2010 Fiscal Year Final Research Report
Adaptive reproduction strategy and population dynamics through learning and memory of the parasitic wasp and bruchine beetles
| Project/Area Number |
20370008
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SHIMADA Masakazu 東京大学, 大学院・総合文化研究科, 教授 (40178950)
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| Co-Investigator(Renkei-kenkyūsha) |
SHIBAO Harunob 東京大学, 大学院・総合文化研究科, 助教 (90401207)
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| Research Collaborator |
ISHI Yumiko 国立環境研究所, 生物・生態系環境研究センター, 特別研究員
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| Project Period (FY) |
2008 – 2010
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| Keywords | 個体群動態 / 3者宿主-寄生蜂実験系 / 学習 / 記憶 / アズキゾウムシ / ヨツモンマメゾウムシ / ゾウムシコガネコバチ / 生物種の多様性維持 |
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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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