2012 Fiscal Year Final Research Report
Relation of the quality of seawater to the decline of seaweed populations
| Project/Area Number |
22580379
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Boundary agriculture
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| Research Institution | Nagasaki University |
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Principal Investigator |
KUWANO Kazuyoshi 長崎大学, 大学院・水産・環境科学総合研究科, 准教授 (60301363)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 海洋保全 / 海洋資源 / 水産学 / 海藻 |
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| Research Abstract |
The quality of seawater was evaluated by the growth of Eisenia bicyclis cultured in a continuous culture system. When more than 50.4 μM nitrate, more than 2.8 μM phosphate and more than 0.069 μM Fe-EDTA were added in the supply medium, growth inhibition by nutrient deficiency did not occur during the experiment period of 4 weeks. A suspension of fish feed pellet was continuously added to the continuous culture system with the supply medium containing 100 μM nitrate, 2.84 μM phosphate and 0.28 μM Fe-EDTA. The growth of E. bicyclis was conspicuously inhibited even at the lowest concentration of 60 mg per 1 L of the supply medium.
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