No abstract

The aim of the present study was to determine the efficacy of the synchronization of oestrus using short- and long-term progestagen treatments in Hair goats at the onset of the breeding season, and to evaluate the effect of the exogenous GnRH administration immediately prior to short-term progestagen treatment on the reproductive performance. A total of 75 Hair goats, aged 2.5-5 years-old were used in this experiment. Goats were divided equally into three groups (n=25 per group). Animals in LT-FGA (long-term progestagen treatment), ST-FGA (short-term progestagen treatment) and Gn-ST-FGA (GnRH-short-term progestagen treatment) groups received an intravaginal sponge (day 0) containing 30 mg fluorogestone acetate (FGA) for 14, 8 and 8 days, respectively, plus 75 μg cloprostenol i.m. 24 h before sponge removal and 400 I.U. equine chorionic gonadotrophin (eCG) i.m. at the time of sponge removal. In addition, the goats in the Gn-ST-FGA group received 10.5 μg busereline acetate i.m. at the time of sponge insertion (day 0). Oestrus response for all treatment groups was 100%. The mean interval from sponge removal and the onset of oestrus for the LT-FGA, ST-FGA and Gn-ST-FGA groups was 28.0±1.0 h, 28.83±1.1 h and 33.1±2.0 h, respectively. No significant difference in onset of oestrus among groups was recorded. The pregnancy rate, kidding rate, multiple kidding rates and litter size were 72.0, 61.1, 45.5% and 1.6 in the LT-FGA, 70.8, 76.5, 69.2% and 1.8 in the ST-FGA and 58.3, 78.6, 63.6% and 1.6 in the Gn-ST-FGA groups, respectively. The pregnancy rates were similar in the LT-FGA (72.0%) and ST-FGA (70.8%). However, the kidding rate, multiple kidding rates and litter size were numerically higher in the ST-FGA (76.5%, 69.2% and 1.8, respectively) group than in the LT-FGA (61.1%, 45.5% and 1.6, respectively) group. Although not statistically different, pregnancy rate and litter size was lower in the Gn-ST-FGA group (58.3% and 1.6, respectively) compared with the ST-FGA (70.8% and 1.8, respectively). In conclusion, it can be said that oestrus synhcronization with long-term progestagen treatment (14 d-FGA- PGF2α- eCG) could be replaced with short-term progestagen treatment (8 d-FGA-PGF2α- eCG) without a reduction in oestrus rate and fertility parameters in lactating goats at the beginning of breeding season. However, the use of GnRH prior to short-term progestagen treatment (8 d-FGAPGF2α- eCG) do not have a positive effect on fertility parameters in goats

Ultrasonographic appearance of the testis and epididymis, and seminal characteristics, with regard to localization of spermatic granuloma were studied. In rams with spermatic granuloma (n = 9), diagnosed by clinical or ultrasonographic examinations before histopathological confirmation, localization of each lesion was recorded. Epididymal granulomas, caput and cauda, were seen as anechoic or hyperechoic areas with a distinct margin with or without a hyperechoic capsule. Granulomas in the testis were microscopic and, therefore, could not be detected by ultrasonography. Enlargement in the mediastinum testis was detected in all rams when there were granulomas in the caput. Heterogeneous testis parenchyma invaded by numerous hyperechoic foci, representing testicular degeneration, was associated with granulomas both in the epididymis and testis. Ultrasonographic appearance of the lesions did not differ with regard to season. Seminal characteristics varied between rams. It was concluded that ultrasonographic evaluation may give valuable information in the diagnosis of sperm granuloma in the ram.

No abstract

ÖzAmaç: Çalışmada FGA içeren süngerlerle östrüsleri uyarılan anöstrüsteki İvesi koyunlarında, eCG ve PGF2α enjeksiyonlarının süngerlerin çıkarıldığı anda veya 48 saat öncesinde uygulanmasının fertilite üzerindeki etkilerinin incelenmesi amaçlandı. Gereç ve Yöntem:Çalışma 80 İvesi koyun üzerinde yürütül-dü. Süngerler vaginada 12 gün tutuldu. Grup 1'deki (n=40) koyunlara süngerlerin çıkarıldığı anda, Grup 2'deki (n=40) koyunlara ise süngerlerin çıkarılmasından 48 saat önce 400 IU eCG ve 125 mcg kloprostenol kas içi yolla enjekte edildi. Ayrıca her iki gruptaki koyunlara süngerlerin çıkarılmasın-dan 40 saat sonra 5 mcg buserelin asetat kas içi yolla uygulandı.Bulgular: Östrüs başlangıç zamanı Grup 1 ve 2'de sırasıyla 35.08±1.75 ve 32.12±1.41 saat olarak saptandı. Östrüs, gebelik ve konsepsiyon oranları Grup 1'de sırasıyla %68.4, %55.2, %80.7 olarak hesaplanırken; Grup 2'de %89.4, %76, %85.2 olarak belirlendi. Kuzulama oranları Grup 1 ve 2'de sırasıy-la %95.2 ve %100 olarak belirlendi. İkizlik oranı ve kuzu verimleri sırasıyla Grup 1'de %50 ve %150 iken, Grup 2'de %31 ve %131 olarak tespit edildi. Grup 2'nin östrüs oranı Grup 1'den istatistik olarak yüksek (P<0.05) bulunmasına rağmen Gruplar arasında diğer fertilite parametrelerinde fark tespit edilmedi (P>0.05).Öneri: Koyunlarda süngerlerin çıkarıldığı anda eCG ve kloprostenolün enjekte edilmesiyle işgücü yönünden avantaj sağ-layacağı ifade edilebilir. Anahtar kelimeler: Koyun, anöstrüs, FGA, eCG, kloprostenol AbstractAim: The aim of this study was to compare the fertility obtained with eCG and PGF2α treatment, at time of FGA impregnated sponge withdrawal or 48 h before, in ewes during anoestrous season. Materials and Methods:Research was conducted on 80 ewes. The FGA containing sponges were maintained in the vagina for 12 days. Ewes received an intramuscular injection of 400 IU eCG and 125 mcg cloprostenol at the time of sponge withdrawal in the Group1 (n=40) and 48 hours before sponge removal in the Group 2 (n=40). Additionally, all of the ewes in the study received 5 mcg buserelin acetate intramuscularly 40 hours after the sponge withdrawal.Results: Intervals from sponge removal and the onset of estrus were 35.08±1.75 and 32.12±1.41 hours in Group 1 and Group 2, respectively. The estrus, pregnancy and conception rates were 68. 4%, 55.2%, 80.7% and 89.4%, 76%, 85.2% in the Groups 1 and 2, respectively. The twinning rate and litter sizes were 50% and 31%, 150% and 131% in the Groups 1 and 2, respectively. Estrus rate of Group 2 was statistically higher than Group 1 (P<0.05). No statistical difference was found in other fertility parameters between the groups (P>0.05). Conclusion:It may be stated that the injections of eCG and cloprostenol at the time of sponge removal is supposed an advantage for less requirement of visit to the farms.