Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland.
Sci Rep. 2023 Dec 20;13(1):22750. doi: 10.1038/s41598-023-49851-2.
Free-roaming domestic dogs (FRDD), as vectors of zoonotic diseases, are of high relevance for public health. Understanding roaming patterns of dogs can help to design disease control programs and disease transmission simulation models. Studies on GPS tracking of dogs report stark differences in recording periods. So far, there is no accepted number of days required to capture a representative home range (HR) of FRDD. The objective of this study was to evaluate changes in HR size and shape over time of FRDD living in Chad, Guatemala, Indonesia and Uganda and identify the period required to capture stable HR values. Dogs were collared with GPS units, leading to a total of 46 datasets with, at least, 19 recorded days. For each animal and recorded day, HR sizes were estimated using the Biased Random Bridge method and percentages of daily change in size and shape calculated and taken as metrics. The analysis revealed that the required number of days differed substantially between individuals, isopleths, and countries, with the extended HR (95% isopleth value) requiring a longer recording period. To reach a stable HR size and shape values for 75% of the dogs, 26 and 21 days, respectively, were sufficient. However, certain dogs required more extended observational periods.
自由放养的家犬（FRDD）作为人畜共患病的传播媒介，与公共卫生密切相关。了解犬类的漫游模式有助于设计疾病控制计划和疾病传播模拟模型。关于使用 GPS 跟踪犬类的研究报告显示，记录时间存在明显差异。到目前为止，还没有公认的需要多少天的时间来捕获 FRDD 的代表性家域（HR）。本研究的目的是评估生活在乍得、危地马拉、印度尼西亚和乌干达的 FRDD 的 HR 大小和形状随时间的变化，并确定捕获稳定 HR 值所需的时间。给狗戴上 GPS 项圈，总共得到了 46 个数据集，至少记录了 19 天。对于每只动物和记录的每一天，使用有偏随机桥方法估计 HR 大小，并计算和采用大小和形状的日变化百分比作为指标。分析表明，个体、等势线和国家之间所需的天数有很大差异，扩展的 HR（95%等势线值）需要更长的记录时间。为了使 75%的犬只达到稳定的 HR 大小和形状值，分别需要 26 天和 21 天。然而，某些犬只需要更长的观察期。
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