Data from: Stay tuned: active amplification tunes tree-cricket ears to track temperature-dependent song frequency

Tree cricket males produce tonal songs, used for mate attraction and male–male interactions. Active mechanics tunes hearing to conspecific song frequency. However, tree cricket song frequency increases with temperature, presenting a problem for tuned listeners. We show that the actively amplified frequency increases with temperature, thus shifting mechanical and neuronal auditory tuning to maintain a match with conspecific song frequency. Active auditory processes are known from several taxa, but their adaptive function has rarely been demonstrated. We show that tree crickets harness active processes to ensure that auditory tuning remains matched to conspecific song frequency, despite changing environmental conditions and signal characteristics. Adaptive tuning allows tree crickets to selectively detect potential mates or rivals over large distances and is likely to bestow a strong selective advantage by reducing mate-finding effort and facilitating intermale interactions.树蟋（Tree Cricket）雄性个体可发出具有音调特征的鸣曲，此类鸣曲用于配偶吸引以及雄性间的交互竞争。主动听觉力学机制可将其听觉系统调谐至同种鸣曲的频率。然而，树蟋的鸣曲频率会随环境温度升高而上升，这给已完成调谐的听觉接收者带来了适配难题。本研究发现，主动放大的听觉频率同样会随温度变化而调整，借此改变力学与神经元层面的听觉调谐特性，从而维持与同种鸣曲频率的匹配。尽管多个生物类群（taxa）中均已发现主动听觉过程，但这类过程的适应性功能却鲜有实证验证。本研究证实，树蟋可借助主动听觉过程，在环境条件与信号特征发生变化时，始终维持听觉调谐与同种鸣曲频率的匹配。这种适应性调谐机制可使树蟋在远距离范围内精准识别潜在配偶与竞争对手，并通过降低配偶搜寻成本、优化雄性间交互行为，从而赋予其显著的选择优势。