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影响美国卡塔赫丁母羊生产寿命的因素

Luis F B Pinto^1,2, Ronald M Lewis³, Artur O Rocha²

¹Department of Animal Science, Federal University of Bahia, Salvador, BA, Brazil.

Journal of animal science

|November 25, 2024

概括

卡塔赫丁羊的生产生活受到育儿类型和羊羔体重的影响. 有多个子的母羊和更重的羔羊显示出更好的生存率,尽管整体寿命似乎与自愿杀实践有关.

科学领域:

动物科学动物科学
生殖生物学生殖生物学
绵羊生产系统绵羊生产系统

背景情况:

羊的生产寿命 (LPL) 对绵羊行业的可持续性和寿命至关重要.
了解影响卡塔丁羊LPL的因素对于繁殖计划至关重要.

研究的目的:

调查影响卡塔丁羊生产寿命的系统效应.
分析诸如出生养殖类型,母婴年龄和LPL上的羊羔体重等因素.

主要方法:

使用卡普兰-梅尔和考克斯比例危险模型分析了10,474只卡塔丁羊的LPL数据.
评估了四种考克斯PH模型,包括当代群体,母体年龄,育婴类型,第一个羔羊的年龄,平均羔羊出生体重 (ABW) 和平均羔羊断奶体重 (AWW).

主要成果:

当代组,出生养育类型,ABW和AWW显著影响了LPL (P <0.05).
雌羊出生在多个子产生更重的羔羊 (大约. 5公斤出生,20-25公斤断奶) 显示出更好的生存率.
第一次羊的年龄没有显著影响LPL;母的年龄的影响有限.

结论:

卡塔丁羊的寿命受到生殖特征和后代表现的影响.
卡塔丁羊的相对较低的LPL可能与基于羔羊体重的自愿除有关.
需要进一步的研究来区分自愿和非自愿的除,以告知繁殖目标.

关键词:

年龄的年龄年龄的年龄.危险的危险性危险的危险性羊羔的羊羔,就是羊羔.寿命长度寿命长度长寿长寿是一个问题.羊类羊类羊类羊类

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