Observation on the entrance and exit of house flies in a residence

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  • Ogata Kazuki
    Department of Medical Entomology, National Institute of Health, Tokyo

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Other Title
  • ある民家で観察したイエバエ成虫の出入りについて
  • アル ミンカ デ カンサツ シタ イエバエ セイチュウ ノ デイリ ニ ツイテ

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Description

The entrance and exit of the house flies in a residence of Yokohama city, Japan, was observed by the mark and release method. The house flies resting on the ceiling of this residence at night were collected and were used for the experiment. It seems that all the house flies in the house were caught by this method. The flies marked on the scutum with the colour paints, white, yellow and blue, were released over three days. After the release, the remaining marked flies and the newly invaded ones were counted on the ceiling at nights on succeeding days. As shown in Table 2, the released flies remained the period of four to seven days, and they showed the decrease of 30〜72% of the numbers of the previous night. It was observed that some flies once disappeared appeared again the next night.

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