Distribution of Mosquitoes on a Hill of Nagasaki City, with Emphasis to the Distance from Human Dwellings

Mosquito larvae were examined by using an ovitrap and adults by human bait catch from May to August in 1989 at 27 sites from the foot to the top of Konpira Hill of Nagasaki City, ranging from 120 to 320m in altitude. Dominant mosquito species of both larvae and adults were Aedes japonicus, Ae. albopictus and Tripteroides bambusa, but remarkable differences were recognized in distribution among species. Ae. albopictus was abundant near the foot of the hill where human dwellings were located, while Ae. japonicus was rather evenly distributed from the foot to the top and Tr. bambusa was abundant near the top. More abundant Ae. albopictus near the foothill is probably due to a marked feeding preference for man