黑素是否提高澳大利亚商业美利诺鱼群的双胞胎羊羔生存率?
Alyce M Lowe1, David O Kleemann1, Jennifer M Kelly1
1Turretfield Research Centre, South Australian Research and Development Institute, Department of Primary Industries Regions South Australia, Livestock Innovation and Welfare, Rosedale, SA 5350, Australia.
Animals : an open access journal from MDPI
|April 12, 2025
概括
在怀孕的美利诺羊群中补充黑素并没有改善商业羊群中的羊羔存活率或断奶体重. 这项研究发现,在广泛的放牧条件下,通过黑激素植入物增加羔羊产量没有实际好处.
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 绵羊生产
背景情况:
- 在研究环境中补充黑素已经显示出改善羔羊生存率和减少母羊的神经损伤的前景.
- 这种方法在广泛的农业系统中的商业可行性在很大程度上仍未被探索.
研究的目的:
- 评估在澳大利亚广泛放牧条件下对美利诺羊的黑激素补充剂的商业适用性.
- 为了确定黑激素植入物对多卵性双胞胎母羊的羊羔存活率和断奶体重的影响.
主要方法:
- 多双生双胞胎的美利诺羊 (n=1171) 被分配到黑激素植入物治疗或对照组.
- 在怀孕中期 (中位数为79天) 植入了一种黑激素装置 (Regulin®) 的母羊.
- 在南澳大利亚和西澳大利亚的三个商业地产中记录了羔羊的生存率和断奶重量.
主要成果:
- 黑素治疗没有显著影响尾部对接 (p=0.327) 或断奶 (p=0.546) 时的羔羊生存率.
- 在断奶时,小羊的整体存活率为对照群的74.7%,接受黑激素治疗的母羊的74.0%.
- 绵羊的断奶重量显示出微小,统计学上显著的差异 (p=0.020),对照平均为27.2公斤,接受黑激素治疗的绵羊平均为26.8公斤.
结论:
- 在怀孕中期,补充双胞胎孕产的美利诺母羊的黑激素并不是在商业农场提高羔羊生存率或断奶体重的实际策略.
- 这些发现表明,在这些条件下,黑素补充剂对商业绵羊生产没有显著的好处.
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