期刊
JOURNAL OF EXPERIMENTAL BIOLOGY
卷 213, 期 19, 页码 3348-3356出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jeb.044818
关键词
bats; classical pursuit; flight behavior; sonar beam pattern; jamming avoidance
类别
资金
- National Science Foundation [IBN-0111973]
- National Institutes of Health [R01-MH056366, R01-EB004750]
- William Hodos dissertation fellowship
- Ann G. Wiley dissertation fellowship
- Army Research Office [W911NF0610325]
- Air Force Office of Scientific Research [FA9550710446]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1460149, 1010193] Funding Source: National Science Foundation
Foraging and flight behavior of echolocating bats were quantitatively analyzed in this study. Paired big brown bats, Eptesicus fuscus, competed for a single food item in a large laboratory flight room. Their sonar beam patterns and flight paths were recorded by a microphone array and two high-speed cameras, respectively. Bats often remained in nearly classical pursuit (CP) states when one bat is following another bat. A follower can detect and anticipate the movement of the leader, while the leader has the advantage of gaining access to the prey first. Bats in the trailing position throughout the trial were more successful in accessing the prey. In this study, bats also used their sonar beam to monitor the conspecific's movement and to track the prey. Each bat tended to use its sonar beam to track the prey when it was closer to the worm than to another bat. The trailing bat often directed its sonar beam toward the leading bat in following flight. When two bats flew towards each other, they tended to direct their sonar beam axes away from each other, presumably to avoid signal jamming. This study provides a new perspective on how echolocating bats use their biosonar system to coordinate their flight with conspecifics in a group and how they compete for the same food source with conspecifics.
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