Muhammed Nevzat ALGAN, Mehmet UÇAR, Oktay YILMAZ

Effect of fluorogestone acetate and eCG on reproductive parameters in lactating Pırlak ewes

It was aimed to determine the effect of intravaginal sponges impregnated with different doses of fluorogestone acetate (FGA) on some reproductive parameters in 360 Pırlak ewes at 30-60 days postpartum. The positive control group (n = 130) was treated with 30 mg of FGA for 12 days. On the sponge removal day, 600 IU of equine chorionic gonadotropin was injected intramuscularly and rams were joined into flocks 36 h later. Halved intravaginal sponges containing FGA were applied in the experimental group (n = 100) with the same protocol as in the positive control group. The estrous behavior of ewes in the negative control group (n = 130) was followed by joining rams into the flock without any treatment protocol. There was no significant difference in estrus, conception, lambing, single and twining rates, or single and twining rates per lambing between groups. The second estrus rate was 59.5% and 78.3% in the positive control and experimental group, respectively. Total lambing rate following first and second estrus was higher in the experimental group than in the positive control. The ewes in the negative control group did not show estrous behavior during the first or second estrus of other groups. It was concluded that the insertion of halved intravaginal sponges impregnated with 30 mg of FGA could cause more economical estrus synchronization.

Keywords:

Halved sponge, fluorogestone acetate anestrus, estrus synchronization, Pırlak,

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Goulet F, Castonguay FW. Influen ce of lambing to rebreeding interval on ewe reproductive performance in the anestrous season. Can J Anim Sci 2002; 82: 453-456.
Wildeus S. Current concepts in synchronization of estrus: sheep and goats. J Anim Sci 2000; 77: 1-14.
Letelier CA, Contreras-Solis I, Garcia-Fernandez RA, Ariznavarreta C, Tresguerres JAF, Flores JM, Gonzalez- Bulnes A. Ovarian follicular dynamics and plasma steroid concentrations are not significantly different in ewes given intravaginal sponges containing either 20 or 40 mg of fluorogestone acetate. Theriogenology 2009; 71: 676-682.
Goodman RL, Karsh FJ. Pulsatile secretion of luteinizing hormone: differential suppression by ovarian steroids. Endocrinology 1980; 107: 1286-1290.
Leyva V, Buckrell BC, Walton JS. Regulation of follicular activity and ovulation in ewes by exogenous progestagen. Theriogenology 1998; 50: 395-416.
Crosby TF, Boland MP, Gordon L. Effect of progestagen treatments on the incidence of oestrus and pregnancy rates in ewes. Anim Reprod Sci 1991; 24: 109-118.
Faure AS, Boshoff DA, Burger FJL. The effect of whole and halved intravaginal sponges combined with either subcutaneous or intravenous administration of PMSG on synchronization of the estrous cycle of Karakul ewes. S Afr Tydskr Veek 1983; 13: 157-160.
Greyling JPC, Erasmus JA, Taylor GJ, Van Der Merwe S. Synchronization of estrus in sheep using progestagen and inseminating with chilled semen during breeding season. Small Rum Res 1997; 26: 137-143.
Kaşıkçı G, Cirit Ü, Gündüz MC, Bacinoğlu S, Sabuncu A. Effects of halving intravaginal sponges and eCG dose on estrus response and fertility in Tahirova ewes during the breeding season. Turk J Vet Anim Sci 2011; 35: 193-199.
Ataman MB, Aköz M, Findik M, Saban E. Induction of synchronized oestrus in Akkaraman cross-bred ewes treated with prostaglandine f2 alpha, norgestomet and sponges impregnated with different doses of fluorogestene acetate at the beginning transitional period. Kafkas Univ Vet Fak 2009; 15: 801-805 (in Turkish with an English abstract).
Vinoles C, Forsberg M, Banchero G, Rubianes E. Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes. Theriogenology 2001; 55: 993-1004.
Uçar M, Gündoğan M, Özdemir M, Tekerli M, Eryavuz A, Saban E, Özenç E. Synchronization of oestrus in different sheep breeds by progesterone+eCG and investigation of cholesterol and progesterone levels. Eurasian Journal of Veterinary Sciences 2002; 18: 79-85 (in Turkish with an English abstract).
Abdullah AY, Husein MQ, Kridli RT. Protocols for estrus synchronization in Awassi ewes under arid environmental conditions. Asian-Aust J Anim Sci 2002; 15: 957-962.
Amer HA, Hazzaa AM. The effect of different progesterone protocols on the reproductive efficiency of ewes during the non-breeding season. Vet Arhiv 2009; 79: 19-30.
Kulaksız R, Daşkın A, Dalcı T. Some reproductive traits of ewes from different breeds following oestrus synchronisation by flugeston acetate- eCG during the breeding season. Atatürk Üniversitesi Veteriner Bilimleri Dergisi 2011; 6: 9-15 (in Turkish with an English abstract).
Kulaksız R, Uçar Ö, Daşkın A. Effects of FGA sponge and Ovsynch based protocols on reproductive performance of fat- tailed ewes during the breeding season. Kafkas Univ Vet Fak 2013; 19: 629-633.
Üstüner B, Günay U, Nur Z, Üstüner H. Effects of long and short-term progestagen treatments combined with PMSG on oestrus synchronization and fertility in Awassi ewes during the breeding season. Acta Vet Brno 2007; 76: 391-397.
Ergül Ekiz EE, Ekiz B, Koçak Ö. Effects of ram presence during synchronization period and previous experience on certain estrus parameters and sexual behaviors in Kıvırcık ewes. Turk J Vet Anim Sci 2013; 37: 189-193.
Ungerfield R, Rubianes E. Short term primings with different progestogen intravaginal devices (MAP, FGA and CIDR) for eCG-estrous induction in anestrous ewes. Small Rum Res 2002; 46: 63-66.
Kılıç İ, Bozkurt Z, Tekerli M, Koçak S, Çelikeloğlu K. A study on animal welfare standards in traditional sheep breeding enterprises. Ankara Univ Vet Fak 2013; 60: 201-207.
Fuentes VO, Gonzalez H, Sanchez VM, Fuentes PI. Effect of small doses of naloxone on the pulsatile secretion of prolactin in the crossbreed ewe during the non-breeding season. Anim Reprod Sci 2007; 100: 44-50.
Kridli RT, Abdullah AY, Husein MQ. The effect of breed type and lactation status on reproductive performance in Awassi ewes. South African J Anim Sci (Supplement 1) 2009; 39: 15- 18.
Koyuncu M, Altiçekiç O. Effects of progestagen and PMSG on estrous synchronization and fertility in Kivircik ewes during natural breeding season. Asian-Aust J Anim Sci 2010; 23: 308- 311.
Zaiem I, Tainturier D, Chemli J, Soltani M. Vaginal sponges and different PMSG doses to improve breeding performances of Black Thibar ewes. Rev Med Vet 1996; 147: 305-310.
Aköz M, Bülbül B, Ataman MB, Dere S. Induction of multiple births in Akkaraman cross-bred sheep synchronized with short duration and different doses of progesterone treatment combined with PMSG outside the breeding season. Bull Vet Inst Pulawy 2006; 50: 97-100.