Functional roles of reproductive mode in persisting population and maintaining genetic diversity of daphnia species.
| Project/Area Number |
25291094
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Tohoku University |
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Principal Investigator |
Urabe Jotaro 東北大学, 生命科学研究科, 教授 (50250163)
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| Co-Investigator(Renkei-kenkyūsha) |
MAKINO WATARU 東北大学, 大学院生命科学研究科, 助教 (90372309)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2013: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Keywords | プランクトン / 遺伝的多様性 / 個体群動態 / ミジンコ / 湖沼 / 休眠卵 / 絶対単為生殖 / 外来種 / 動物プランクトン / 隠蔽個体群 / 温暖化 / 越冬様式 |
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| Outline of Final Research Achievements |
In general, Daphnia reproduce parthenogenetically but switch to sexual reproduction for producing resting eggs that are capable of overwintering. If certain parthenogenetic individuals are competitively superior to others, their success results to reduce genetic diversity. However, it not yet clear how competitive persistence of daphnia populations are related with maintenance of the genetic diversities. This study showed that some of competitively inferior individuals are highly sensitive to environmental changes in initiating production of the resting or sexual eggs By producing these eggs before intensifying the competitive interactions, daphnia species maintained their genetic diversities.
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Report
(4 results)
Research Products
(20 results)
