Ovulation-liveweight relationships in ewes

J.F. Smith, P.V. Rattray, K.T. Jagusch, N.R. Cox, H.R. Tervit

Ruakura Animal Research Station, Hamilton

Proceedings of the New Zealand Society of Animal Production. 1979, 39: 50-55

Ovulation rate data, from experiments in which different levels of nutrition were imposed on ewes in the pre-mating period, were analysed by the fitting of linear models, following logit transformation, to determine the effect of the nutritional treatments and other explanatory variables (e.g. liveweight and liveweight change). Major effects of pasture allowance, pasture yield and silage supplementation over and above that due to liveweight were observed. Static liveweight accounted for less than 30% of the difference between treatments.

Keywords: NZSAPAB;

Last Updated 12-09-1998