1. Department of Psychology, Graduate School of Letters, Kyoto University, Japan
2. Japan Society for the Promotion of Science, Japan
3. Faculty of Applied Biological Sciences, Gifu University, Japan
4. Hokusho Agricultural High School, Japan
5. Laboratory of Racing Chemistry, Japan
6. Department of Biological Sciences, College of Natural Sciences, Pusan National University, Korea
7. Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
8. Wildlife Research Center, Kyoto University, Japan