Navigation strategy of acoustical sensing by bats.
| Project/Area Number |
21760318
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Measurement engineering
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| Research Institution | Doshisha University |
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Principal Investigator |
HIRYU Shizuko 同志社大学, 生命医科学部, 准教授 (70449510)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | コウモリ / 超音波センシング / 生物ソナー / 超音波 |
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| Research Abstract |
We investigated how CF-FM bats adjust pulse direction and beam width according to prey position using 31-ch microphone array system. When the bat started terminal phase at approximately 1 m from the moth, G. pryeri sometime showed distinctive evasive flight. At the same time, the bats broadened the beam width of some emissions in both horizontal and vertical planes. When the moth starts evasive flight, tracking accuracy of echolocation by the bat would decrease compared to that during the approach phase. However, in 97% of emissions during the terminal phase, the beam width of the pulse was wider than the misalignment(target direction-pulse direction) as well as during search and approach phase. These findings indicate the bats actively adjusted their beam width to retain moving target in spatial window of echolocation at final stage of capturing.
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Report
(4 results)
Research Products
(42 results)
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[Presentation] Prey selection strategy by Japanese horseshoe bats during approaching multiple fluttering moths, measured by microphone array system2011
Author(s)
Kinoshita, Y., Matsuta, N., Watanabe, Y., Riquimaroux, H., Ohta, T., Hiryu, S.
Organizer
第16回聴覚研究フォーラム
Place of Presentation
同志社琵琶湖リトリートセンター(滋賀)
Year and Date
2011-12-03
Related Report
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[Presentation] Jamming avoidance behavior by Pipistrellus abramus during paired flight : Parameter comparison to time-frequency structure of FM pulse by using of discriminant analysis2011
Author(s)
Takahashi, E., Kagami, Y., Watanabe, Y., Riquimaroux, H., Ohta, T., Hiryu, S.
Organizer
第16回聴覚研究フォーラム
Place of Presentation
同志社琵琶湖リトリートセンター(滋賀)
Year and Date
2011-12-03
Related Report
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[Presentation] Sonar strategy by FM echolocating bats (Pipistrellus abramus) during target search in the field : Analysis of 3-D flight trajectory and pulse direction measured by a microphone array system2011
Author(s)
Watanabe, S., Fujioka, E., Watanabe, Y., Riquimaroux, H., Ohta, T., Hiryu, S
Organizer
第16回聴覚研究フォーラム
Place of Presentation
同志社琵琶湖リトリートセンター(滋賀)
Year and Date
2011-12-03
Related Report
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[Presentation] FMコウモリは超音波の周波数を変化させて混信を回避する2011
Author(s)
飛龍志津子, Bates, M.E., Simmons, J.A.力丸裕
Organizer
Animal 2011:日本動物心理学会(第71回)・日本動物行動学会(第30回)・応用動物行動学会/日本家畜管理学会(2011年度)合同大会
Place of Presentation
慶應義塾大学(東京)
Year and Date
2011-09-09
Related Report
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[Presentation] Frequency shifts of echolocation pulses in a cluttered environment : Comparison between Pipistrellus abramus and Miniopterus fuliginosus2011
Author(s)
Takenaga, T., Hiryu, S., Simmons, J.A., Riquimaroux, H., Watanabe, Y.
Organizer
The Acoustical Society of America 161th Meeting
Place of Presentation
Sheraton Seattle Hotel (Seattle, USA)
Year and Date
2011-05-25
Related Report
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[Presentation] Characteristics of sonar emissions for effective target search by FM echolocating bats during natural foraging2011
Author(s)
Fujioka, E., Kasai, R., Aihara, I., Hiryu, S., Riquimaroux, H., Watanabe, Y.
Organizer
日本音響学会聴覚研究会
Place of Presentation
同志社大学(京都)
Year and Date
2011-05-13
Related Report
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