The History of Techniques concemed with Artificial Reef and their Future

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  • 魚礁関連技術発達の経過と今後の方向
  • ギョショウ カンレン ギジュツ ハッタツ ノ ケイカ ト コンゴ ノ ホウコウ

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Abstract

Since prehistoric time, fishing gears have been used to catch fishes directly and auxiliary gears like shelters have been also used to gather fishes around them. In addition, there are some fishing gears like setnets or traps, which work as aggregating devices. The artificial stone bed located in the coast of Kochi prefecture, which is supposed to be built in the middle of 17th century, is a device to gather fishes and to catch them easily. The artificial stone bed located in the coast of Aomori prefecture, which is supposed to be built in the middle of 18th century is for the increase of tangle. They have been developed in different districts and their objects, i.e., fishes or tangle, are different from each other. But their purposes, i.e., making use of the function to gather objective creatures, are the same with each other. To develop these kind of techniques, it is important that ecological knowledge of objective creatures, especially their ethological knowledge against things Iocated in the water. In close cooperation with the resources management and environmental conservation projects, these techniques will keep or increase marine resources and lead to stable fishery.

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