FRUIT FLIES OF THE GENUS DACUS (DIPTERA : TEPHRITIDAE) ON THE KRAKATAU ISLANDS IN INDONESIA, WITH SPECIAL REFERENCE TO AN OUTBREAK OF DACUS ALBISTRIGATUS DE MEIJERE

Abstract

The Krakatau Islands, which are situated in the Sunda Strait between Java and Sumatra in Indonesia, were totally sterilized in 1883 by the world-famous big eruption. In association with the international research program on "100 years development of Krakatau and its surroundings" organized by the Indonesian Institute of Sciences (LIPI), the present author had an opportunity to investigate the insect fauna on the islands in October and November 1982. The fruit fly fauna on the Krakataus was characterized by the scantiness in the number of species together with the presence of an extremely dominant species, Dacus albistrigatus. The situation is discussed in the light of the MACARTHUR and WILSON'S theory of island biogeography.