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Bats coordinate sonar and flight behavior as they forage in open and cluttered environments.

Falk, Benjamin; Jakobsen, Lasse LU ; Surlykke, Annemarie and Moss, Cynthia F (2014) In Journal of Experimental Biology 217(24). p.4356-4364
Abstract
Echolocating bats employ active sensing as they emit sounds and listen to the returning echoes to probe their environment for navigation, obstacle avoidance, and pursuit of prey. The sensing behavior of bats includes the planning of 3D spatial trajectory paths, which are guided by echo information. In this study, we examined the relationship between active sonar sampling and flight motor output as bats changed environments from open space to an artificial forest in a laboratory flight room. Using high-speed video and audio recordings, we reconstructed and analyzed 3D flight trajectories, sonar beam aim and acoustic sonar emission patterns as the bats captured prey. We found that big brown bats adjusted their sonar call structure, temporal... (More)
Echolocating bats employ active sensing as they emit sounds and listen to the returning echoes to probe their environment for navigation, obstacle avoidance, and pursuit of prey. The sensing behavior of bats includes the planning of 3D spatial trajectory paths, which are guided by echo information. In this study, we examined the relationship between active sonar sampling and flight motor output as bats changed environments from open space to an artificial forest in a laboratory flight room. Using high-speed video and audio recordings, we reconstructed and analyzed 3D flight trajectories, sonar beam aim and acoustic sonar emission patterns as the bats captured prey. We found that big brown bats adjusted their sonar call structure, temporal patterning, and flight speed in response to environmental change. The sonar beam aim of the bats predicted the flight turn rate in both the open room and the forest. However, the relationship between sonar beam aim and turn rate changed in the forest during the final stage of prey pursuit, during which the bat made shallower turns. We found flight stereotypy developed over multiple days in the forest, but did not find evidence for a reduction in active sonar sampling with experience. The temporal patterning of sonar sound groups was related to path planning around obstacles in the forest. Together, these results contribute to our understanding of how bats coordinate echolocation and flight behavior to represent and navigate their environment. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Experimental Biology
volume
217
issue
24
pages
4356 - 4364
publisher
The Company of Biologists Ltd
external identifiers
  • pmid:25394632
  • wos:000346420200016
  • scopus:84925872611
ISSN
1477-9145
DOI
10.1242/jeb.114132
project
CAnMove
language
English
LU publication?
yes
id
953f48e8-1462-4cc3-8855-c72a74f2a09a (old id 4816746)
date added to LUP
2014-12-10 15:02:09
date last changed
2017-11-05 03:11:38
@article{953f48e8-1462-4cc3-8855-c72a74f2a09a,
  abstract     = {Echolocating bats employ active sensing as they emit sounds and listen to the returning echoes to probe their environment for navigation, obstacle avoidance, and pursuit of prey. The sensing behavior of bats includes the planning of 3D spatial trajectory paths, which are guided by echo information. In this study, we examined the relationship between active sonar sampling and flight motor output as bats changed environments from open space to an artificial forest in a laboratory flight room. Using high-speed video and audio recordings, we reconstructed and analyzed 3D flight trajectories, sonar beam aim and acoustic sonar emission patterns as the bats captured prey. We found that big brown bats adjusted their sonar call structure, temporal patterning, and flight speed in response to environmental change. The sonar beam aim of the bats predicted the flight turn rate in both the open room and the forest. However, the relationship between sonar beam aim and turn rate changed in the forest during the final stage of prey pursuit, during which the bat made shallower turns. We found flight stereotypy developed over multiple days in the forest, but did not find evidence for a reduction in active sonar sampling with experience. The temporal patterning of sonar sound groups was related to path planning around obstacles in the forest. Together, these results contribute to our understanding of how bats coordinate echolocation and flight behavior to represent and navigate their environment.},
  author       = {Falk, Benjamin and Jakobsen, Lasse and Surlykke, Annemarie and Moss, Cynthia F},
  issn         = {1477-9145},
  language     = {eng},
  number       = {24},
  pages        = {4356--4364},
  publisher    = {The Company of Biologists Ltd},
  series       = {Journal of Experimental Biology},
  title        = {Bats coordinate sonar and flight behavior as they forage in open and cluttered environments.},
  url          = {http://dx.doi.org/10.1242/jeb.114132},
  volume       = {217},
  year         = {2014},
}