Countermeasure against "Cochlo" red tide
When a red tide of "Cochlo" is worried to approach to aquaculture cages, some of the following countermeasures are taken.
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In order to prevent swimming up to red tide layer, feed supply is suspended. |
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In order to avoid meeting fish with red tide water, fish cages are submerged
to near the bottom. |
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In order to avoid entering of red tide water, fish cages are transferred to non red tide area. |
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In order to break red tide cells and make flocculant with broken cells
to facilitate sinking down to bottom of sediment, clay such as montmorillonite
is sprinkled with water to red tide area. |
The following photographs and movie show the manner of sprinkling of clay. Since clay has ability to condense and absorb red tide organisms, red tide is exterminated.
 Shifting yellow clay to the disperser in Korea |
 Sprinkler in Korea |
 Spraying the yellow clay by the sprinkler in Korea |
 Yellow clay sprayed around fish cages in Korea |
 Spraying the clay by spraying pump (Picture is Provided by Tottori Prefectual Fisheries Research Center, Japan) |
 Spraying the clay by spraying pump (Picture is Provided by Tottori Prefectual Fisheries Research Center, Japan) |
