| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
Biotic and abiotic surveys were conducted in Ohta River estuary, Hiroshima Prefecture, in order to evaluate spatio-temporal fluctuation of effect of nutritional input from the land on fish production. Monthly survey revealed that early life stages of Japanese temperate bass were widely distributed in the estuary. Larval and juvenile Japanese temperate bass dominated the fish fauna of the estuary from late February through late May. The contribution of nutritional input from the land to the estuarine fish production was suggested to be higher in the up-estuary region during spring based on gut contents and stable isotope analyses.
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