THE MECHANISM OF DECREASE IN SHORT-NECKED CLAM RESOURCES IN THE SHIGETOMI-HIGATA TIDAL FLATS
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- KOHASHI Naoko
- Kagoshima University
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- ADACHI Takahiro
- Kagoshima University
Bibliographic Information
- Other Title
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- 鹿児島湾・重富干潟におけるアサリ資源量の減少要因の検討
- カゴシマワン ・ ジュウ フ ヒガタ ニ オケル アサリ シゲンリョウ ノ ゲンショウ ヨウイン ノ ケントウ
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Abstract
The Shigetomi-higata tidal flats are located in the north-west part at the northern region of Kagoshima Bay. The short-necked clam resources were rich in the tidal flats until the 90's, but the harvests are nowadays decreasing and it has been prohibited to gather the wild short-necked calms. Some filed observations and numerical simulations were conducted to make clear the reasons of decreasing the resources.<br> As a result, the following findings were obtained; 1) the low-concentration chlorophyll a water in the tidal zone has a possibility to retard the clams growth, 2) the chlorophyll a is controlled mainly by the active water exchange between the tidal flats and the outer sea.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71 (2), I_1345-I_1350, 2015
Japan Society of Civil Engineers
