Extinction process of frood-plain Cyprinid,Hemigrammocypris rasborella
| Project/Area Number |
24650598
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Museology
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| Research Institution | University of Hyogo |
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Principal Investigator |
TANAKA Tetsuo 兵庫県立大学, 自然・環境科学研究所, 准教授 (40244694)
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| Co-Investigator(Renkei-kenkyūsha) |
KADONO Yasuo 神戸大学, 理学研究科生物学専攻, 教授 (90127358)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | カワバタモロコ / 絶滅 / カニバリズム / 絶滅危惧種 / 再導入 / カンニバリズム / ため池 |
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| Research Abstract |
Population size estimation of flood-plain Cyprinid(Hemigrammocypris rasborella),living in 10 different condition of artificial rice-field ponds, was made over 10 years. Drastic population growth rate was observed the first year after new introductions. Next year sudden decrease of population size may be related by cannibalism. But cannibalism never or hardly arise extinction of given pond populations, which may be caused by dry-up of pond water only.The fragmentation of water channel network may be the main mechanism of the species extinction.
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Report
(3 results)
Research Products
(7 results)
