Studies on Awassi sheep in Lebanon:II. Reproduction of a flock bred at four month intervals

Author:

Rottensten Knud,Ampy Franklin

Abstract

SUMMARYBy alternately joining the rams with the ewes for two months and separating them for the following two months' period 63% of the lambings took place at eight-month intervals.The conception rate was 85% for October–November breedings, 58 for February–March and 43 for June–July. The twinning rates for corresponding periods were 38, 8 and 7. The length of the post-partum interval had no significant influence on the conception rate.For October–November breeding 63% of the lambings occurred between 150 and 169 days after the introduction of the rams, whereas the corresponding figures for February–March and June–July were 47 and 14, respectively.The yearly lambing percentage was 119 as compared to 86 for a previous period from 1955 to 1963, when the rams were kept with the flock throughout the year.

Publisher

Cambridge University Press (CUP)

Subject

Genetics,Agronomy and Crop Science,Animal Science and Zoology

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3