Effect of Controlled Environment on the Reproductive Performance of Ewes

Publisher Website
Google Scholar
Abstract
Four lots of 20 ewes each were used in a 3-year period to study the effects of light, temperature and a combination of light and temperature on reproductive performance. A fifth group of ewes was checked for estrus daily for the 3-year period. Half of the ewes in each of the five lots were produced in South Carolina. They were sired by Polwarth rams and were out of grade Rambouillet ewes. The other half of the ewes were purchased from Montana and were primarily of grade Rambouillet or Columbia x Rambouillet breeding. The percent of ewes exhibiting estrus in the control lot was significantly lower than in the light, temperature and combination light and temperature lots. Although not significant, the results favored the combination of light and temperature lots. The light, temperature and combination light and temperature lots had a significantly higher percent of ewes lambing than the control lot. Differences between those lots under controlled environmental conditions were not significant. Copyright © 1966. American Society of Animal Science. Copyright 1966 by American Society of Animal Science

This publication has 0 references indexed in Scilit: