The effect of early nutrition and hogget oestrus on subsequent
reproduction
R.W. Moore and H-U.P. Hockey
Whatawhata Hill Country Research Station, Hamilton and Ruakura
Agricultural Research Centre, Hamilton
Proceedings of the New Zealand Society of Animal Production.
1982, 42: 41-44
Two experiments investigated the relationship between growth
rate, hogget oestrus and subsequent reproduction. In Experiment 1 there
were increases in the proportion of two-tooth ewes ovulating multiples
due to high plane rearing from late December to mid July or the presence
of hogget oestrus, after the correction of two-tooth pre-mating live
weight. None of the four-tooth lambing differences due to rearing or
hogget oestrus was significant after correction for two-tooth pre-mating
live weight. There were no significant differences due to any factor at
the six-tooth lambing.
In Experiment 2 there was an increase in the proportion of two-tooth
ewes twinning due to the presence of hogget oestrus after correction for
two-tooth pre-mating weight. There were significant effects of hogget
oestrus on four-tooth twinning rates, before but not after, correction
for two-tooth pre-mating live weight. There were no significant effects
on twinning at the six-tooth lambing.
Keywords: NZSAPAB;
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