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一般研究成果リスト

Detail of Grant Awarded General Researches

Project

Seasonal distribution of the Endo's pipistrelle, which is listed as vulnerpipistrelle on the Red Data Book 2014 of Ministry of the Environment, in Tama River basin.

General
Research
No.237
Principal
Investigator
Tatsuya Kasahi
Affiliation
(at that time)
Tokyo Bat Research Group
Research
Summary

In Tokyo, Endo's pipistrelle Pipistrellus endoi, which is listed as vulnerable species on the Red Data Book 2014 of Ministry of the Environment, was first recorded in 1997. We did two kinds of survey, because it is inferred that Endo's pipistrelle is moving seasonally by the subsequent study in Tokyo. One method is a capture survey for elucidate their seasonal distribution. We tried to obtain for accurate echolocation calls analysis of the captured individuals. One more method is a seasonally route census by car for grasping the seasonal distribution by echolocation calls analysis. The research area was Okutama Mountains in Tokyo and Tama river source region in Yamanashi prefecture.

Result of survey, we captured 31 individuals (2families, 6species), but We could not capture Endo's pipistrelle. We detected 52 sounds around 40 kHz, and we obtained 41 sample files of echolocation calls by route census survey. Result of sound analysis, of these files, 33 files suggest Endo's pipistrelle's echolocation calls. As a result, it was suggested that in the spring and autumn, it is distributed from high altitude location to the foot of the mountain, but in autumn, frequency of confirmation was low than spring. On the other hand, it was suggested that is distributed almost high-altitude location in summer. In conclusion, it was suggested that Endo's pipistrelle is moving seasonally.


Collaborators

Koo Mineshita, Morio Urano, Akiyoshi Sato, Toshikazu Sugie

Ryota Matsuyama, Yushi Osawa, Keiko Osawa, Etsuko Konishi

Fumiaki Yamazaki, Marina Komatsu, Masahiko Mizuno, Satomi Noguchi

Daiya Maesako, Shingo Ishizaka, Daisuke Sakata, Hitomi Araki

Kaoru Usui


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