| Budget Amount *help |
¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Research Abstract |
Population dynamics of the brackish water bivalves Corbicula japonica and Musculista senhousia were investigated in the Ohashi River, Shimane Prefecture. Monthly samplings were conducted at the selected stations from the upstream (Lake Shinji) to the downstream (Lake Nakaumi). Saline water intruded into the deeper zone of the Ohashi River, which corresponded with distribution and expansion of M. senhousia. Distribution of C. japonicawas expanded towards the downstream at the flood. Density of C. japonica population at the upstream station of the Ohashi River tended to be small in winter and to be large in summer from November 2005 to March 2013.
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