Author Institution: Department of Biological Sciences, Bowling Green State UniversityAdult longevity of Drosophila is dependent upon many factors. In this study the differences in longevity caused by species, strain, sex, and mating status were examined for 68 species (89 strains) belonging to the D. obscura, melanogaster, and willistoni species groups. Both inter- and intra-specific differences in adult longevity were observed. In most species studied, females lived longer than males. In general, the longevity of unmated females exceeded that of mated ones, while the longevity of mated males was greater than that of unmated ones
