Studies of the social evolution of termites using introduction of selfish-genotype individuals into incipient colonies.
| Project/Area Number |
26440230
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Ibaraki University |
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Principal Investigator |
Kitade Osamu 茨城大学, 理学部, 教授 (80302321)
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| Research Collaborator |
YABUKI KENTA
TAKEUCHI TOMOTOSHI
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 社会性 / シロアリ / 遺伝的カスト決定 / 攻撃行動 / 進化 / 利己的個体 / 単為生殖 / コロニー融合 / ソルジャー / 利他性 / 初期コロニー / コロニー間相互作用 / 攻撃 |
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| Outline of Final Research Achievements |
In this study, factors that promoted social evolution of termites were analyzed, using incipient colonies as model of ancestral termite colonies. Investigation of fitness components of parthenogenetic colonies under solitary and competitive environments revealed that individuals of selfish-genotype easily differentiated into supplementary reproductives and fight against original reproductives, which drastically decrease fitness of the colonies. Genetic caste determination system probably works to suppress the production of selfish individuals. Under competitive environments, both colony size increase and presence of soldiers greatly increase the fitness of colonies. Frequency of incipient colony fusion was affected by the relatedness between the reproductives.
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Report
(4 results)
Research Products
(15 results)
