理解放牧牛群移动的时空模式。

Understanding the spatiotemporal pattern of grazing cattle movement.

机构信息

CSIRO Data61, Brisbane, Queensland, Australia.

出版信息

Sci Rep. 2016 Aug 24;6:31967. doi: 10.1038/srep31967.

Abstract

Understanding the drivers of animal movement is significant for ecology and biology. Yet researchers have so far been unable to fully understand these drivers, largely due to low data resolution. In this study, we analyse a high-frequency movement dataset for a group of grazing cattle and investigate their spatiotemporal patterns using a simple two-state 'stop-and-move' mobility model. We find that the dispersal kernel in the moving state is best described by a mixture exponential distribution, indicating the hierarchical nature of the movement. On the other hand, the waiting time appears to be scale-invariant below a certain cut-off and is best described by a truncated power-law distribution, suggesting that the non-moving state is governed by time-varying dynamics. We explore possible explanations for the observed phenomena, covering factors that can play a role in the generation of mobility patterns, such as the context of grazing environment, the intrinsic decision-making mechanism or the energy status of different activities. In particular, we propose a new hypothesis that the underlying movement pattern can be attributed to the most probable observable energy status under the maximum entropy configuration. These results are not only valuable for modelling cattle movement but also provide new insights for understanding the underlying biological basis of grazing behaviour.

摘要

理解动物运动的驱动因素对于生态学和生物学具有重要意义。然而,研究人员迄今为止还无法完全理解这些驱动因素,这主要是由于数据分辨率低。在这项研究中,我们分析了一组放牧牛的高频运动数据集,并使用简单的两状态“停止-移动”移动模型研究了它们的时空模式。我们发现,移动状态下的扩散核最好用混合指数分布来描述,这表明运动具有层次性质。另一方面,等待时间在一定的截止值以下似乎是标度不变的,最好用截断幂律分布来描述,这表明非移动状态受时变动力学的控制。我们探讨了观察到的现象的可能解释,包括在产生移动模式中可能起作用的因素,例如放牧环境的背景、内在决策机制或不同活动的能量状态。特别是,我们提出了一个新的假设,即潜在的运动模式可以归因于最大熵配置下最可能的可观察能量状态。这些结果不仅对牛群运动的建模有价值,而且为理解放牧行为的潜在生物学基础提供了新的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a8e5/4995401/9f519c2c74aa/srep31967-f1.jpg

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索