The artificial insemination of Australian goats stimulated by the buck effect.

Observations during artificial insemination programs with Australian goats in April of 1985 and 1986 showed that does were not generally ovulating before joining,but exposure to males induced ovulation 3 days later in a high proportion. A small proportion (20-25%) of ovulations was accompanied by oestrus. Does not conceiving appeared to ovulate again 5 days later and most showed oestrus. Fertility to a single insemination of fresh semen at the first oestrus for 1985 and 1986 was 18.9% and 53%, while at the second oestrus it was 82.4% and 81.7% respectively. The exposure to males appeared to initiate reproductive activity in the does, synchronise oestrus and ovulation and potentiate fecundity.