Among-population divergence in personality is linked to altitude in plateau pikas (Ochotona curzoniae)
Among-population divergence in personality is linked to altitude in plateau pikas (Ochotona curzoniae)
复制标题
高原鼠兔（Ochotona curzoniae）的群体间性格差异与海拔有关
DOI：
10.1186/s12983-019-0329-6
复制
发表时间：
2019-07-08
影响因子：
2.8
通讯作者：
Zhang, Yanming
中科院分区：
文献类型：
--
作者：
Qu, Jiapeng;Reale, Denis;Zhang, Yanming
背景生活在高海拔地区的动物总是表现出缓慢的生活史。生活步速综合征(POLS)假说提出了行为、生理和/或形态特征，这些特征调节着当前和未来的生殖或生存之间的权衡，这些特征沿着一个慢-快的生命历史连续体共同进化。以往的研究表明，高原鼠兔的生活史随海拔的不同而不同，高海拔个体的生活节奏较慢，其特点是每年产仔少，产仔数小。因此，我们假设较高海拔的鼠兔种群也会表现出与缓慢生活史相关的个性特征，如高社会性、低活跃性或攻击性。我们通过比较沿青藏高原海拔梯度分布的三个高原鼠兔(Ochotona Curzoniae)种群的活动和驯化程度来检验这一假设。结果对556只鼠兔的行为进行了量化，其中120只被测量了至少两次。我们观察到，高原鼠兔在高海拔地区不那么活跃，比低海拔地区的鼠兔更温顺。高海拔地区人群活动性与柔韧性显著负相关，而低海拔地区人群则不显著。结论本研究结果支持POLS假说，强调了海拔梯度分布人群中人格差异的存在，强调了环境选择对人格差异的重要性。
BackgroundAnimals inhabiting high altitudes consistently show slow life-histories. The pace-of-life syndrome (POLS) hypothesis posits behavioural, physiological and/or morphological traits that mediate the trade-off between current and future reproduction or survival, which have coevolved along a slow-fast life history continuum. Previous studies have shown that the life histories of plateau pikas varied across altitude, high-altitude individuals showed slow pace of life which were characterized by few litters per year with small litter sizes. Thus, we hypothesized that pikas populations at higher altitudes would also express personalities characteristic associated with slow life history, such as high sociability, low activity or aggressiveness. We tested this hypothesis by comparing the activity and docility of three plateau pika (Ochotona curzoniae) populations distributed along an altitudinal gradient of the Tibetan Plateau. We predicted that high-altitude pika would be more docile and less active.ResultsThe behaviour of 556 pikas, from which 120 individuals were measured at least twice, was quantified. We observed that plateau pikas at high altitudes were less active and more docile than pika at lower altitudes. Activity and docility were significantly and negatively correlated in populations from high altitudes but not in populations from low altitudes.ConclusionsOur results support the POLS hypothesis, highlight the existence of personality variation among populations distributed along an altitudinal gradient and emphasise the importance of environmental selection on personality divergence.