Lateral Line Research: the Importance of Using Natural Stimuli
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underestimated the hydrodynamic reception capabilities of seals. Under natural
conditions the detection and decoding of complex historical hydrodynamic signals
in a world full of noise may be crucial for the survival of many aquatic animals.
This short review hopefully has illustrated that to understand hydrodynamic
reception requires detailed investigations of the physical structure of the
hydrodynamic environment in which an animal lives. It is now time to supplement
studies with stationary vibrating spheres in a low-noise environment with studies
in which dipole stimuli are applied in a noisy environment. In addition, more
natural, complex water motions, applied both in low- and high-noise environments, should be introduced in lateral line research. We believe that only if we ask
more subtle questions will we have a chance to uncover the full capabilities and
adaptations of the lateral line and other hydrodynamic sensory systems.
Acknowledgments. We thank TH Bullock, P Gomer and FG Barth for
commenting on the MS. Support for research reported here came from the German
Science Foundation (Bl242 7-1; Mo 718/2-1; De 538/5-1) and from the BMBF to
JM.
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