272 ewes were introduced to (1) rams without recent experience of oestrous ewes, (2) rams recently exposed to oestrous ewes, (3) and (4) oestrous ewes and rams with or without recent experience with oestrous ewes, or (5) remained isolated from rams. Serum testosterone concentration of rams was increased (P<0.05) equally when oestrous or anoestrous ewes were introduced. Exposure to oestrous ewes before or after introduction increased (P<0.05) the various measures of ram sexual behaviour directed towards anoestrous ewes. However, there was no statistical evidence that increased sexual activity resulted in an improvement in the ability of rams to stimulate ovulation in anoestrous ewes.
|Publication Title||Applied Animal Behaviour Science|
|Author Address||Department of Agriculture, The University of Reading, Whiteknights, P.O. Box, Reading RG6 6AT, UK.|
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