Walkowiak W
Zoological Institute, University of Bonn, Poppelsdorfer Schloss, D 5300 Bonn 1 F.R.G.
Behav Processes. 1980 Dec;5(4):363-72. doi: 10.1016/0376-6357(80)90019-4.
Multi-unit recordings from the torus semicircularis of the fire-bellied toad (Bombina bombina L.) and the grass frog (Rana t. temporaria L.) were used to obtain threshold vs. frequency curves for these anurans. The effect of body temperature on these audiograms was tested over a range of 10-28° C for the toad and 5-20° C for the frog. The range of frequencies audible to the fire-bellied toad at a body temperature of 21° C extends to 2400-3000 Hz. Threshold is relatively low in three regions: 300-450 Hz, 700-900 Hz and 1200-1700 Hz. The auditory system is most sensitive in the low frequency region. The audiograms of both species depend greatly on temperature. As temperature is increased sensitivity is enhanced, particularly at low and intermediate frequencies. Grass frogs are maximally sensitive at temperatures as low as 15° C, whereas the auditory threshold of fire-bellied toads continue to fall as the temperature is raised from 16° C to 22° C. Hearing evidently is adapted to different temperature ranges in the two species, and these correspond to the temperatures at which the animals engage in mating behavior.
采用对铃蟾（Bombina bombina L.）和林蛙（Rana t. temporaria L.）半规管隆起的多单元记录，来获取这些无尾两栖类动物的阈值-频率曲线。在10-28°C范围内测试了体温对铃蟾听力图的影响，在5-20°C范围内测试了对林蛙听力图的影响。铃蟾在体温为21°C时可听频率范围延伸至2400-3000Hz。在三个区域阈值相对较低：300-450Hz、700-900Hz和1200-1700Hz。听觉系统在低频区域最为敏感。两种动物的听力图都极大地依赖于温度。随着温度升高，敏感性增强，尤其是在低频和中频。林蛙在低至15°C的温度下最为敏感，而铃蟾的听觉阈值在温度从16°C升至22°C时持续下降。显然，两种动物的听力适应于不同的温度范围，且这些温度范围与动物进行交配行为时的温度相对应。
