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Echo-acoustic flow affects flight in bats.

Kathrin Kugler1, Wolfgang Greiter2, Harald Luksch2

  • 1Division of Neurobiology, Department Biology II, LMU Munich, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany.

The Journal of Experimental Biology
|April 6, 2016
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Summary
This summary is machine-generated.

Bats use echo-acoustic flow, not just vision, for flight navigation. They adjust echolocation sounds based on flow, demonstrating a universal sensory flow principle for flying animals.

Keywords:
EcholocationFlight guidanceFlow fieldNavigationSonar

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Area of Science:

  • Animal behavior
  • Sensory neuroscience
  • Bioacoustics

Background:

  • Flying animals require rapid environmental response for navigation.
  • Visually guided animals use optic flow, while nocturnal bats rely on echolocation.
  • Echolocation provides explicit distance cues, unlike vision.

Purpose of the Study:

  • To investigate if bats utilize echo-acoustic flow for flight guidance.
  • To determine the influence of echo-acoustic flow on bat flight behavior in narrow passages.
  • To compare sensory flow principles across different sensory modalities.

Main Methods:

  • Observing bat flight in narrow passages with varying echo-acoustic properties.
  • Analyzing flight path adjustments in response to echo-acoustic salience.
  • Measuring echolocation sound levels and flight velocity.
  • Comparing bat responses to physical distance versus echo-acoustic cues.

Main Results:

  • Bat flight between lateral structures is significantly influenced by echo-acoustic salience, not just physical distance.
  • Bats reduced echolocation sound levels in stronger echo-acoustic flow.
  • Flight velocity was not reduced under stronger echo-acoustic flow.
  • Echolocation's explicit distance cues did not override echo-acoustic flow effects.

Conclusions:

  • Bats exploit echo-acoustic flow for navigating narrow passages.
  • Sensory flow is a fundamental principle for flight guidance in animals, applicable across different senses.
  • The findings highlight the adaptability of sensory systems for environmental navigation.