Bark beetles (Coleoptera: Curculionidae: Scolytinae) are a speciose subfamily of weevils that primarily live in bark and consequently largely communicate using sound. Having colonized multiple countries outside its native range, Hylurgus ligniperda (Fabricius) is considered to be a successful invader, yet little is known about its acoustic communication. In the present study, we investigate individual sound production and dyadic interactions among males and females of H. ligniperda. Two temporal parameters (duration and inter‐note interval) and three spectral parameters (minimum, maximum and centroid frequencies) are used as descriptors to quantify call variations depending on behavioural context. We also present a method for automatically extracting and analyzing these calls, which allows acoustic discrimination amongst individuals. Hylurgus ligniperda exhibits sexual dimorphism in its stridulatory organ. Females do not produce stridulatory sounds, whereas males produce single‐noted calls and modify their spectro‐temporal parameters in accordance with context. Acoustic stimulation from nearby males does not appear to be a causative factor in such modification. Instead, hierarchical clustering analysis shows that physical interactions play a more important role in affecting call parameters than acoustic signals. Centroid and maximum frequencies are the largest contributors to the variability of the data, suggesting that call variations in H. ligniperda mainly occur in the spectral domain.

中文翻译：

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红毛树皮甲虫 Hylurgus ligniperda 的声学交流

树皮甲虫（鞘翅目：Curculionidae：Scolytinae）是象鼻虫的一个特殊亚科，主要生活在树皮中，因此主要通过声音进行交流。Hylurgus ligniperda (Fabricius) 在其本土范围之外殖民了多个国家，被认为是一个成功的入侵者，但对其声学交流知之甚少。在本研究中，我们调查了 H. ligniperda 雄性和雌性之间的个体声音产生和二元相互作用。两个时间参数（持续时间和音符间间隔）和三个频谱参数（最小、最大和质心频率）用作描述符来量化取决于行为上下文的调用变化。我们还提出了一种自动提取和分析这些调用的方法，该方法允许在个体之间进行声学区分。Hylurgus ligniperda 在其颤动器官中表现出两性异形。雌性不会发出刺耳的声音，而雄性会产生单音，并根据上下文修改它们的时空参数。来自附近雄性的声刺激似乎不是这种改变的诱因。相反，层次聚类分析表明，与声学信号相比，物理交互在影响呼叫参数方面起着更重要的作用。质心和最大频率是数据变异性的最大贡献者，这表明 H. ligniperda 的呼叫变化主要发生在谱域中。而雄性会发出单音并根据上下文修改它们的光谱时间参数。来自附近雄性的声刺激似乎不是这种改变的诱因。相反，层次聚类分析表明，与声学信号相比，物理交互在影响呼叫参数方面起着更重要的作用。质心和最大频率是数据变异性的最大贡献者，这表明 H. ligniperda 的呼叫变化主要发生在谱域中。而雄性会发出单音并根据上下文修改它们的光谱时间参数。来自附近雄性的声刺激似乎不是这种改变的诱因。相反，层次聚类分析表明，与声学信号相比，物理交互在影响呼叫参数方面起着更重要的作用。质心和最大频率是数据变异性的最大贡献者，这表明 H. ligniperda 的呼叫变化主要发生在谱域中。