancy interval in the first insemination and pregnancy rates in cows

In this trial, the efficacy of PGF2OC administered after 45 days of calving-conception interval and pregnancy rates in the first insemination in cows were studied. Twenty-four cows were used as a materials. Cows were divided into three groups. Cows in 1 group were examined daily after 45 days,parturition by rectal palpation. After detection of corpus luteum, 0.150 mg d-cloprostenol were in¬jected intramuscularly and then cows were inseminated 72 and 96 horus. A prostaglandin analoque of d-cloprostenol were injected intamuscularly two times with 11 days interval at a dose of 0.150 mg per animal to the second group. All animals were inseminated 72 and 96 hours after second d-cloprostenol injection. Cows in 3 group were inseminated on the basis of observation of estrus signs after 45 days postpartum period. Calving-conception interval and pregnancy rates in the first insemination in group 1, 2 and 3 were 57.4+1.68, 60.0+0.38 ve 82.5±6.40 day (p0.05), respectively. As a conclusion, administration of d-cloprostenol in postpartum period could shorten calving-first insemination inter¬val.

PDF

___

1. Hinshelwood M M, Hansen P J, Hauser E R: Short estrus cycles in postpartum cows as influenced by level of milk production, suckling, diet, season of calving and interval to first estrus. Theriogenology, 18(4): 383-392, 1982. 2. Short R C, Bellows R A, Staigmiller R B, Berardinelli J G, Custer E E: Physiological mechanism controlling anestrus and infertility in postpartum beef cattle. J Anim Sci, 68, 799-816, 1990. 3. Smith R D: Estrus detection In "Current Therapy in Theriogenology" Edited by D A Morrow, 153-158, W B Sounders Comp, Philadelphia, 1986. 4. Wenkoff M: Estrus synchronization in cattle. In "Current Therapy in Theriogenology" Edited by D A Morrrow, 158-162, W B Sounders Comp, Philadelphia, 1986. 5. Plunkett S S, Stevenson J S, Call E P: Prostaglandin F2a for lactating dairy cows with a palpable cl but unobserved estrus. J Dairy Sci, 67, 380-387, 1984. 6. Elmarimi A A, Gibson D, Morrow D, Marteniuk J, Gerloff B, Melaneon J: Use of PGF2CC in the Treatment of unobserved estrus in lactating dairy cattle. Am J Res, 44 (6): 1081-1084, 1983. 7. Revah I, Zarco L, Galina C S, Serratos G: Effect of PGF2oc on Onset of ovarian activity in two dairy herds in Mexico. 1 lth Int Congr On Anim Reprod Sci, And A I, 4, 409, University College Dublin, Irish Republic, 1988. 8. Semacan A: Postpartum sorunlu ve normal ineklerde PGF20C kontrollü tohumlamaların fertilite üzerine etkisi. Vet Bil Derg, 10(1-2): 105-110, 1994. 9. Young I M, Anderson D B, Plenderleith W J: Increased Conception rate in dairy cows after early postpartum adminitration of prostaglandin F2 alpha THAM. Vet Rec, 115:429-431,1984. 10. Etherington W G, Martin S W, Bonnett B, Johnson W H, Miller R B, Savage N C, Walton J S, Montgomery M E: Reproductive performance of dairy cows following tre¬atment with cloprostenol 26 and/or 40 days postpartum. A Fielt Trial, Theriogenology, 29(3): 565-575, 1988. ll.Jeffery J W: When and why prostaglandins are used in postpartum dairy cows. Vet Med, 647-651, 1991. 12. Saraç S: İneklerde Postpartum dönemde PGF20C GnRH uygulamaları ve farklı tohumlama yöntemlerinin reprodüktif performansa etkileri üzerine çalışmalar. Doktora Tezi, AÜ Sağlık Bilimleri Enstitüsü, Ankara, 1992. 13. Glanvill S F, Dubson H: Effect of prostaglandin treatment on the fertility of problem cows. Vet Rec, 128: 374-376, 1991. 14. Whitter W D, Gwazdauskas F C, McGilland M L: PGF2a Usage in a dairy reproduction program for treatment of unobserved estrus, pyometra and ovarion luteal cysts. Theriogenology, 32(4): 693-704, 1989. 15. Younquist R S, Bierscwal C J: Clinical management of reproductive problems in dairy cows. J. Dairy Sci, 68: 2817-2826, 1985. 16. Inskeep E K, Lishman A W: Factors affecting postpartum anestrus in beef cattle. Anim Reprod Sci, 2: 277-286, 1978. 17. Martinez J, Thibier M: Fertility in anoestrous dairy cows following treatment with prostaglandin F2oc or the Synthetic analogue fenprostalane. The Vet Rec, 7: 57-58, 1984. 18. Humblot P, Thibier M: Progesterone monitoring of anestrous dairy cows and subsequent treatment with a prostaglandin F2a analog or gonadotropin releasing hormone. Am J Vet Res, 41(11): 1762-1766, 1980. 19. Etherington W G, Christie K A, Walton J Ş, Leslie K E, Wickstrom S, Johnson W H: Progesterone profiles in postpartum holstein dairy cows as a aid in the study of retained fetal membranes, pyometra and anestrus. Theriogenology, 36(5): 731-746,1991.