将加速度计与度计结合起来,以估计实验室内校准不可用时,以焦尔计算每日能耗
Pritish Chakravarty1,2,3, Gabriele Cozzi4,5, David Michael Scantlebury6
1Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. chakravartypritish@gmail.com.
Movement ecology
|May 30, 2023
概括
研究人员开发了新的方法,使用加速度计来估计动物的能量消耗,在没有昂贵的实验室工作的情况下,在水猫身上提供现实的每日能量消耗 (DEE) 测量.
科学领域:
- 动物生理学 动物生理学
- 生态能源生态能源学
- 生物制造技术的技术.
背景情况:
- 测量动物的能量消耗量以焦尔为单位,对于理解生态过程至关重要.
- 动物传播的加速度计提供动态身体加速度 (DBA) 作为能量消耗的代理.
- 将DBA转换为能量单位通常需要昂贵的实验室呼吸计,其替代方案有限.
研究的目的:
- 校准动物传播的加速度计,使用全度方程来估计每日能源消耗 (DEE).
- 开发和验证模型,用自由放牧动物的加速数据来估计DEE.
- 为了将基于模型的DEE估计与传统的双标记水 (DLW) 测量进行比较.
主要方法:
- 利用能量消耗与身体质量的全度关系来校准DBA.
- 开发了两个模型 (ACTIWAKE和ACTIREST24) 来估计DEE.
- 创建了一个算法来估计从加速度计和陀螺仪数据的运动速度.
- 将模型应用于自由活动的鱼,并将结果与DLW数据进行比较.
主要成果:
- 在ACTIWAKE模型中,DEE估计与DLW测量没有显著差异.
- ACTIREST24模型的DEE估计显示出与DLW测量的显著差异.
- 这两种模型都低估了DEE与DLW相比 (ACTIWAKE为14%,ACTIREST24为26%).
- 模型估计显示,与DLW测量相比,个体间的差异较小.
结论:
- 在清醒期间以运动为基础的校准和睡眠期间的标准休息代谢率为陆地哺乳动物提供了现实的DEE估计.
- 加速度计主要捕捉与运动相关的能源支出,这解释了与集成DLW措施相比低估的情况.
- 该研究提供了将体质,行为时间预算和强度整合到基于加速的DEE评估中的工具.
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