Browsing by Author "Koyuncu, M."

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Reproductive performance with short-time controlled internal drug release (cidr)-based synchronization protocol for fixed-time artificial insemination in nulliparous and primiparous saanen goats
(Polska Akad Nauk, Polish Acad Sciences, Univ Warmia & Mazury Olsztyn, 2022-01-01) Altıncekiç, S. Öziş; ÖZİŞ ALTINÇEKİÇ, ŞENİZ; Koyuncu, M.; KOYUNCU, MEHMET; Bursa Uludağ Üniversitesi/Ziraat Fakültesi.; 0000-0001-9044-8092; AAG-8210-2021; JPL-0865-2023
In this study, it was aimed to evaluate the reproductive performance of primiparous and nulliparous Saanen goats following the insemination made ceivically via frozen commercial buck semen with short-time controlled internal drug release (CIDR, Eazi-Breed. Pfizer)-based synchronization. In the study, a total of 50 Saanen goats, 26 of which were aged 9 months and 24 of which were aged 2 years, were used. The CIDRs including 0.33 g of progesterone were applied to all the goats for 7 days and while the CIDRs were taken out of the vagina, the 500 IU equine chorionic gonadotropin (eCG) was injected intramuscularly. The first dose was administered in a fixed-time manner with mini straws of 0.25 ml including 300x10(6) motile frozen spermatozoa 24 hours after the injection without making estrus detection, and the second dose insemination was applied 24 hours later. In the study, although the pregnancy rate, fecundity, prolificacy and multiple birth rate values (83%, 1.25, 1.50 and 60%) obtained in the primiparous goats were found to be higher than those found in the nulliparous age group (80%, 0.84, 1.05 and 38%), they were not statistically significant. It was concluded that the effects of the CIDR-based double-dose insemination applications in the primiparous and nulliparous Saanen breed goats in breeding season for 7 days on fertility were similar and the cervical insemination method, a quick and more practical option compared to the intrauterine insemination, could be used successfully in both age groups.
The effects of short-mid-long term intravaginal sponge application on reproductive performance of Karacabey Merino ewes in the anestrous season
(Agricultural Research Communication Centre, 2019-01-01) Altınçekiç, Şeniz Öziş; Koyuncu, M.; ÖZİŞ ALTINÇEKİÇ, ŞENİZ; KOYUNCU, MEHMET; Uludağ Üniversitesi/Ziraat Fakültesi/Hayvan Bilimleri Bölümü; 0000-0001-9044-8092; 0000-0003-0379-7492; AAG-8210-2021; AAG-8536-2021; JPL-0865-2023
The aim of the present paper was to investigate the efficiency of different progestagen treatment methods in combination with Pregnant Mare Serum Gonadotrophin (PMSG) in Merino ewes outside the breeding season. A total of 78 ewes (2 to 4 years old) with a mean bodyweight of 58.4 kg and an average body condition score (BCS) of 3.5 were used in the trial. The ewes were randomly divided into 3 equal groups [n=26]. Intravaginal progestagen sponges containing Fluorogestone Acetate (FGA; 30 mg) were inserted intravaginally for different periods (7_days: short-term; 10_days: mid-term, 14_days: long-term). In all cases, 500 IU PMSG was administered intramuscularly at sponge withdrawal. The oestrus response, lambing rate, multiple birth rate, fecundity and litter size were [65.4, 61.5, 18.8 %, 0.77 and 1.25] in the short-term group; 80.8, 88.5, 34.8 %, 1.31 and 1.48 in the mid-term group; and 96.2, 92.3, 62.5 %, 1.50 and 1.63 in the long-term group, respectively. Oestrus manifestation and multiple birth rate were greater in long-term than in mid-and short-term groups, whereas for lambing rate, fecundity and litter size, better results were obtained in long- and mid-term than in short-term protocol. In conclusion, in Merino ewes, oestrus synchronisation outside the breeding season with long and mid-term progestagen treatment was found to be more effective than short-term treatment.