Walkowiak W, Capranica R R, Schneider H
Zoologisches Institut der Universität Bonn, Poppelsdorfer Schloss, D-5300 Bonn 1 Federal Republic of Germany.
Section of Neurobiology and Behavior, Division of Biological Sciences, Cornell University Ithaca, N.Y. 14853, U.S.A.
Behav Processes. 1981 Oct;6(3):223-37. doi: 10.1016/0376-6357(81)90002-4.
Multi-unit response from the torus semicircularis were recorded to obtain neural audiograms for five different species, subspecies and races of the genus Bufo:Bufo b.bufo, Bufo b. spinosus, two races of Bufo viridis, and Bufo americanus. All of the audiograms were clearly bimodal, with a low frequency peak and a high frequency peak. A less pronounced but distinguishable intermediate peak seems to be an indication of trimodality. In the low-frequency range, the audiograms of the five groups differed little or not at all. There were pronounced differences, however, in the high-frequency range. This frequency band includes the frequencies of the conspecific mating calls. The best matching between call frequency and auditory best frequency was found in the Bufo viridis group. While it is likely that factors other than the signal characteristics in the vocal repertoire may shape the sensitivity of the auditory system, it is notable that those anuran species in which the mating call clearly facilitates reproduction have a more pronounced sensitivity peak at the frequencies in their mating calls.
记录了半规管隆起的多单位反应，以获得蟾蜍属五个不同物种、亚种和种族的神经听力图：中华大蟾蜍指名亚种、中华大蟾蜍棘亚种、两种绿蟾蜍种族以及美洲蟾蜍。所有听力图均明显呈双峰，有一个低频峰值和一个高频峰值。一个不太明显但可区分的中间峰值似乎表明是三峰。在低频范围内，五组的听力图差异很小或根本没有差异。然而，在高频范围内存在明显差异。该频段包括同种交配叫声的频率。在绿蟾蜍组中发现叫声频率与听觉最佳频率之间的最佳匹配。虽然很可能除了发声库中的信号特征之外的其他因素可能塑造听觉系统的敏感性，但值得注意的是，那些交配叫声明显促进繁殖的无尾目物种在其交配叫声的频率处有更明显的敏感性峰值。
