Institute for Animal Physiology, Justus-Liebig University Giessen, Wartweg 95, D-35392 Giessen, Germany.
Zoology (Jena). 2011 Feb;114(1):29-35. doi: 10.1016/j.zool.2010.09.002. Epub 2011 Jan 13.
Males of the closely related African tettigoniids Acanthoplus discoidales and Acanthoplus longipes produce a long-lasting calling song and a short disturbance sound. The temporal patterns of the sounds were analysed in respect to species differences and song type differences. The calling songs of both species consist of impulses which are separated into verses of two syllables, with fewer impulses in the first syllable. A. longipes produces more impulses in each syllable than A. discoidales and has longer verse durations, verse intervals and syllable intervals. Also, the disturbance sounds, produced after mechanical stimulation, contain distinct verses of impulses. The disturbance sound of A. longipes has a higher number of impulses per verse than that of A. discoidales. The frequency spectra of the songs in both species have similar peak frequencies (around 12.5 kHz) and both species have their greatest hearing sensitivity in the range between 5 and 10 kHz. Females of A. longipes perform phonotaxis only to songs with a species-specific temporal pattern. By contrast, females of A. discoidales react positively to calling songs of both species.
亲缘关系密切的非洲蝼蛄属的雄性 Acanthoplus discoidales 和 Acanthoplus longipes 会发出持久的鸣叫声和短暂的干扰声。对这些声音的时间模式进行了分析，以研究物种差异和鸣叫声类型差异。这两个物种的鸣叫声都由脉冲组成，脉冲分为两个音节的诗句，第一个音节的脉冲较少。A. longipes 每个音节产生的脉冲比 A. discoidales 多，且诗句持续时间、诗句间隔和音节间隔都更长。此外，在受到机械刺激后产生的干扰声也包含明显的脉冲诗句。A. longipes 的干扰声每句的脉冲数比 A. discoidales 多。这两个物种的鸣声频谱都有相似的峰值频率（约 12.5 kHz），且这两个物种的最大听力敏感度都在 5 到 10 kHz 之间。A. longipes 的雌性只对具有特定物种时间模式的鸣叫声表现出音向性。相比之下，A. discoidales 的雌性对两种物种的鸣叫声都有积极的反应。
