| Presentation | 2011/1/13 Characteristics of ultrasonic echolocation pulse of FM bats (Pipistrellus abramus) in a cluttered environment Toshiya TAKENAGA, Yukako KAGAMI, Emyo FUJIOKA, Shizuko HIRYU, Hiroshi RIQUIMAROUX, Yoshiaki WATANABE, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Changes in the terminal frequency (TF; the end frequency of downward FM sweep) of echolocation pulses were investigated by using Telemike for two FM bat species (Pipistrellus abramus and Miniopterus fuliginosus) in a cluttered environment. P abramus emitted pulses in pairs (strobe group) with 20-40 ms interpulse intervals (IPIs), which occasionally created pulse-echo ambiguity. When overlap occurred, variation of the ΔF was significantly increased to 5-6 kHz (F-test, P < 0.001). On the other hand, M fuliginosus never emitted pulses in a strobe group. Since IPIs were always adjusted to be longer than ESD, echo streams were not overlapped. These comparative results indicate that by shifting TF within successive pulses, P abramus separate between their own echo streams to avoid pulse-echo ambiguity. Our findings also suggest that echolocation strategy in the cluttered environment may be different between bat species. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Miniopterus fuliginosus / Cluttered echo / Terminal frequency / Telemike |
| Paper # | US2010-104 |
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| Committee | US |
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| Conference Date | 2011/1/13(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Characteristics of ultrasonic echolocation pulse of FM bats (Pipistrellus abramus) in a cluttered environment |
| Sub Title (in English) | |
| Keyword(1) | Miniopterus fuliginosus |
| Keyword(2) | Cluttered echo |
| Keyword(3) | Terminal frequency |
| Keyword(4) | Telemike |
| 1st Author's Name | Toshiya TAKENAGA |
| 1st Author's Affiliation | Faculty of Engineering, Doshisha University() |
| 2nd Author's Name | Yukako KAGAMI |
| 2nd Author's Affiliation | Faculty of Engineering, Doshisha University |
| 3rd Author's Name | Emyo FUJIOKA |
| 3rd Author's Affiliation | Faculty of Life and Medical Sciences, Doshisha University |
| 4th Author's Name | Shizuko HIRYU |
| 4th Author's Affiliation | Faculty of Life and Medical Sciences, Doshisha University:Bio-navigation Research Center, Doshisha University |
| 5th Author's Name | Hiroshi RIQUIMAROUX |
| 5th Author's Affiliation | Faculty of Life and Medical Sciences, Doshisha University:Bio-navigation Research Center, Doshisha University |
| 6th Author's Name | Yoshiaki WATANABE |
| 6th Author's Affiliation | Faculty of Life and Medical Sciences, Doshisha University:Bio-navigation Research Center, Doshisha University |
| Date | 2011/1/13 |
| Paper # | US2010-104 |
| Volume (vol) | vol.110 |
| Number (no) | 366 |
| Page | pp.pp.- |
| #Pages | 6 |
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