季节性影响在早期哺乳期对多胞胎奶牛的行为
I M Toledo1, L T Casarotto2, G E Dahl2
1Institute of Food and Agricultural Sciences (IFAS) Extension, University of Florida, Gainesville, FL 32608.
JDS communications
|September 23, 2024
概括
季节性变化显著影响奶牛的行为和牛奶产量. 高热应激条件减少了吃饭和躺着的时间,甚至影响了冷却系统的整体生产率.
科学领域:
- 动物科学动物科学
- 环境生理学环境生理学
- 乳制品 畜牧业 乳制品 畜牧业
背景情况:
- 热应激会对奶牛的健康,生产力和生殖产生负面影响.
- 了解季节性行为变化对于在可变环境中管理奶牛至关重要.
研究的目的:
- 为了研究季节性变化如何影响多胎母乳母乳奶牛的行为.
- 为在不同的环境条件下管理哺乳奶牛提供见解.
主要方法:
- 自动监控设备 (腿部和部标签) 追踪了霍尔斯坦牛的行为 (躺着,吃饭,反,站立,步骤).
- 在炎热的季节 (7月至9月) 和凉爽的季节 (12月至2月) 收集的行为数据.
- 在分娩后的前9周分析了牛奶产量和成分.
主要成果:
- 高温湿度指数 (THI) 在炎热的季节 (78.2) 与凉爽的季节 (54.4).
- 在炎热的季节观察到的躺着时间,吃饭时间和反时间的减少.
- 在炎热的季节出现了更多的站立和站立时间; 步骤没有差异.
- 较低的牛奶蛋白和较高的牛奶脂肪百分比在凉爽的季节;在凉爽的季节更大的脂肪校正牛奶产量.
结论:
- 高THI会对奶牛的行为和每日时间预算产生负面影响,即使有冷却系统.
- 季节性行为变化,特别是减少躺着和吃饭,会影响牛奶的产量.
- 更好地了解季节性影响可以为减轻乳牛热应激影响的策略提供信息.
相关概念视频
00:55Parental Care
11.6K
Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
11.6K
00:53Migration
7.9K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
7.9K