| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
We developed a reproducible physical model that describes the swimming behavior of the floating larvae (numerical larvae) of Spisula sachalinensis. Using the numerical larvae, we analyzed the adaptability and the settling ratio of such larvae under various environments, allowing us to find the type of seabed sediment that is favorable for their settling to the sea bottom.Furthermore, using the stability index for seabed sediment, we formulated the process how the settled young shells are washed out of the sand, moved and spread due to the ocean waves.We used an artificial reef as a model to analyze how the coast conservation facilities affect the settling of floating larvae and the stable growth of young shells, leading us to find that the partially standing waves generated by the existing coast conservation facilities contribute to the improvement of the survival rate.
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