Six Dutch-type and nine New Zealand White rabbits were each ejaculated at frequencies of 1 × 12 hr, 1 × 24 hr and 2 × 48 hr. Ejaculate volume and sperm concentration were lower (P<0·01) at 1 × 12 hr than at either of the other two frequencies. Daily sperm output did not differ significantly among the three frequencies. Dutch-type rabbits had a significantly lower daily sperm output than New Zealand Whites.
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