Evaluation of different methods of synchronization of estrus in sheep

In order to study the comparative effect of three techniques of oestrus synchronization and lambing concentration, 100 Corriedale ewes were randomly allotted to 4 groups of 25 ewes each, which were identified as follows: group C, trial group; group F, ewes exposed to a ram fitted with a harness, hence incapable of servicing; group T, ewes exposed to a ram fitted with a harness and treated with 2 doses of testosterone injected 5 days apart; and group P, ewes exposed to a ram fitted with a harness and treated with 2 doses of PG F2α. There was no contact among the groups for 15 days prior to the service. Later, the 4 groups were put together and the ewes were exposed to 10 rams for 60 days. The Kruskal-Wallis test was used to determine the effect of the treatment on early parturitions. Multiple comparison analyses were later made. A statistical analysis with contingency tables and a χ² test at 95% confidence level was used to determine differences in lambing concentration.   

• Main Authors: Barioglio, C., Varela, L., Ventura, J., Arnaudo, R., Bonardi, C., Campos, M., Rodríguez, T.
• Format: Online
• Language: spa
• Published: Facultad de Ciencias Agropecuarias 1991
• Subjects: sheep; estrus synchronization; prostaglandins; pheromones; ovinos; sincronización de celos; prostaglandinas; feromonas
• Online Access: https://revistas.unc.edu.ar/index.php/agris/article/view/2247