Audiogram of the big brown bat (Eptesicus fuscus)

被引:67
作者
Koay, G
Heffner, HE
Heffner, RS
机构
[1] Department of Psychology, University of Toledo, Toledo
基金
美国国家卫生研究院;
关键词
chiroptera; evolution; hearing; mammal;
D O I
10.1016/S0378-5955(96)00208-0
中图分类号
R36 [病理学]; R76 [耳鼻咽喉科学];
学科分类号
100104 ; 100213 ;
摘要
The audiograms of three big brown bats (Eptesicus fuscus) were determined using a conditioned avoidance procedure. The average audiogram ranged from 0.850 kHz at 106 dB to 120 kHz at 83 dB SPL, with a best threshold of 7 dB at 20 kHz and a distinct decrease in sensitivity at 45 kHz. The results confirm those of a previous study by Dalland (1965a) that the big brown bat has good high-frequency hearing coupled with poor low-frequency hearing. Comparative analysis suggests that the bat's good high-frequency hearing initially evolved for passive sound localization and that it was later coopted for use in echolocation. In addition, the restricted low-frequency hearing of the big brown bat is typical of mammals with good high-frequency hearing.
引用
收藏
页码:202 / 210
页数:9
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