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  • 1 Kobe University Department of Biology, Graduate School of Science Kobe 651-0065 Japan
  • 2 Hokkaido University Research Institute for Electronic Science Sapporo, Hokkaido 060-0812 Japan
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Aggressive behavior of white-eye mutant crickets was investigated and compared with that of wild-type crickets. In the dark, wild-type pairs performed long-lasting fights with significantly higher aggressive levels compared to those in the light. In contrast, fights between two white-eye mutants were not significantly different with those between two wild-type crickets both in duration and the aggressive levels. Ethograms of aggressive behavior showed that the mutants could show typical sequentially escalating fight with the same behavioral categories as the wild-type crickets. These results indicate that the white-eye mutants are able to express normal aggressive behavior.

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