| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2010: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2009: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2008: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Research Abstract |
Population dynamics of three-species experimental systems with two hosts(bruchine seed beetles) and the parasitic wasp was analyzed based on learning and memory of insects. Two-species systems without the wasp showed Callosobruchus chinensis went to extinction with competitively dominant C. maculatus. However, three-species systems with the wasp which shows frequency-dependent predation based on learning and memory persisted, showing lasting anti-phase population oscillations of two host species. Choice behaviors in prey and predator may affect biodiversity maintenance through adaptive rapid strategy and population dynamics in nature.
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