一般研究詳細
研究課題 | Project |
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多摩川流域(東京都域)におけるハープトラップを導入した森林性コウモリ類相の把握に関する調査研究と音声ライブラリー構築の試み |
一般研究 General Research |
No.224 |
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代表研究者 Principal Investigator |
重昆 達也 Tatsuya Kasahi |
所属(採択当時) Affiliation |
東京コウモリ研究会 代表 Tokyo Bat Research Group |
研究内容要約 Research Summary |
2014年は鳥獣捕獲許可証交付の遅れから、奥多摩町の廃トンネルと青梅市の廃坑各1ヵ所を対象に毎月内部を利用するコウモリ類を調べ、個体数をカウントした。その結果、キクガシラコウモリ、コキクガシラコウモリ、モモジロコウモリおよびコテングコウモリの利用を認めたが、出産・哺育コロニーとしての利用や主たる越冬地としての利用は認められなかった。 In 2014, because of a delay in receiving wildlife permits, a survey of bats and a census of individuals using an abandoned tunnel in Okutama and an abandoned mine in Ome was performed monthly. The result confirmed use by the horseshoe bat, little Japanese horseshoe bat, eastern long-fingered bat, and Ussuri tube-nosed bat but did not confirm use as a birthing and nursing site nor as a wintering site. In 2015, mist nets and harp traps were used 16 times to implement capture and research and once for protection at nine sites in Ome, Akiruno, and Hinohara. The end result was the capture of six horseshoe bats, one little Japanese horseshoe bat, 31 Asian parti-colored bats (of them, 11 for protection), five eastern long-fingered bats, and five Ussuri tube-nosed bats. These were the first such findings recorded in several municipalities. A simple comparison is impossible due to the infrequent captures, but the effectiveness of introducing harp traps for trapping low-flying bats was evident. Bat call samples were obtained from 9 individuals, but the number of samples was insufficient to examine the trend of the Okutama mountain region bats fauna. The Okutama mountains (in Tokyo Metropolis) are reported to have 53 limestone caverns and numerous man-made caves, although the exact number is unknown. In order to consider the protection and conservation of bats in caves in the Okutama mountains, the status of their use of these limestone caverns and man-made caves must be carefully researched. Such study if carried out would be the first to track the dynamics of bats in these caves. Of bats flying in the forest, those captured were banded during the capture and research. If these individuals are re-captured within the Okutama mountains or in some other region, some answers will be provided about their range of movement and longevity. Although the capture frequency was not high, by repeating this research, it will become clear which bats live in which locations in the Okutama mountains, and this is expected to lead to a proper evaluation for protection and conservation. In addition, this time we have attempted to collect a bat call library. We expect that in the future, by collecting enough samples, we will be able to identify which bats are using which areas without the need for capturing. |
共同研究者 Collaborators |
峰下耕 東京コウモリ研究会 MINESHITA Koo・ |
研究全文 Full Text |
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