• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Journal of Animal Science >PSI-8 Comparison of heat stress behaviour between different Canadian Bos taurus cattle breeds using unmanned aerial vehicles
【2h】

PSI-8 Comparison of heat stress behaviour between different Canadian Bos taurus cattle breeds using unmanned aerial vehicles

机译：使用无人机航空公司不同加拿大博士金牛座牛养殖品种热应力行为的PSI-8比较

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Heat stress is an emerging cause of mortality and production loss in Bos taurus beef cattle production in North America. Despite the recent occurrence of extreme heat events in Canadian pastures and feedlots, there is very little heat stress research conducted in Canadian settings. The purpose of this study was to develop a non-invasive method to compare behavioral and physiological indices of heat stress between different Canadian cattle breeds. We used thermal imagery acquired by an unmanned aerial vehicle (UAV) to compare surface temperatures between two colour variants of Black Angus x Canadian Speckle Park calves on pasture. The mean back surface temperature for dark variants (n = 5) was 38.6 °C (SD = 4.9), whereas for light variants (n = 7) it was 31.3 °C (SD = 3.4). In the subsequent summer, we compared respiration rates between breeds varying in coat colour while in feedlot pens, including Black Angus, Red Angus, Hereford, Simmental, Charolais, the new Canadian Speckle Park composite breed and their various cross breeds. We recorded 4K video of cattle with a UAV positioned at nadir directly overhead at a height of ~10–15 m; respiratory behavior was analyzed later using Observer XT software. The mean respiration rate in breaths per minute (BPM) for black coated cattle (110 BPM, SD = 19) and red coated cattle (105 BPM, SD = 20) was higher than white coated cattle (94 BPM, SD = 21). We conclude that dark-coated cattle show heightened responses to hot temperatures due to increased absorption of solar radiation at the coat; as a result, dark-coated cattle are likely more susceptible to heat-stress related production losses than light-coated cattle under temperate summer weather conditions. We further conclude that UAVs are a novel and non-invasive tool to study cattle heat stress behavior in feedlot and pasture settings.
机译：热力应力是北美博斯金牛座牛肉产量的死亡率和生产损失的新兴原因。尽管最近发生了加拿大牧场和饲料的极端热事件，但在加拿大环境中进行了很少的热应力研究。本研究的目的是开发一种非侵入性方法，可比较不同加拿大畜牧业之间的热应力的行为和生理指标。我们使用了无人驾驶飞行器（UAV）获取的热图像，以比较牧场上的黑安格斯X加拿大斑点公园牛犊的两种颜色变种之间的表面温度。暗变体（n = 5）的平均背面温度为38.6℃（SD = 4.9），而对于光变体（n = 7），它为31.3℃（SD = 3.4）。在随后的夏天，我们将呼吸速率与外套颜色不同的呼吸率进行了比较，而在饲养案例中，包括黑安格斯，红色安格斯，赫里福德，Simmental，Charolais，新的加拿大斑点公园复合品种及其各种交叉品种。我们录制了4K视频的牛拍摄的牛，无人机位于Nadir，直接在〜10-15米的高度上直接开销;稍后使用观察者XT软件分析呼吸行为。黑色涂层牛（110bpm，sd = 19）和红色涂层牛（105bpm，sd = 20）的平均呼吸率（bpm）高于白色涂层牛（94bpm，sd = 21）。我们得出结论，由于涂层上的太阳辐射的吸收增加，暗涂的牛对热温度的反应提高;结果，在温带温带夏季天气条件下，深层涂层可能比涂层牛的热应力相关的生产损失更容易受到压力相关的产生损失。我们进一步得出结论，无人机是一种新颖的和非侵入性工具，用于研究饲料和牧场环境中的牛热应激行为。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号