Abai, MR

6th International Congress of DipterologyKey Words: methyl eugenol, male annihilation technique, fruit-flyexclusion program, exotic insect pest, invasion∗∗∗∗∗∗∗∗∗∗Drosophilid Fauna in Kume-jima, a Subtropical Island ofJapanKondo, M. (1) & M. T. Kimura (2)(1) Biosystematics Laboratory, Graduate School of Social and Cultural Studies, KyushuUniversity, Ropponmatsu, Fukuoka 814-8567, Japan(2) Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, JapanThe Ryukyu archipelago is continental islands located in subtropicalregion of Asia, and its fauna and flora appear to consist of complexcombinations of tropical, subtropical and temperate elements. We arestudying the drosophilid fauna of the archipelago in regard to the climates,size of islands and distance from the continent and other islands. In thisarchipelago, intensive surveys (Hirai et al. 2000) have been performed ondrosophilid fauna in Iriomote-jima, the southwestern island of thearchipelago, where about 65% of drosophilids were tropical andsubtropical species and about 30% temperate. However, only a fragmentalsurvey was conducted in other islands.We study the drosophilid fauna in Kume-jima, an island located in thecentral part of the archipelago. Collections were made by traps baited withbananas and mushrooms by net sweeping on undergrowth plants and fromnaturally-occurring fungi and tree trunks from April 2002 to February 2003.As a result, a total of 37 species representing 16 genera were collected.We compare the present results with the results of surveys in Iriomote-jimaand the main islands of Japan, and discuss the characteristics of drosophilidfauna in this island.138