ヒナハグモの社会行動
1977 年 27 巻 Specialnumber 号 p. 213-219
詳細
1977 年 27 巻 Specialnumber 号 p. 213-219
The social behavior of D. foliicola, a common spider in Japan, was investigated. D. foliicola was observed not only on plant leaves, but also in the artificial environments such as window frames and roadside guardrails.
The spiders inhabited bathroom window frames weakly clumped. Similarly, female spiders were nearly clumped in the population on guardrails.
It suggests that a strong gregariousness occurs among the female individuals. However, the males showed uniform distribution. The distances among individuals are quite close to about 1 or 2mm. The web of this species has two components, i.e. (1) an irregular web of hackled band threads for snaring insects and (2) a retreat of thin threads. In conclusion, the abundance of insects trapped by fluorescent light cause each spider population of window frames and of roadside guardrails to make a considerable gregariousness.
