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Grant-in-Aid for Scientific Research -

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Grant-in-Aid for challenging Exploratory Research

Project Year: 2013.04 - 2016.03

Direct: 3,100,000 (YEN) Overheads: 830,000 (YEN) Total: 4,030,000 (YEN)

Grant-in-Aid for Scientific Research(B)

Project Year: 2011.04 - 2015.03

Direct: 15,100,000 (YEN) Overheads: 4,530,000 (YEN) Total: 19,630,000 (YEN)

Study on the mechanism of biological invasion in ants by focusing on the Japanese invader, Pachycondyla chinensis.

Grant-in-Aid for Scientific Research(B)

Project Year: 2011.04 - 2015.03

Investigator(s): TSUJI Mizuki, MATSUURA Kenji, TATSUTA Haruki, KIKUCHI Tomonori

Direct: 15,100,000 (YEN) Overheads: 19,630,000 (YEN) Total: 4,530,000 (YEN)

We aim at comprehensively testing all existing hypotheses of biological invasion in ants by focusing on Brachyponera (Pachycondyla)chinensis that has been invaded from East Asia to North America. Our polulation genetic, chemical and behavioral study revealed that their population and social structure was polygyny-polydomy and multicolonial that was qualitatively the same between the introduced (USA) and the native (Japan) ranges. However, in the USA their density was higher than in Japan. The stable isotope analysis suggested a shift in the trophic level or food niche, i.e. this ant is a specialist hunter of termites in Japan but has become a generalist predator in the USA. The pupal mortality presumably correlated to the infection lord was higher in Japan. Those results suggest that as the mechanism of biological invasion of this ant the ecological release is more important than social insect-specific mechanisms such as genetic bottleneck.

Grant-in-Aid for Scientific Research(A)

Project Year: 2009.04 - 2012.10

Direct: 9,100,000 (YEN) Overheads: 2,730,000 (YEN) Total: 11,830,000 (YEN)

Grant-in-Aid for Scientific Research on Priority Areas

Project Year: 2009 - 2009

Direct: 5,300,000 (YEN) Total: 5,300,000 (YEN)

Grant-in-Aid for Scientific Research on Priority Areas

Project Year: 2008 - 2009

Direct: 5,600,000 (YEN) Total: 5,600,000 (YEN)

Grant-in-Aid for Scientific Research(B)

Project Year: 2008 - 2008

Direct: 4,000,000 (YEN) Overheads: 1,200,000 (YEN) Total: 5,200,000 (YEN)

Grant-in-Aid for Scientific Research(B)

Project Year: 2007 - 2008

Direct: 4,500,000 (YEN) Overheads: 1,350,000 (YEN) Total: 5,850,000 (YEN)

Grant-in-Aid for Scientific Research(B)

Project Year: 2006 - 2008

Direct: 6,500,000 (YEN) Total: 6,500,000 (YEN)

Grant-in-Aid for Scientific Research on Priority Areas

Project Year: 2006 - 2007

Total: 5,500,000 (YEN)

Grant-in-Aid for Scientific Research(C)

Project Year: 2001.04 - 2003.03

Direct: 3,500,000 (YEN) Overheads: 1,050,000 (YEN) Total: 4,550,000 (YEN)

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Grant-in-Aid for Scientific Research -