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Optic and echo-acoustic flow interact in bats.

Kathrin Kugler1,2, Harald Luksch3, Herbert Peremans4

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

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|February 8, 2019
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Summary
This summary is machine-generated.

Bats use both vision and echolocation to navigate. This study shows that optic and echo-acoustic flow interact, with echo-acoustic flow having a surprisingly strong effect, highlighting multimodal sensory integration for navigation and hunting.

Keywords:
EcholocationFlight guidanceFlow fieldMultimodal integrationNavigation

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Area of Science:

  • Sensory Ecology
  • Neuroethology
  • Animal Navigation

Background:

  • Echolocating bats navigate in darkness using sound echoes.
  • Bats can also use vision in dim light.
  • Optic flow guides many flying animals, and echo-acoustic flow guides bats in darkness.

Purpose of the Study:

  • To investigate how bats integrate visual and echolocation information for navigation in lighted environments.
  • To determine the relative contributions of optic and echo-acoustic flow in guiding bat navigation.

Main Methods:

  • Studied the bat species *Phyllostomus discolor* in lighted habitats.
  • Assessed the interaction between self-motion-induced optic flow and echo-acoustic flow.
  • Quantified the effect of each sensory modality on navigation behavior.

Main Results:

  • Optic and echo-acoustic flow interact to guide navigation in *Phyllostomus discolor*.
  • Echo-acoustic flow demonstrated a stronger influence on navigation than optic flow.
  • This indicates a significant multimodal interaction between vision and echolocation.

Conclusions:

  • Bats integrate information from vision and echolocation for navigation and hunting.
  • Multimodal sensory integration is crucial for bats navigating and foraging in complex environments.
  • This sensory combination is nearly unique to bats and toothed whales.