Evolutionary aspects of bat echolocation

被引:92
作者
Neuweiler, G [1 ]
机构
[1] Univ Munich, Dept Biol 2, D-80333 Munich, Germany
来源
JOURNAL OF COMPARATIVE PHYSIOLOGY A-NEUROETHOLOGY SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY | 2003年 / 189卷 / 04期
关键词
D O I
10.1007/s00359-003-0406-2
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
This review is yet another attempt to explain how echolocation in bats or bat-like mammals came into existence. Attention is focused on neuronal specializations in the ascending auditory pathway of echolocating bats. Three different mechanisms are considered that may create a specific auditory sensitivity to echos: (1) time-windows of enhanced echo-processing opened by a corollary discharge of neuronal vocalization commands; (2) differentiation and expansion of ensembles of combination-sensitive neurons in the midbrain; and (3) corticofugal top-down modulations. The second part of the review interprets three different types of echolocation as adaptations to ecological niches, and presents the sophisticated cochlear specializations in constant-frequency/frequency-modulated bats as a case study of finely tuned differentiation. It is briefly discussed how a resonant mechanism in the inner ear of constant-frequency/frequency-modulated bats may have evolved in common mammalian cochlea.
引用
收藏
页码:245 / 256
页数:12
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