Abstract
This paper gives ecological studies on cave spiders in Central and Southern Kyushu. The author surveyed the natural environment, spider fauna and seasonal fluctuation of Cicurina sp. in Katano-do Cave (Shibushi-cho, Kagoshima Pref.). As for the diural changes in summer (July 12-13, 1975), the daily temperature fluctuation was constantly 22±0.50°C at 60m inside the cave, and the humidity was constantly about 95% (cf. Fig. 1). Theridion tepidariorum, Theridion ferrumequinum, Coelotes sp., Falciletoneta sp. and Cicurina sp. inhabit in Katano-do Cave. Among them Cicurina sp. is the dominant species in Katano-do Cave and the density of 3 individuals per 0.06 m2 was shown.As for the seasonal flucutuations, females and larvae emerge throughout the year. Subadult males emerge from June to September. Adult males emerge from August to December.
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