Affiliation: | (1) Okinawa Prefectural Agricultural Experiment Station, 903 Naha, Japan;(2) School of Forestry and Environmental Studies, Duke University, 27706 Durham, N.C., USA;(3) Institute of Animal Resource Ecology, The University of British Columbia, V6T 1W5 Vancouver, Canada;(4) Present address: Department of Biology, Faculty of Science, Kyushu University, 812 Fukuoka, Japan |