赤坂御用地および常盤松御用邸のショウジョウバエ相

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Drosophilid flies were sampled in the Akasaka Imperial Gardens and the Tokiwamatsu Imperial Villa, using a Malaise Trap operated continuously between 11 October 2002 and 14 October 2003 in Akasaka, and between 26 July 2002 and 19 August 2003 in Tokiwamatsu. These collections in the Akasaka Imperial Gardens were supplemented by some field works using an insect net. A total of 57 drosophilid species were recorded in the Akasaka Imperial Gardens, but surveys carried out in the Tokiwamatsu Imperial Villa recorded 13 drosophilid species. All species collected in the Tokiwamatsu Imperial Villa were collected in the Akasaka Imperial Gardens, too. All drosophilid species collected at both areas were listed. The drosophilid fauna at the Akasaka Imperial Gardens was compared with that of the Imperial Palace grounds, Tokyo (Beppu, 2000). Numbers of drosophilid species belonging to three genera (Amiota, Hirtodrosophila and Drosophila) in the Akasaka is smaller than those in the Imperial Palace grounds. Trap collections baited with fermenting bananas were not made in the survey of the Akasaka Imperial Gardens, and this seemed to be the reason for the absence of many species belonging to the genus Drosophila in Akasaka. Furthermore, sweeping collections for drosophilid flies could not be done so often in Akasaka. The absence of some species belonging to Amiota or Hirtodrosophila in Akasaka seemed to be due to insufficient sweeping collections, because they had been collected by this method. These suggest that the number of drosophilid species found in the Akasaka Imperial Gardens will increase with more extensive trap and sweeping collections for various materials, and the drosophilid representations of the two areas, the Akasaka Imperial Gardens and the Imperial Palace grounds, will be very similar.
2005-03-25

著者

別府桂
信州大学教育学部

赤坂御用地および常盤松御用邸のショウジョウバエ相

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