Personality, spatiotemporal ecological variation and resident/explorer movement syndromes in the sleepy lizard
Personality, spatiotemporal ecological variation and resident/explorer movement syndromes in the sleepy lizard
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DOI：
10.1111/1365-2656.13616
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发表时间：
2021-11-09
影响因子：
4.8
通讯作者：
Sih, Andrew
中科院分区：
文献类型：
--
作者：
Michelangeli, Marcus;Payne, Eric;Sih, Andrew
运动中的个体差异对健身非常重要，并为种群和社区的时空动态提供了关键见解。尽管如此，尽管动物跟踪设备在自然条件下提供了长期，高分辨率，可重复的数据，这些数据非常适合研究这种变化，但精细运动行为的个体差异很少被研究。此外，在少数考虑运动个体差异的研究中，更少的研究还考虑了驱动运动行为的内部特征和环境因素，这些因素对于将运动模式中的个体差异置于情境中是必要的。在这项研究中，我们GPS跟踪一个自由放养的人口沉睡的蜥蜴Tiliqua rugosa，每个南方春天超过5年，以检查一致的运动模式的个体差异，以及这些差异是如何介导的关键内部和生态因素。我们发现，个人一贯不同的一套每周的运动性状，这些性状强烈共变个体，形成运动综合征。蜥蜴属于一个主要的运动连续体，从“居民”，花了很长一段时间居住在较小的核心地区的家园范围，以“探险家”，移动更远的距离，探索更广阔的环境。重要的是，我们还发现，蜥蜴运动的这些一致差异与两种生态学上重要的动物个性特征（大胆和侵略性），它们的性别，环境的关键特征（包括食物供应和关键的水资源），栖息地类型和环境条件的季节变化（凉爽/潮湿与炎热/干燥）有关。从广义上讲，这些运动的专业化可能反映了生活史策略的变化，包括觅食和交配策略，这些策略最终构成了空间利用的关键差异。这些信息可用于将表型种群结构与关键的生态和进化过程联系起来，例如社交网络和疾病传播途径，进一步突出了研究运动行为中个体差异的价值。
Individual variation in movement is profoundly important for fitness and offers key insights into the spatial and temporal dynamics of populations and communities. Nonetheless, individual variation in fine-scale movement behaviours is rarely examined even though animal tracking devices offer the long-term, high-resolution, repeatable data in natural conditions that are ideal for studying this variation. Furthermore, of the few studies that consider individual variation in movement, even fewer also consider the internal traits and environmental factors that drive movement behaviour which are necessary for contextualising individual differences in movement patterns. In this study, we GPS tracked a free-ranging population of sleepy lizards Tiliqua rugosa, each Austral spring over 5 years to examine consistent among-individual variation in movement patterns, as well as how these differences were mediated by key internal and ecological factors. We found that individuals consistently differed in a suite of weekly movement traits, and that these traits strongly covaried among-individuals, forming movement syndromes. Lizards fell on a primary movement continuum, from 'residents' that spent extended periods of time residing within smaller core areas of their home range, to 'explorers' that moved greater distances and explored vaster areas of the environment. Importantly, we also found that these consistent differences in lizard movement were related to two ecologically important animal personality traits (boldness and aggression), their sex, key features of the environment (including food availability, and a key water resource), habitat type and seasonal variation (cool/moist vs. hot/drier) in environmental conditions. Broadly, these movement specialisations likely reflect variation in life-history tactics including foraging and mating tactics that ultimately underlie key differences in space use. Such information can be used to connect phenotypic population structure to key ecological and evolutionary processes, for example social networks and disease-transmission pathways, further highlighting the value of examining individual variation in movement behaviour.