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Keywords:

  • biological invasion;
  • dispersal;
  • Formicidae;
  • invasive ant

Abstract

The distribution of the Argentine ant, Linepithema humile, was investigated in 65 cities or towns along the Seto Inland Sea, western Japan in 2003–2005. Our results include all available information of their distribution in Japan until 2005. Argentine ants have invaded Aichi Prefecture (Tahara-shi), Hyogo Prefecture (Kobe-shi), Hiroshima Prefecture (Hiroshima-shi, Fuchu-cho, Hatsukaichi-shi, Ono-cho and Otake-shi), and Yamaguchi Prefecture (Iwakuni-shi and Yanai-shi). The most widespread distribution was found around Hatsukaichi-shi including the westernmost part of Hiroshima-shi and the easternmost of Ono-cho.