| Sumario: | The reproductive performance of the ewe was
studied in San Jorge Farm, situated between 2.800
and 3.300 meters above sea level, 400 - 30' latitude
N and 740 - 12' W of Greenwich meridiam.
The studies were named: "Comparison of breeding seasons", "Effect of teasing and flushing in
ewe oestrus", "Age at first oestrus of ewe Lambs"
and "Mating ewes all the year round".
The results have shown that oestrus ocurred all
the year round and that ewe lambs experienced
their first heat between four and eight months of
age; there was no correlation between the oestrus
ocurrence on one hand and the age or live weight
on the other.
The conception rate was influence neither by
vasectomized rams nor by flushing.
Three crops of Lambs were obtained during two
years by the ewes running with rams all the year
round, but it was achieved only with a third of the
ewes envolved.
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