Use of prostaglandin F2 alpha as a method for synchronizing estrus in sheep
Estrus synchronization was studied by three methods on 120 adult ewes Merino Precoz Frances. Four groups of 30 ewes were treated as follows: C - Control: The ewes were isolated from rams until the beginning of the mating period (Dec. 16, 1981). P - Prostaglandins: The ewes were treated with two dose...
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Facultad de Ciencias Agropecuarias
1983
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/agris/article/view/910 |
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| Sumario: | Estrus synchronization was studied by three methods on 120 adult ewes Merino Precoz Frances. Four groups of 30 ewes were treated as follows: C - Control: The ewes were isolated from rams until the beginning of the mating period (Dec. 16, 1981). P - Prostaglandins: The ewes were treated with two doses of PG F2 alfa (16 mg each time): one at the beginning of mating and the other 9 days later. CH - The ewes were maintained with a ram chastity harness from the 15th day before the beginning of mating. CP - These ewes received the combined treatment of the P and CH groups. The early lambing was analyzed by a statistical model of the random design and the concentration of lambing was studied by the "t" method, which was also used to establish the prolificity of the ewes. The results showed that 100% (30 ewes) presented estrus 48–72 hs after the second injection of PG, which were fertile as it could later be demonstrated. No fertility differences, no prolificity differences, as well as no differences in birth weight, could be established among the treatments. The treatment of the CP group showed to be more effective (62%). Early pregnancy was established between the CP group and CH-CP groups, but no differences were observed among the different groups of treatments. The lambing during the first 16 days was different for the CP and CH groups (P < 0,01). |
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