著者

山本 周平 細石 真吾

出版者

日本昆虫学会

雑誌

昆蟲. ニューシリーズ (ISSN:13438794)

巻号頁・発行日

vol.13, no.3, pp.133-135, 2010-09-25

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Alate individuals of a tropical fire ant, Solenopsis geminata, were found by the first author on the ship "Ogasawara-maru", which traveled from Chichi-jima (the Ogasawara Islands) to Tokyo. This harmful species is known to occur in Japan, but records have hitherto been limited to isolated islands such as Iwo-jima (the Ogasawara Islands) and Okinawa-jima (the Ryukyu Islands). Since the liner anchored close to Iwo-jima just before that cruise, when it was possible that individuals of the species flew onboard. The discovery suggests the likelihood that the ant has been unintentionally introduced to Chichi-jima and even to the mainland of Japan.

著者

利光 花菜美 林 大祐 矢野 文士 細石 真吾 徳田 誠

出版者

一般社団法人 日本昆虫学会

雑誌

昆蟲.ニューシリーズ (ISSN:13438794)

巻号頁・発行日

vol.25, no.3, pp.87-94, 2022-09-25 (Released:2022-09-29)

参考文献数

19

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Ants play an important role in forest ecosystems in terms of biomass and various biological interactions, but non-destructive continuous observation of colonies is difficult for species nesting in trees. During the investigations of forest arboreal small mammals using wood nest boxes between January and December 2021, nestings of Camponotus kiusiuensis Santschi were observed at high frequencies in a census site on Mount Kyougatake, Saga Prefecture, Kyushu, Japan. We surveyed the nesting site preference of C. kiusiuensis and conducted monthly observations of colony compositions from spring to winter. Among three types of nest boxes, small (500 cm3), medium (1,000 cm3), and large (2,000 cm3), C. kiusiuensis nested in the large nest boxes at significantly higher frequencies. Although the nest boxes were either set at low (1.5–2.0 m high) or high (3.5–4.0 m high) positions of trees, no significant differences were detected in the nesting sites between them. The number of colonies was the highest in April and it gradually decreased from spring to autumn. In the nest boxes in which colonies of C. kiusiuensis were continuously observed until autumn, the developmental stages of immature individuals inside were almost uniform: larvae were observed from April to June, pupae in July, and many adults including males and new alate queens were found in August and September. No or very few ant individuals were observed in October and November, suggesting that workers moved the larvae to other places in late autumn. Based on our observations, the arboreal nest boxes seem not to be suitable sites for overwintering.