Ecological studies on mosquitoes about Kyoto City : (I) On the successions of mosquito larvae breeding in minute inland waters found in gravevards and bamboo groves

Abstract

Observations on the successions of larvae and pupae of mosquitoes breed in the minute inland waters in the graveyards and the bamboo thickets were conducted from January to December, 1953. In the stone basins on the hilly cemetery, 5006 individuals belonging to 7 species were collected, of which Aedes japonicus (67.0%) was the most common, Aedes albopictus (19.5%), Uranotaenia bimaculata (7.3%), Aedes nipponicus (4.9%) were next in frequency, Orthopodomyia anopheloides nipponica (0.9%), Tripteroides bambusa (0.3%), Culex kyotoensis (0.1%) were found only in small numbers. In the bamboo stubs, 3643 individuals belonging to 6 species were obtained, of which Uranotaenia bimaculata (61.1%) was the most common, Aedes flavopictus (22.7%) was next, and Tripteroides bambusa (8.5%), Armigeres subalbatus (3.1%), Aedes japonicus (2.6%), Aedes albopictus (2.0%) were rather rare. The seasonal prevalencies of these species are shown in Fig.1 and Fig.2. In the stone basins in graveyards, Aedes japonicus appeared all the year round, and was dominant in winter and spring, but in summer Aedes albopictus exceeds it, and in November and December it is out-numbered by Uranotaenia bimaculata. The mode of appearance in the bamboo stubs shows that the terms of appearance of Uranotaenia bimaculata and Tripteroides bambusa are the longest of all, and the former is exceedingly dominant in winter and autumn, while in spring and summer Aedes flavopictus takes its place. The writers would regard these larval livings in two types of water area as independent communities, and propose to appellate them "community in the stone basins on the hilly cemetery" and "community in the bamboo stubs on the height" respectively. Basing on these results, the over-wintering habits and the life histories of each species were comparatively considered, and the constructions and the features of each community were discussed.