A Method of Selecting Parent-shells of the Pearl oyster, <I>Pinctada fucata martensii</I>, for Use as Piece Oysters Based on the a-value of the Pearl Layer
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- Iwanaga Shunsuke
- Nagasaki Prefectural Institute of Fisheries
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- Yamada Eiji
- Nagasaki Prefectural Pearl Cultivator’s Co-operative Association
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- Kawaguchi Takeshi
- Nagasaki Prefectural Pearl Cultivator’s Co-operative Association
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- Hosokawa Hidetsuyo
- Faculty of Agriculture, Kochi University
Bibliographic Information
- Other Title
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- アコヤガイ殻体真珠層のa値を指標としたピース貝生産用親貝の選抜
- アコヤガイ カクタイ シンジュソウ ノ aチ オ シヒョウ ト シタ ピースガイ セイサンヨウ シンガイ ノ センバツ
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Abstract
The a-value in the pearl layer of the pearl oyster Pinctada fucata martensii, which is used as an indicator for selecting parent-shells, was measured by colorimetry method in June, 2004, and selected parent-shells were used in seed production. Seeds were then used in culture experiments at Nagasaki Prefectural Institute of Fisheries from Nov. 2004 to Dec. 2006. The purpose was to establish a method of producing sacrificed pearl oysters for graft (piece oyster) that produce high-quality pearl. The a-values in pearl layers and pearl qualities produced from piece oysters with parents from the plus field a-value [a(+)] group were compared with those from the minus field a-value [a(-)] counterpart. The a-values in pearl layers of seeds produced from the a(+) group were higher than values obtained from those of the a(-) group. Rates of production of pearls with white object color and pink interference color were significantly higher in the a(+) groups than those in the a(-) groups. Commercial values of pearls produced from the a(+) groups were 1.38-1.52 times higher than those of pearls obtained from the a(-) groups. Above results suggest that the a-value in the pearl layer is an effective indicator and selecting parent oysters with plus field during seed production can result in improved pearl quality.
Journal
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- Aquaculture Science
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Aquaculture Science 56 (2), 167-173, 2008
Japanese Society for Aquaculture Science
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Details 詳細情報について
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- CRID
- 1390001204715931392
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- NII Article ID
- 10029843174
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- NII Book ID
- AN00124667
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- ISSN
- 21850194
- 03714217
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- NDL BIB ID
- 9594803
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed