衛生害虫の天敵としてのクモ類の研究 : 3. オオヒメグモの生態

概要

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A study was made on the distribution and population density of the spider, Theridion tepidariorum, which is well known as one of the natural enemies of pest insects, in various localities in Nagasaki Prefecture in 1966. The number of T. tepidariorum was observed over eight different kinds of environment : forests, paddy field, farms, caves, sewers, houses (urban and suburban) and cattle barns. Their population density was highest at the inside of animal sheds and houses, in which this spider was found abandantly in the barn, kitchen and latrine. The seasonal prevalene in the house and the breeding season in three stations were also surveyed throughout a year. The peak of the population density in the house was observed in June and July. Many egg-sacs were layed in the warm season from May to August with a marked peak in June and a few in the rest seasons. The mean frequency of oviposition per female in a whole life was 3.08 and the mean number of eggs per egg-sac was 347.1. The preys of this species were insect species belonging to the orders Blattaria, Dermaptera, Isoptera, Hemiptera, Mecoptera, Lepidoptera, Coleoptera, Hymenoptera and Diptera, Among them, many of the flies, chironomids (Diptera) and Blattaria were trapped by the web more frequently than any other insects.
日本衛生動物学会の論文
1975-05-15