Evolutionary aspects of bat echolocation

  title={Evolutionary aspects of bat echolocation},
  author={Gerhard Neuweiler},
  journal={Journal of Comparative Physiology A},
  • G. Neuweiler
  • Published 28 March 2003
  • Biology
  • Journal of Comparative Physiology A
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… 

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  • E. Covey
  • Biology
    The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology
  • 2005
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Presentation of a CF-FM stimulus improved the duration sensitivity in IC neurons by increasing the ratio of duration-tuned neurons and making them less susceptible to changes in signal intensity.

Auditory opportunity and visual constraint enabled the evolution of echolocation in bats

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  • Biology
    Frontiers in Biology
  • 2010
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The observation of highly derived structures of the spiral ganglion in yangochiropteran bats: a trans-otic ganglions with a wall-less Rosenthal's canal is reported, providing direct evidence of how Yangchiroptera differentiated from Yinpterochioptera in spiral Ganglion neuroanatomy.

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Echolocation has most probably evolved in context with catching flying insects which is illustrated by the fact that all but one genus of the frugivorous Megachiroptera do not echolocate at all, but instead feature excellent night vision.

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The phylogeny of mormoopids, assessed by mitochondrial DNA analysis, shows a close relationship between the Pteronotus species, which suggests that major cochlear redesign, associated with the acquisition of echolocation-call specific co chlear processing in P. parnellii, has occurred within a relatively short evolutionary time scale.

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  • G. Schuller
  • Biology
    Journal of comparative physiology
  • 2004
Summary1.In awake Greater Horseshoe bats (Rhinolophus ferrumequinum) the responses of 64 inferior colliculus neurons to electrically elicited vocalizations (VOC) and combinations of these with

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The mammalian cochlea must extract loudness and frequency information about different and overlapping acoustic events from a single input channel and has developed macro- and micromechanical specializations and employs active processes that enhance frequency tuning and sensitivity.

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  • W. O'NeillN. Suga
  • Biology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1982
The auditory cortex of the mustached bat is explored using pairs of acoustic stimuli mimicking the multiharmonic biosonar signals (pulses) used by this species and their echoes to explore a new type of cortical organization which is not tonotopic but which represents an important acoustic cue related to the time course of acoustic events.

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A two-tone paradigm is used to examine responses of single units to combination stimuli in a brainstem structure, the nuclei of the lateral lemniscus (NLL), and suggests that the majority of these combinatorial responses originate in the ICC.

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  • RC Roverud
  • Biology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1993
Microchiropteran bats use an auditory sonar system for orientation and prey capture. Many bats use highly structured constant-frequency (CF) and frequency-modulated (FM) sonar orientation signals.