Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata
Seeding is the most important aspect of pearl cultivation, and appropriate nucleus can determine the quality of a pearl : nacre secretion and accumulation around the nucleus. This affects harvest time, nucleus extrusion, survival rate of the pearl oysters and the production cost. In order to provide...
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| Format: | Article |
| Language: | English |
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Prince of Songkla University
2007-07-01
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| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | http://www.sjst.psu.ac.th/journal/29-4_online/0125-3395-29-4-0959-0969.pdf |
| _version_ | 1818016447767511040 |
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| author | Kanjanachatree, K. Piyathamrongrut, K. Inthoncharoen, J. |
| author_facet | Kanjanachatree, K. Piyathamrongrut, K. Inthoncharoen, J. |
| author_sort | Kanjanachatree, K. |
| collection | DOAJ |
| description | Seeding is the most important aspect of pearl cultivation, and appropriate nucleus can determine the quality of a pearl : nacre secretion and accumulation around the nucleus. This affects harvest time, nucleus extrusion, survival rate of the pearl oysters and the production cost. In order to provide nuclei to substitute for those imported from China which are made from freshwater pearl oyster-shells, 3 kinds of the local shells of Pinctada fucata, Pteria penguin and Pinctada maxima were selected for seed production. The obtained nuclei have various diameters depend on the shell width at the hinge region. The average diameters are 5.44, 6.78, 7.54 and 6.10 mm, while their production costs are 5, 7.7, 18.5 and 7.5 baht per 1 nucleus, respectively, for Pinctada fucata, Pteria penguin, Pinctada maxima and freshwater pearl oysters (control group). After nucleus implantation into the gonad of culture pearl oysters, Pinctada fucata, and rearing in the sea, the obtained pearls using nuclei made from the shells of Pinctada fucata and Pinctada maxima (both belong to the same genus as the implanted culture pearl oysters) have as good nacre formation as that from freshwater pearl oysters. In contrast, the pearl production using nuclei made from Pteria penguin-shells have significantly worse nacre formation. Survival rate of the culture oysters seeded with nuclei made from Pinctada fucata-shells is highest at 47%, nucleus extrusion 8% only, and harvest rate 31%; while with Pinctada maxima-shells, these values are 38%, 17.5% and 14%, respectively. So the nuclei made from local Pinctada fucata-shells are appropriate for pearl cultivation and are comparable to imported nuclei. Although the obtained pearls are small, the nuclei made from Pinctada fucata-shells have low cost, low nucleus extrusion and high productivity. |
| first_indexed | 2024-04-14T07:12:28Z |
| format | Article |
| id | doaj.art-482905f55182424b858c3fdc3e13ac07 |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-04-14T07:12:28Z |
| publishDate | 2007-07-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-482905f55182424b858c3fdc3e13ac072022-12-22T02:06:23ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952007-07-01294959969Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucataKanjanachatree, K.Piyathamrongrut, K.Inthoncharoen, J.Seeding is the most important aspect of pearl cultivation, and appropriate nucleus can determine the quality of a pearl : nacre secretion and accumulation around the nucleus. This affects harvest time, nucleus extrusion, survival rate of the pearl oysters and the production cost. In order to provide nuclei to substitute for those imported from China which are made from freshwater pearl oyster-shells, 3 kinds of the local shells of Pinctada fucata, Pteria penguin and Pinctada maxima were selected for seed production. The obtained nuclei have various diameters depend on the shell width at the hinge region. The average diameters are 5.44, 6.78, 7.54 and 6.10 mm, while their production costs are 5, 7.7, 18.5 and 7.5 baht per 1 nucleus, respectively, for Pinctada fucata, Pteria penguin, Pinctada maxima and freshwater pearl oysters (control group). After nucleus implantation into the gonad of culture pearl oysters, Pinctada fucata, and rearing in the sea, the obtained pearls using nuclei made from the shells of Pinctada fucata and Pinctada maxima (both belong to the same genus as the implanted culture pearl oysters) have as good nacre formation as that from freshwater pearl oysters. In contrast, the pearl production using nuclei made from Pteria penguin-shells have significantly worse nacre formation. Survival rate of the culture oysters seeded with nuclei made from Pinctada fucata-shells is highest at 47%, nucleus extrusion 8% only, and harvest rate 31%; while with Pinctada maxima-shells, these values are 38%, 17.5% and 14%, respectively. So the nuclei made from local Pinctada fucata-shells are appropriate for pearl cultivation and are comparable to imported nuclei. Although the obtained pearls are small, the nuclei made from Pinctada fucata-shells have low cost, low nucleus extrusion and high productivity.http://www.sjst.psu.ac.th/journal/29-4_online/0125-3395-29-4-0959-0969.pdfPinctada fucatapearl oysternucleuspearl formationnucleationbead rejection |
| spellingShingle | Kanjanachatree, K. Piyathamrongrut, K. Inthoncharoen, J. Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata Songklanakarin Journal of Science and Technology (SJST) Pinctada fucata pearl oyster nucleus pearl formation nucleation bead rejection |
| title | Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata |
| title_full | Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata |
| title_fullStr | Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata |
| title_full_unstemmed | Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata |
| title_short | Kinds of nucleus for effective pearl cultivation of the pearl oysters, Pinctada fucata |
| title_sort | kinds of nucleus for effective pearl cultivation of the pearl oysters pinctada fucata |
| topic | Pinctada fucata pearl oyster nucleus pearl formation nucleation bead rejection |
| url | http://www.sjst.psu.ac.th/journal/29-4_online/0125-3395-29-4-0959-0969.pdf |
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