インターネットを活用したヤマネ<i>Glirulus japonicus</i>の全国分布調査  [in Japanese] A survey of the nationwide distribution of the Japanese dormouse <i>Glirulus japonicus</i> via Web-based search engines  [in Japanese]

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Author(s)

    • 杉山 昌典 Sugiyama Masanori
    • 筑波大学農林技術センター八ヶ岳演習林 Yatsugatake Forest, Institute of Agricultural and Forestry Research Center, University of Tsukuba
    • 門脇 正史 Kadowaki* Seishi
    • 筑波大学農林技術センター八ヶ岳演習林 Yatsugatake Forest, Institute of Agricultural and Forestry Research Center, University of Tsukuba

Abstract

ヤマネ<i>Glirulus japonicus</i>は本州,四国,九州,隠岐島後に生息するが,これまでに実施された全国分布調査は少ない.ヤマネの生息情報は近年ウェブ上で多く見られるようになったので,検索エンジンでその生息情報を収集し生息分布図を作成した.ヤマネの生息情報件数は年々増加の傾向にあり,その多くは中部地方に集中した.次いで関東・東北地方であり,一方,中国・四国並びに九州・近畿地方は少なかった.この地域間の差異は,森林面積の割合より高標高地の面積の割合に大きく関係していると考えられた.1年を通じてヤマネの生息情報が得られたが,生息情報件数は夏期に多く冬期は少なかった.正確にヤマネと同定可能な多くの情報が得られるため,インターネットを活用したヤマネの生息分布情報の調査は有効だと考えられる.

The Japanese dormouse (<i>Glirulus japonicus</i>) inhabits Honshu, Shikoku, Kyushu and Dogo Island of the Oki Islands, but studies on its distribution in the whole of Japan are few. In this study, we looked for evidence of the presence of the dormouse throughout Japan by using several Web-based search engines, and then made a nationwide distribution map of Japanese dormice. Web content about dormouse observations tended to increase year by year, with most information collected from Chubu, followed by Kanto and Tohoku. On the other hand, little information was obtained from Chugoku, Shikoku, Kyushu and Kinki. The difference in abundance of dormouse Web content across districts seemed to relate to the proportion of high elevation area (over 1,000 m) in each district rather than that of forest area. Although Web content on observed dormice was obtained all the year round, in summer more information on dormice was seen whereas in winter less information was seen. We conclude that Web-based searches for dormouse observations may be an effective means of quantifying its distribution.

Journal

  • Honyurui Kagaku (Mammalian Science)

    Honyurui Kagaku (Mammalian Science) 54(2), 269-277, 2014

    The Mammal Society of Japan

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