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首页> 外文期刊>The Journal of Experimental Biology >Phonotactic selectivity in two cryptic species of gray treefrogs: effects of differences in pulse rate, carrier frequency and playback level.
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Phonotactic selectivity in two cryptic species of gray treefrogs: effects of differences in pulse rate, carrier frequency and playback level.

机译：两种隐性树蛙的立体定向选择性：脉冲率，载波频率和回放电平差异的影响。

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The two main spectral components of the advertisement calls of two species of North American gray treefrogs (Hyla chrysoscelis and H. versicolor) overlap broadly in frequency, and the frequency of each component matches the sensitivity of one of the two different auditory inner ear organs. The calls of the two species differ in the shape and repetition rate (pulse rate) of sound pulses within trills. Standard synthetic calls with one of these spectral peaks and the pulse rate typical of conspecific calls were tested against synthetic alternatives that had the same spectral peak but a different pulse rate. The results were generalized over a wide range of playback levels. Selectivity based on differences in pulse rate depended on which spectral peak was used in some tests, and greater pulse-rate selectivity was usually observed when the low-frequency rather than the high-frequency peak was used. This effect was more pronounced and occurred over a wider range of playback levels in H. versicolor than in H. chrysoscelis when the pulse rate of the alternative was higher than that of the standard call. In tests at high playback levels with an alternative of 15 pulses s(-1), however, females of H. versicolor showed greater selectivity for the standard call when the high-frequency rather than the low-frequency spectral peak was used. This last result may reflect the different ways in which females of the two species assess trains of pulses, and the broad implications for understanding the underlying auditory mechanisms are discussed.
机译：两种北美灰树蛙（Hyla chrysoscelis和H. versicolor）的广告语的两个主要频谱成分在频率上广泛重叠，并且每种成分的频率与两种不同听觉内耳器官之一的敏感度匹配。这两个物种的声音在颤音内的声音脉冲的形状和重复率（脉冲率）不同。针对具有相同频谱峰值但脉冲频率不同的合成替代品，测试了具有这些频谱峰值之一的标准合成呼叫以及同种呼叫典型的脉冲频率。结果在广泛的播放级别上得到了概括。基于脉冲速率差异的选择性取决于在某些测试中使用的是哪个光谱峰，并且当使用低频而不是高频峰时，通常观察到更高的脉冲速率选择性。当替代品的脉搏频率高于标准品的脉搏时，这种效应在杂色嗜血杆菌中比在金边嗜血杆菌中更显着并且在更广泛的回放水平范围内发生。但是，在高回放级别的测试中，交替使用15个脉冲s（-1），当使用高频而不是低频频谱峰值时，杂色色母对于标准调用显示出更高的选择性。最后的结果可能反映了两个物种的雌性评估脉冲序列的不同方式，并讨论了对理解潜在听觉机制的广泛含义。

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