Unlike earlier workers who tended to take an anthropocentric
view of the evolution of the vertebrate auditory
system, and emphasized specializations found in
amniotes, and especially mammals, we tend to take an
`ichthyocentric' approach to these issues and argue that
all vertebrates probably have very similar basic functional
requirements for their auditory systems. As a
consequence, all vertebrates investigated have evolved
similar functional approaches to sound detection and
analysis. Moreover, in a number of cases the structural
basis for detection and analysis, such as the heterogeneous
sensory hair cell, serves as the mechanism for
detection and initial analysis throughout the vertebrates.
Moreover, we would argue that specializations
found in certain vertebrates, such as the outer hair cell
motor of mammals, and the ability to use the auditory
system for echolocation, the detection of very high frequencies,
and other properties are only modi¢cations
on the basic themes that are as old as the vertebrates.
Indeed, this has become particularly apparent with the
discovery that some ¢shes, as many bats and toothed
whales, are able to detect ultrasound to over 150 kHz
Unlike earlier workers who tended to take an anthropocentric
view of the evolution of the vertebrate auditory
system, and emphasized specializations found in
amniotes, and especially mammals, we tend to take an
`ichthyocentric' approach to these issues and argue that
all vertebrates probably have very similar basic functional
requirements for their auditory systems. As a
consequence, all vertebrates investigated have evolved
similar functional approaches to sound detection and
analysis. Moreover, in a number of cases the structural
basis for detection and analysis, such as the heterogeneous
sensory hair cell, serves as the mechanism for
detection and initial analysis throughout the vertebrates.
Moreover, we would argue that specializations
found in certain vertebrates, such as the outer hair cell
motor of mammals, and the ability to use the auditory
system for echolocation, the detection of very high frequencies,
and other properties are only modi¢cations
on the basic themes that are as old as the vertebrates.
Indeed, this has become particularly apparent with the
discovery that some ¢shes, as many bats and toothed
whales, are able to detect ultrasound to over 150 kHz
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