鋼製魚礁を用いたイワガキの浮体式養殖法

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書誌事項

タイトル別名
  • Submerged Suspension Culture System of Iwagaki Oyster <I>Crassostrea nippona</I> Using an Artificial Steel Reef
  • コウセイ ギョショウ オ モチイタ イワガキ ノ フタイシキ ヨウショクホウ

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説明

A new culture system, ‘submerged suspension culture system’, has been devised for iwagaki oyster Crassostrea nippona in the open sea. This system consisted of an artificial steel reef and ropes of 5 m in length with seeds of the oyster, and floating buoy attached at one end of the rope. The culture experiment by the new system was carried out at a 10 m depth in the sea from February 2003 to June 2006. The results obtained from the experiment were summarized as follows.<BR>(1) All the culture facilities were not damaged by typhoons or winter storms during the experiment.<BR>(2) About 60% of the oysters after three-year culture were reached in the harvestable size of more than 200 g in total weight including shell. The condition index (=soft tissue weight/total weight) of them was greater than that of wild oysters in same commercial size.<BR>(3) There were few attached organisms observed on the cultured oysters and the culture facilities, when compared with the hanging culture. As a result, the maintenance work of the system was unnecessary.<BR>The present study suggested that the new culture system was effective and could be used for commercial iwagaki oyster culture in the open sea.

収録刊行物

  • 水産増殖

    水産増殖 56 (2), 203-209, 2008

    日本水産増殖学会

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