Four mutually incompatible Argentine ant supercolonies in Japan: inferring invasion history of introduced Argentine ants from their social structure
- 278 Downloads
In recent years, highly invasive ant species successively invaded warm regions of Asia. In Japan, the Argentine ant, Linepithema humile, has become established in several coastal regions. This species forms unusual social organizations called supercolonies consisting of numerous mutually non-aggressive nests. We studied the behavioral relationships, similarity of cuticular hydrocarbon profiles (nestmate recognition cue), and genetic relationships among the introduced Argentine ant populations of Japan. The Japanese populations were divided into four behaviorally, chemically, and genetically distinct supercolonies, which may have derived from independent source populations. The result represents the recent trend of increasing invasions of invasive ants to Asia. The discontinuous distribution of one supercolony throughout most of the Japanese range suggests rapid expansion of the supercolony via human-mediated jump dispersal. Meanwhile, localization of the other three supercolonies in Kobe Port provides the first evidence for multiple invasions of distinct supercolonies into a base for international trade.
KeywordsAsia Biological invasion Invasion history Japan Linepithema humile Supercolony
We would like to express our sincere thanks to Yukio Ishikawa and Toshiharu Akino for their enormous help in the chemical analyses, Fuminori Ito for providing an early draft of Okaue et al. (2007), Sugihiko Hoshizaki and Ryo Nakano for thoughtful advice, Hironori Sakamoto and Shun Suzuki for encouragement, and two anonymous referees for valuable comments on the manuscript.
- Lewis PO, Zaykin D (1998) Genetic data analysis software. Computer program for the analysis of allelic data. Version 1.0. http://alleyn.eeb.ucon.edu/gda/
- Okaue M, Yamamoto K, Touyama Y, Kameyama T, Terayama M, Sugiyama T, Murakami K, Ito F (2007) Distribution of the Argentine ant, Linepithema humile, along the Seto Inland Sea, western Japan: result of surveys in 2003–2005. Entomol Sci 10:337–342Google Scholar
- Pedersen JS, Krieger MJB, Vogel V, Giraud T, Keller L (2006) Native supercolonies of unrelated individuals in the invasive Argentine ant. Evol Int J Org Evol 60:782–791Google Scholar
- R Development Core Team (2007) R: a language and environment for statistical computing. R Foundation for Statistical Computing, ViennaGoogle Scholar
- Radchenko A (2005) Monographic revision of the ants (Hymenoptera: Formicidae) of North Korea. Ann Zool 55:127–221Google Scholar
- Raymond M, Rousset F (1995) GENEPOP (version 1.2): a population genetic software for exact test and ecumenicism. J Hered 86:248–249Google Scholar
- Sambrook J, Fritsch EF, Maniatis T (1989) Molecular cloning: a laboratory manual, 2nd edn. Cold Spring Harbor Laboratory Press, WoodburyGoogle Scholar
- Sneath PHA, Sokal RR (1973) Numerical taxonomy. Freeman, San FranciscoGoogle Scholar
- Sunamura E, Nishisue K, Terayama M, Tatsuki S (2007) Invasion of four Argentine ant supercolonies into Kobe Port, Japan: their distributions and effects on indigenous ants (Hymenoptera: Formicidae). Sociobiology 50:659–674Google Scholar
- Wright S (1951) The genetical structure of populations. Ann Eugen 15:323–354Google Scholar