| Budget Amount *help |
¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2010: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2009: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2008: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Research Abstract |
To clarify the coexistence mechanism between Japan-origin invasive and aggressive predator Harmonia axyridis and the related species, field and laboratory experiments were performed. From the field survey, H. axyridis was the most common among the aphidophagous predators at many invaded areas. The sibling species H. yedoensis sympatrically coexists with H. axyridis only on a pine tree to specialize at morphological and behavioral traits. The asymmetric mating interference in H. axyridis plays an important role on the limited habitatof H. yedoensis and the large habitat of H. axyridis.
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