Many invasive ants, including the Argentine ant Linepithema humile, form expansive supercolonies, within which intraspecific aggression is absent. The behavioral relationships among introduced Argentine ant populations at within-country or within-continent scales have been studied previously, but the behavioral relationships among intercontinental populations have not been examined. The present study investigated the levels of aggression among intercontinental Argentine ant populations by transporting live ants from Europe and California to Japan and conducting aggression tests against Japanese populations. Workers from the dominant supercolonies of Europe and California did not show aggressive behavior toward workers from the dominant supercolony of Japan, whereas they fought vigorously against workers from minor supercolonies. The three massive supercolonies, together with Argentine ants from Macaronesia, may be the largest non-aggressive unit formed by a social insect species in which intraspecific aggression exists. Absence or low levels of aggression at transcontinental scale, which may have derived from low genetic variation, may help introduced Argentine ants maintain expansive supercolonies. The lack of aggression implies possible frequent exchanges of individuals among the intercontinental populations mediated by human activities.
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Bhatkar A. and Whitcomb W.H. 1970. Artificial diet for rearing various species of ants. Florida Entomol. 53: 229–232
Björkman-Chiswell B.T., van Wilgenburg E., Thomas M.L., Swearer S.E. and Elgar M.A. 2008. Absence of aggression but not nestmate recognition in an Australian population of the Argentine ant Linepithema humile. Insect. Soc. 55: 207–212
Buczkowski G., Kumar R., Suib S.L. and Silverman J. 2005. Diet-related modification of cuticular hydrocarbon profiles of the Argentine ant, Linepithema humile, diminishes intercolony aggression. J. Chem. Ecol. 31: 829–843
de Biseau J-C., Passera L., Daloze D. and Aron S. 2004. Ovarian activity correlates with extreme changes in cuticular hydrocarbon profile in the highly polygynous ant, Linepithema humile. J. Insect Physiol. 50: 585–593
Giraud T., Pedersen J.S. and Keller L. 2002. Evolution of supercolonies: the Argentine ants of southern Europe. Proc. Natl. Acad. Sci. 99: 6075–6079
Heller N.E. 2004. Colony structure in introduced and native populations of the invasive Argentine ant, Linepithema humile. Insect. Soc. 51: 378–386
Holway D.A., Lach L., Suarez A.V., Tsutsui N.D. and Case T.J. 2002. Causes and consequences of ant invasions. Annu. Rev. Ecol. Syst. 33: 181–233
Liang D. and Silverman J. 2000. “You are what you eat”: diet modifies cuticular hydrocarbons and nestmate recognition in the Argentine ant, Linepithema humile. Naturwissenschaften 87: 412–416
Liang D., Blomquist G.J. and Silverman J. 2001. Hydrocarbon-released nestmate aggression in the Argentine ant, Linepithema humile, following encounters with insect prey. Comp. Biochem. Physiol. Part B 129: 871–882
Pedersen J.S., Krieger M.J.B., Vogel V., Giraud T. and Keller L. 2006. Native supercolonies of unrelated individuals in the invasive Argentine ant. Evolution 60: 782–791
Suarez A.V., Holway D.A. and Case T.J. 2001. Patterns of spread in biological invasions dominated by long-distance jump dispersal: insights from Argentine ants. Proc. Natl. Acad. Sci. 98: 1095–1100
Sunamura E., Nishisue K., Terayama M. and Tatsuki S. 2007. Invasion of four Argentine ant supercolonies into Kobe Port, Japan: their distributions and effects on indigenous ants (Hymenoptera: Formicidae). Sociobiology 50: 659–674
Sunamura E., Hatsumi S., Karino S., Nishisue K., Terayama M., Kitade O. and Tatsuki S. (2009). Four mutually incompatible Argentine ant supercolonies in Japan: inferring invasion history of introduced Argentine ants from their social structure. Biol. Invasions: in press (doi: 10.1007/s10530-008-9419-7)
Tsutsui N.D., Suarez A.V., Holway D.A. and Case T.J. 2000. Reduced genetic variation and the success of an invasive species. Proc. Natl. Acad. Sci. 97: 5948–5953
Tsutsui N.D., Suarez A.V., Holway D.A. and Case T.J. 2001. Relationships among native and introduced populations of the Argentine ant (Linepithema humile) and the source of introduced populations. Mol. Ecol. 10: 2151–2161
Tsutsui N.D., Suarez A.V. and Grosberg R.K. 2003. Genetic diversity, asymmetrical aggression, and recognition in a widespread invasive species. Proc. Natl. Acad. Sci. 100: 1078–1083
Wetterer J.K. and Wetterer A.L. 2006. A disjunct Argentine ant metacolony in Macaronesia and southwestern Europe. Biol. Invasions 8: 1123–1129
We would like to thank N. Tsutsui, E. van Wilgenburg, and A. Smith for graciously providing Argentine ants from California, P. Lester, Y. Tsuneoka and two anonymous referees for helpful comments on the manuscript, J. Wetterer and A. Suarez for kind support. This work was supported by a grant from MEC-FEDER (CGL2007-64080-CO2-01/BOS) to XE, and Grant-in-Aid for JSPS Fellows (20·6386) to ES.
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Sunamura, E., Espadaler, X., Sakamoto, H. et al. Intercontinental union of Argentine ants: behavioral relationships among introduced populations in Europe, North America, and Asia. Insect. Soc. 56, 143–147 (2009). https://doi.org/10.1007/s00040-009-0001-9
- Biological invasions
- Intraspecific aggression
- Invasion history
- Linepithema humile