| Project/Area Number |
22656117
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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 |
Civil and environmental engineering
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| Research Institution | The University of Kitakyushu |
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Principal Investigator |
KUSUDA Tetsuya 北九州市立大学, 国際環境工学部, 教授 (50037967)
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| Co-Investigator(Kenkyū-buntansha) |
KADOKAMI Kiwao 北九州市立大学, 国際環境工学部, 教授 (60433398)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,590,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2010: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | 環境質定量化・予測 / 環境変動 / 水圏現象 / 土木環境システム / 貝殻 |
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| Research Abstract |
The purpose of this study was to put estimation of aquatic environment such as anoxia in the past in terms of growth line in shells within the bounds of possibility. Estimation of the date that a shell had been living with 14C was impossible in spite of the initial plan because of low accuracy of the measurements of 14C. This result was followed by a new trial on estimation of aquatic environment that a shell lived by using a shell of which the death date was recorded. One problem through this trial is that the outer-shell dissolves in water and seawater so that growth lines in juvenile have usually disappeared. The other problem is that daily growth lines reported in previous research were not found in our study. The shell of short neck crab was found to have two or more growth lines per day. Measured growth line distances seem to have a relationship with sea conditions such as storm therefore availability of growth lines of shells is highly possible. Further research work is to be targeted to elucidate the generation mechanism of growth lines of shells and to confirm the year of death of shells.
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