Estrus synchronization in Awassi and Red Karaman fat tailed ewes
2003
Emsen, E. | Bilgin, O.C. | Yaprak, M. (College of Agriculture, Erzurum (Turkey). Department of Animal Science)Ockerman, H.W. (The Ohio State University, Columbus (USA). Department of Animal Science)
To evaluate the efficacy of estrus synchronization procedures 60 Awassi and 44 Red Karaman ewes were equally devied into 2 groups each. To synchronize estrus sheep in one group from each breed (group 1 and 2) were injected intramuscularly with PGF2+/- (1 ml) 10 days intervals, other two containing fluorogestone acetate (FGA; 40 mg) for 14 d. On the day of the PGF2+/- injection or at sponge removal, rams were placed with the ewes. The variability (standard deviation) of hours to estrus synchronization was significantly (P0.01) different from both breeds within treatment groups (PGF2+/- and sponges). The time of the estrus was significantly (P0.01) shorter in group 3 and 4 than in group 1. The number of ewes in estrus was greater (P0.05) in groups 3 and 4 than in groups 1 and 2. The time taken for onset of estrus for group 1, 2, 3 and 4 was 48.05+/-0.32, 45.45+/-0.17, 41.02+/-1.11 and 41.44+/-3.75 h, respectively. Estrus was induced with sponge withdrawal in almost 100 percent sheep while about 80 percent of ewes had been observed in estrus after the PGF2+/- injection within 3 d. It is concluded that Progestagen was better than PGF2+/- for synchronization of estrous in Awassi and Red Karaman ewes.
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