生产能力和年龄是否会影响牛体中循环的血清激素,甲状腺荷尔蒙和皮质醇的模式?
Giuseppe Bruschetta1, Arianna Bionda2, Renato Paolo Giunta3
1Department of Veterinary Sciences, University of Messina, Viale Palatucci 13, 98168 Messina, Italy.
Veterinary sciences
|October 25, 2024
概括
牛的激素水平,包括5-三胺 (5-HT) 和甲状腺激素 (THs),因年龄和生产类型 (牛奶与肉类) 而异. 奶牛的T3较低,T4随着年龄的增长而下降,影响了牛的生产力.
科学领域:
- 内分泌学 在内分泌学.
- 动物科学动物科学
- 兽医医学 兽医医学 兽医医学
背景情况:
- 牛的生产力受到复杂的内分泌调节的影响.
- 像5-基三胺 (5-HT),甲状腺激素 (THs) 和皮质醇等激素对肉类和牛奶产量至关重要的代谢途径产生影响.
- 了解这些荷尔蒙影响是优化畜牧业生产的关键.
研究的目的:
- 为了研究牛的牛奶或肉类嗜好和年龄如何影响牛体中循环的5-HT,THs和皮质醇度.
- 探索这些激素之间的潜在相互作用及其与生产特征的关系.
主要方法:
- 在三种品种的46只健康奶牛中分析了5-HT,皮质醇和THs (T3,T4).
- 使用酶相关免疫吸收试验 (ELISA) 量化5-HT和皮质醇,以及用于THs的免疫化学发光分析仪.
- 使用ANCOVA进行统计分析,以评估年龄,能力及其相互作用的影响.
主要成果:
- 与肉牛相比,奶牛表现出显著较低的三氨酸 (T3) 度.
- 甲状腺素 (T4) 含量随着年龄的增长而降低,无论是以牛奶生产为导向的牛还是以肉生产为导向的牛.
- 在以肉生产为导向的奶牛中,观察到T4,T3和5-HT之间的正相关性.
结论:
- 年龄和生产能力显著影响牛的关键激素度.
- 激素特征,特别是T3和T4水平,在乳品和肉品种之间存在差异,并且随着年龄的增长而变化.
- 这些发现提供了关于牛生产力的内分泌调节的见解,以及改善的潜在目标.
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