TY - JOUR
T1 - Echolocation and flight behavior of the bat Hipposideros armiger terasensis in a structured corridor
AU - Warnecke, Michaela
AU - Falk, Benjamin
AU - Moss, Cynthia F.
N1 - Funding Information:
We thank Traia Roper, Daniel Schwartzbaum, Alexia Huggins, Sydney Donofrio, Grace Lee, and Eyal Li for help during data collection. We thank Dallas DeFord and Brittney L. Boublil for help with the audio analysis. We also thank three anonymous reviewers for comments on earlier versions of this manuscript. This research was supported by the ERP Graduate Fellowship of the Deutsche Studienstiftung to MW; the National Science Foundation IOS1460149 and 1734744, the Human Frontiers Science Program RGP0040, the Office of Naval Research N00014-12-1-0339, N00014-17-1-2736, and the Air Force Office of Scientific Research FA9550-14-1-0398. The authors declare no conflict of interest.
Publisher Copyright:
© 2018 Acoustical Society of America.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - In this study, the echolocation and flight behaviors of the Taiwanese leaf-nosed bat (Hipposideros armiger terasensis), which uses constant-frequency (CF) biosonar signals combined with a frequency-modulated (FM) sweep, are compared with those of the big brown bat (Eptesicus fuscus), which uses FM signals alone. The CF-FM bat flew through a corridor bounded by vertical poles on either side, and the inter-pole spacing of the walls was manipulated to create different echo flow conditions. The bat's flight trajectories and echolocation behaviors across corridor conditions were analyzed. Like the big brown bat, the Taiwanese leaf-nosed bat centered its flight trajectory within the corridor when the pole spacing was the same on the two walls. However, the two species showed different flight behaviors when the pole spacing differed on the two walls. While the big brown bat deviated from the corridor center towards the wall with sparse pole spacing, the Taiwanese leaf-nosed bat did not. Further, in comparison to E. fuscus, H. a. terasensis utilized different echolocation patterns showing a prevalence of grouping sounds into clusters of three. These findings indicate that the two species' distinct sonar signal designs contribute to their differences in flight trajectories in a structured corridor.
AB - In this study, the echolocation and flight behaviors of the Taiwanese leaf-nosed bat (Hipposideros armiger terasensis), which uses constant-frequency (CF) biosonar signals combined with a frequency-modulated (FM) sweep, are compared with those of the big brown bat (Eptesicus fuscus), which uses FM signals alone. The CF-FM bat flew through a corridor bounded by vertical poles on either side, and the inter-pole spacing of the walls was manipulated to create different echo flow conditions. The bat's flight trajectories and echolocation behaviors across corridor conditions were analyzed. Like the big brown bat, the Taiwanese leaf-nosed bat centered its flight trajectory within the corridor when the pole spacing was the same on the two walls. However, the two species showed different flight behaviors when the pole spacing differed on the two walls. While the big brown bat deviated from the corridor center towards the wall with sparse pole spacing, the Taiwanese leaf-nosed bat did not. Further, in comparison to E. fuscus, H. a. terasensis utilized different echolocation patterns showing a prevalence of grouping sounds into clusters of three. These findings indicate that the two species' distinct sonar signal designs contribute to their differences in flight trajectories in a structured corridor.
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U2 - 10.1121/1.5050525
DO - 10.1121/1.5050525
M3 - Article
C2 - 30180698
AN - SCOPUS:85052316813
SN - 0001-4966
VL - 144
SP - 806
EP - 813
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
IS - 2
ER -