Induction of oestrus and conception rates in Bulgarian Murrah buffaloes after fixed-time artificial insemination
2011
Atanasov, A., Thracian University, Stara Zagora (Bulgaria) | Yotov, S., Thracian University, Stara Zagora (Bulgaria) | Antonov, A., Thracian University, Stara Zagora (Bulgaria) | Kolev, P., Private Veterinarian, Sevlievo (Bulgaria)
The aim of the present study was to investigate the effect of oestrus induction and timed artificial insemination on conception rates in Bulgarian Murrah buffaloes. Fifteen lactating non-primiparous buffaloes weighing 550-650 kg, fed and reared uniformly, were included in the survey. The animals were submitted to transrectal ultrasonography and divided into two groups depending on the ovarian follicle size: Group I - n=8 with follicle size 10 mm and group II - n10 mm. The Ovsynch protocol for oestrus synchronization and programmed insemination was used. The clinical signs of oestrus - uterine tone, oestral discharges, cervical passage, conception rates and oestrus signs in non-fertilized animals were determined. The results showed that follicle size could be used as a criterion in selecting candidates for oestrus and ovulation synchronization in buffaloes from the studied breed. Oestrus-related discharges were observed in considerably higher number of animals from group II - 71.4%; p0.05 as compared to group I - 37.5 %. This oestrus synchronization and scheduled insemination protocols could be successfully used in Bulgarian Murrah buffaloes.
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Эту запись предоставил Institute of Agricultural Economics