Composite Brownian walks best explain the movement patterns of Asian black bears, irrespective of sex, seasonality, and food availability
Composite Brownian walks best explain the movement patterns of Asian black bears, irrespective of sex, seasonality, and food availability
复制标题
复合布朗行走最能解释亚洲黑熊的运动模式，无论性别、季节性和食物供应情况如何
DOI：
10.1111/1440-1703.12310
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发表时间：
2022
影响因子：
2
通讯作者：
Koike Shinsuke
中科院分区：
文献类型：
--
作者：
Ando Kyohei;Yoshikawa Tetsuro;Kozakai Chinatsu;Yamazaki Koji;Naganuma Tomoko;Inagaki Akino;Koike Shinsuke
大型独居食肉动物需要适应食物资源的空间和时间变化，因此预计会季节性和每年改变它们的运动策略。动物的运动策略也受到性别等内部因素的调节。我们通过拟合随机游走模型（包括布朗行走（BWs）、利维行走（LWs）和复合布朗行走（CBWs））来研究亚洲黑熊（Ursus thibetanus）在两个生物时期（交配期和贪食期）的运动策略。我们探索了最佳随机游走模型，该模型近似 29 只亚洲黑熊在不同食物供应年份获得的 59 条轨迹的运动路径。结果强烈支持其运动中 CBW 模式的出现优于无标度 LW 模式。我们发现最佳 CBW 模型在交配期和食欲亢进期之间的组成存在一些差异，但在性别和食物供应方面没有发现最佳模型之间存在显着差异。我们的研究结果表明，在测试的随机游走模型中，CBW 是描述亚洲黑熊运动的最佳模型，并表明了解其活动或运动的多种模式的重要性。
Large solitary carnivores need to correspond to spatial and temporal variations in food resources, and therefore are expected to change their movement strategies seasonally and annually. Movement strategy of an animal is also mediated by internal factors such as sex. We investigate movement strategy of Asian black bears (Ursus thibetanus) in two biological periods (mating and hyperphagia periods), by fitting random walk models including Brownian walks (BWs), Lévy walks (LWs), and composite Brownian walks (CBWs). We explored the best random walk models approximating the movement paths of 59 trajectories performed by 29 Asian black bears, obtained in years with different food availability. The results strongly supported the occurrence of CBW patterns over scale‐free LW patterns for their movements. We found some differences in composition of the best CBW models between mating and hyperphagia periods, though no distinctive differences were found among the best models regarding sex and food availability. Our findings demonstrated that the CBW is the best model to describe the movement of the Asian black bears among the random walk models tested, and indicate the importance of understanding multiple modes of their activity or movement.