| Budget Amount *help |
¥23,010,000 (Direct Cost: ¥17,700,000、Indirect Cost: ¥5,310,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2013: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2012: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
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| Outline of Final Research Achievements |
The field and laboratory experiments were performed to clarify the community study on aphidophagous invasive ladybird beetle Harmonia axyridis. From the field studies, H. axyridis at invasive area utilized invasive aphids and H. axyridis was one of common aphidophagous species at rather short period. This may be caused by many vacant niches at aphidophagous predators at the invaded area, with a low biodiversity of aphidophagous communities. From the laboratory experiments on exclusive competition between H. axyridis and sibling H. yedoensis with a surplus food condition, H. axyridis mainly excluded only H. yedoensis whereas H. yedonsis excluded both of H. axyridis and H. yedoensis, suggesting that specialization at H. yedoensis for certain habitats and preys may play one of important role on the coexistence between H. axyridis and H. yedoensis.
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