Acoustic Identification of Eight Species of Bat (Mammalia: Chiroptera) Inhabiting Forests of Southern Hokkaido, Japan : Potential for Conservation Monitoring
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概要
- 論文の詳細を見る
Assessing the impact of forest management on bat communities requires a reliable method for measuring patterns of habitat use by individual species. A measure of activity can be obtained by monitoring echolocation calls, but identification of species is not always straightforward. We assess the feasibility of using analysis of time-expanded echolocation calls to identify free-flying bats in the Tomakomai Experimental Forest of Hokkaido University, Hokkaido, northern Japan. Echolocation calls of eight bat species were recorded in one or more of three conditions: from hand-released individuals, from bats flying in a confined space and from bats emerging from their roost. Sonograms of 171 calls from 8 bat species were analyzed. These calls could be categorized into 3 types according to their structure: FM/CF/FM type (Rhinolophus ferrumequinum), FM types (Murina leucogaster, Murina ussuriensis, Myotis macrodactylus and Myotis ikonnikovi) and FM/QCF types (Eptesicus nilssonii, Vespertilio superans and Nyctalus aviator). Sonograms of the calls of R. ferrumequinum could easily be distinguished from those of all other species by eye. For the remaining calls, seven parameters (measures of frequency, duration and inter-call interval) were examined using discriminant function analysis, and 92% of calls were correctly classified to species. For each species, at least 80% of calls were correctly classified. We conclude that analysis of echolocation calls is a viable method for distinguishing between species of bats in the Tomakomai Experimental Forest, and that this approach could be applied to examine species differences in patterns of habitat-use within the forest.
- 社団法人日本動物学会の論文
- 2004-09-25
著者
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揚妻 直樹
秋田経済法科大学
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HILL David
University of Sussex
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揚妻 直樹
秋田経済法科大学経済学部
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揚妻 直樹
苫小牧地方演習林
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AGETSUMA Naoki
Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
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揚妻 直樹
北海道大学北方生物圏フィールド科学センター苫小牧研究林
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HILL David
School of Life Sciences, University of Sussex
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Hill D
School Of Biological Sciences University Of Sussex
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Hill David
School Of Life Sciences University Of Sussex
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Agetsuma N
Field Science Center For Northern Biosphere Hokkaido University
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Agetsuma N
Hokkaido Univ. Hokkaido Jpn
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Agetsuma Naoki
Tomakomai Experimental Forest Field Science Center For Northern Biosphere Hokkaido University
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Agetsuma Naoki
Tomakomai Experimental Forest Hokkaido University
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Agetsuma Naoki
Akita University Of Economics And Law
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Agetsuma Naoki
Hokkaido University
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Agetsuma Naoki
Primate Research Institute Kyoto University
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Agetsuma Naoki
Hokkaido Univ. Wakayama Jpn
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AGETSUMA NAOKI
Kyoto University
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Agetsuma Naoki
Field Science Center For Northern Biosphere Hokkaido University
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Hill D
School Of Life Sciences University Of Sussex
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Fukui Dai
Tomakomai Experimental Forest, Hokkaido University
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Fukui D
Hokkaido Univ. Hokkaido Jpn
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Fukui Dai
Tomakomai Experimental Forest Hokkaido University
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揚妻 直樹
北海道大学・北方生物圏フィールド科学センター
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AGETSUMA Naoki
Wakayama Experimental Forest, Hokkaido University
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