Ovulatory activity in native Thai goats

Ovarian activity was observed in native Thai goats run either alone, continuously with males, or intermittently with males at 56-day intervals between June 1985 and July 1986. Overall, the incidence of ovulation was highest in October and December (78.8%) and lowest in June (54.3%), with some does ovulating at every observation. The presence of males, either continually or intermittently, significantly increased the proportion of does ovulating throughout the year. The ovulation rate varied throughout the year, with the highest rate occuring in October 1985 (1.9) and the lowest rate in May and July 1986 (1.3). The implications of the study are discussed.