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Acomprehensive study on invasive aliea species and supercolonies of ants

入侵蚂蚁物种和蚂蚁超级群落的综合研究

基本信息

批准号：
17207003
负责人：
HIGASHI Seigo
金额：
$ 32.78万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17207003/
关键词：
supercolony Formica yessensis kin recognition hydrocarbon invasive alien ants Argentine ant fire ant 真社会性マイクロサテライトDNA 個体判別触覚感覚子

项目摘要

In this research on Formica yessensis which exhibits a supercolony on the coast of Ishikari, Hokkaido, We confirmed the presence of a chemosensory sensillum which was previously discovered in workers of a phylogenetically close ant Camponotus japonica. Whereas the sensillum responded even to hydrocarbons of nestmates, the response was less intense than that to hydrocarbons of workers from other colonies, indicating that this organ of F. yessensis retains the function of nestmate recognition. Within the supercolony, the response of the sensillum was significantly correlated with the geographic distance of the analyzed nests, suggesting that there is a little antagonistic relationship even between the nests which do not show any aggressive behaviors. The presence of the antagonistic relationship between the supercolonial nests was also suggested by a mathematical analysis of the behavioral data which was obtained in the outdoor observation of F. yessensis workers. Moreover, the analysis of microsatellite DNA demonstrated that the kin relatedness within the supercolony was as low as that between different colonies. Although the intranidal kin relatedness was a little higher, the standard deviation was high, indicating that the nestmates were composed not only of kins but also of non-related workers and queens. These results suggest that the kin selection is not an important factor to maintain the supercolony. Probably, one of more important factors is the strong wind which often blows flying alates to the sea and accordingly offers advantages to the post-mating queens which abandon the flight and enter the natal or neighboring nests. The relatively homogeneous habitat on seaside dune may be another key factor which facilitated the development of polygyny and the reduction of internidal antagonism on the Ishikari Coast.

本研究以日本北海道石狩市的一个大型蚁群为研究对象，证实了日本弓背蚁（Camponotus japonica）工蚁体内存在化学感受器。而感器甚至对巢友的碳氢化合物也有反应，但反应不如对其他群体工蜂的碳氢化合物的反应强烈，这表明F. yessensis保留了巢伙伴识别的功能。在超群体中，感器的反应与分析的巢的地理距离显著相关，这表明即使在没有表现出任何攻击行为的巢之间也存在一点拮抗关系。通过对野外观察所得的行为数据进行数学分析，也表明了超群体巢间的对抗关系。耶西工人。微卫星DNA分析表明，超群体内的亲缘关系与群体间的亲缘关系一样低。虽然巢内亲缘关系稍高，但标准差也很高，表明巢内成员不仅包括亲缘关系较近的工蜂，还包括非亲缘关系较近的蜂后。这些结果表明，亲缘选择不是维持超集落的重要因素。也许，更重要的因素之一是强风，它经常把飞行的翅虫吹到海里，从而为交配后放弃飞行并进入纳塔尔巢或邻近巢的蜂王提供了优势。海滨沙丘上相对均匀的生境可能是石狩海岸一夫多妻制发展和内体对抗减少的另一个关键因素。