1才アコヤガイを用いた施術貝の生残率および真珠品質の向上

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タイトル別名
  • Improved Pearl Quality and Survival Rate of Operated-shells by Using 1-year-old Mother-shells of the Pearl Oyster, <I>Pinctada fucata martensii</I>
  • 1サイ アコヤガイ オ モチイタ シジュツガイ ノ セイザンリツ オヨビ シンジュ ヒンシツ ノ コウジョウ

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抄録

To improve the management of pearl culture, the production efficiency of mother-shells of difference ages was examined in Tsushima Island, Nagasaki Prefecture from June 2004 to January 2006. The survival rate, quality, value of production and price of pearls produced from 1-year-old oysters inserted 6.66 mm nuclei (1-year-old group) were compared with those from 2-years-old oysters inserted 7.27 mm nuclei (2-years-old group 1) and 2-years-old oysters inserted 7.42 mm nuclei (2-years-old group 2). Oysters in the 2-years-old group 2 were from the same group as the 1-year-old group, but nuclei were inserted in June 2005. The survival rate of the 1-year-old group was 32.0% and 12.7% higher than those of the 2-years-old groups 1 and 2, respectively. The nacre thickness and rations of faultlessness and commercially valuable pearls produced from the 1-year-old group were 1.6 times and 2.2 times, 12.3% and 13.7%, 21.9% and 20.0% higher than those from the 2-years-old groups 1 and 2, respectively. The prices of 7 and 8 mm commercial pearls from the 1-year-old group were 1.3-3.4 times higher than those from the 2-years-old groups 1 and 2. The value of commercial pearl produced from the 1-year-old group was 2.6 times and 1.9 times higher than those from the 2-years-old groups 1 and 2, respectively. Above results suggest that using 1-year-old oysters for operation in June can be effective in improving the production efficiency of pearl culture.

収録刊行物

  • 水産増殖

    水産増殖 56 (1), 73-79, 2008

    日本水産増殖学会

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