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| Ky, Chin-long; Demmer, Jonathan; Blay, Carole; Lo, Cedrik. |
| Pinctada margaritifera is an economically important marine bivalve species for cultured pearl production in French Polynesian aquaculture. In order to evaluate the influence of donor oyster age on pearl quality traits, experiments were conducted over 6 years using both grafts and surgreffe operations. At harvest, 6 pearl quality traits were recorded and compared: surface defects, luster, grade, darkness level, and visual color. Analyzing the quality traits of pearls harvested in the initial graft process and those of pearls obtained from surgreffe experiments allowed a comparison of the influence of pearl sac cells originating from the initial mantle graft, which aged together with their recipient oysters. The results demonstrated a significant decrease... |
| Tipo: Text |
Palavras-chave: Pearl oyster age; Pinctada margaritifera; Surgreffe; Pearl grade; Pearl colour. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00283/39472/37953.pdf |
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| Ky, Chin-long; Sham Koua, Manaarii; Le Moullac, Gilles. |
| Beaded cultured pearl farming is a lengthy aquaculture process, particularly when the pearl oysters are produced through a hatchery propagation system, and includes the key steps of artificial breeding, larval and spat rearing before graft operations can take place. Within its genus, Pinctada margaritifera has the ability to produce the widest range of pearl colours, thanks to the donor colour polymorphism of the inner shell, which is mainly responsible for colour transmission. As hatchery spat production in P. margaritifera leads to several colour phenotypes (at 3 months old), the aim of this study was to determine whether a relation exists between the colour of the donors as spat and the final pearl colour. In the experiment, which took place over a... |
| Tipo: Text |
Palavras-chave: Pinctada margaritifera; Phenotypes; Spat shell colour; Earlier selection; Pearl colour. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00418/52969/53895.pdf |
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| Ky, Chin-long; Blay, Carole; Sham-koua, Manaarii; Lo, Cédrik; Cabral, Philippe. |
| The top aquaculture species in French Polynesia is Pinctada margaritifera, a mollusc grown for the production of a unique gem: the black pearl. One of the challenges facing the pearl farming industry is to "produce less but better pearls" through genetic improvement. An experimental hatchery system was used to generate full-sib families to be tested for their potential as donor "oysters". A large-scale grafting experiments was done and seven cultured pearl quality traits: grade, surface defects, lustre, darkness level, visual colour categories, circles and shape categories were recorded. Our results revealed, for the first time, significant phenotypic relationships between these quality traits. The grade A cultured pearl class had the largest proportion of... |
| Tipo: Text |
Palavras-chave: Pearl "oyster"; Pinctada margaritifera; Donor "oyster"; Cultured pearl quality; Pearl grade; Pearl colour; Pearl shape; Selective breeding. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00190/30130/28592.pdf |
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| Ky, Chin-long; Le Pabic, Lore; Koua, Manaarii Sham; Molinari, Nicolas; Nakasai, Seiji; Devaux, Dominique. |
| The black-lipped pearl oyster, Pinctada margaritifera is the most important farmed mollusc species in French Polynesia. Donor oyster selection among wild P. margaritifera individuals, chosen according to their inner shell colour, makes it possible to obtain the broadest range of cultured pearl colours of any species. This study demonstrates the relative influence of using black [B] or red [R] outer shell phenotypes, combined with green [G] or yellow [Y] inner shell phenotypes, on pearl darkness level, colour categories and lustre. A large scale grafting experiment was designed and carried out over five grow-out locations, covering three archipelagos: Tuamotus, Society and Gambier. Results revealed that the [B + G] phenotypes may be used as donors to... |
| Tipo: Text |
Palavras-chave: Pearl oyster; Pinctada margaritifera; Shell colour phenotype; Pearl colour; Environment. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00285/39637/38129.pdf |
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