Author Affiliations +
Shuhei Hayaishi,1,2,* Fumihito Shibata,1,3 Takeo Kawamichi1,4
11 Laboratory of Animal Sociology, Osaka City University, Sugimoto, Osaka 558-8585, Japan
22 University Education Center, University of the Ryukyus, Nishiharacho, Okinawa 903-0213, Japan
33 Wakayama Shin’ai Women’s Junior College, Sozaka, Wakayama 640-0341, Japan
44 Honmachi, Higashiyama, Kyoto 605-0981, Japan
*To whom correspondence should be addressed. E-mail: shuheihayaishi@yahoo.co.jp