TEMPORAL CHANGE IN THE HOME RANGE OF THE ANT FORMICA (SERVIFORMICA) JAPONICA MOTSCHULSKY : AN OBSERVATION AND EXPERIMENT IN A GRASSLAND.

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  • HAGIMOTO Mari
    Department of Biology, Faculty of Science, Nara Women's University
  • WADA Keiji
    Department of Biology, Faculty of Science, Nara Women's University

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  • クロヤマアリの行動圏の変動
  • クロヤマアリ ノ コウドウケン ノ ヘンドウ

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Abstract

The temporal changes of home ranges of three individual colonies of the ant Formica (Serviformica) japonica in a grassland were studied with the group-marking method. Individual colonies occupied a certain space as their home ranges. The home ranges were segregated between neighboring colonies, and this segregation pattern was more or less maintained during one day and for a few days, but changed seasonally. When an experimental barrier was established between two neighboring colonies to limit the home range of one colony for two days, the other colony did not expand its home range. When nestmates of one colony ceased to emerge on the ground surface for a few months, the neighboring colonies extended their home ranges toward the space once occupied by the former colony. These facts suggest that the home ranges of individual colonies of F. japonica were not influenced by the changes in the home ranges of neighboring colonies for a short period, but were for a long period.

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