Akademik Veri Yönetim Sistemi
Kocatepe Veterinary Journal, cilt.12, sa.3, ss.357-362, 2019 (Hakemli Dergi)
Artificial insemination (AI) in goat is currently limited by the poor fertility obtained following the cervicalinsemination with frozen-thawed semen. The objective of the present study was to determine the efficiency offrozen semen use in two different breeding ages at Saanen goats. The effects of synchronization and fertility rateswere also examined. Ninety-eight (98) Saanen goats were divided into two groups: Group-1 = 49 (7-months-old)and Group-2 = 49 (19-month- old) does. Estrus was synchronized by impregnated intravaginal sponges (30 mg;fluogestone acetate, FGA), and i.m. administration of 50 µg of cloprostenol (PGF2α) and pregnant mare serumgonadotropin (PMSG, 500 IU), at 48 h before sponge removal. Cervical fixed time AI was carried out with frozensemen 43 h after removal of the sponges during the breeding season. Estrus was detected by teaser buck. Theoccurrence of estrus in Group-1 and Group-2 were 71.4%, 63.3%, respectively (p>0.05). Sixty-six (66) goats wereinseminated with frozen‐thawed semen. The pregnancy rate was determined by abdominal scanning. Pregnancyrates were (Group-1: 31.4%, Group-2: 32.3%) not differed significantly between age groups (p>0.05). Besides,higher lambing rates were obtained in Group-1 (145.5%) than in Group-2 (90.0%) due to increased prolificacyand reduced embryonic failure. In conclusion, Saanen goats in younger ages, starting from the 7 months old agecould be included in the breeding programs and could provide several benefits such as higher percentages ofsynchronization success and prolificacy.