Culture site dependence on pearl size realization in Pinctada margaritifera in relation to recipient oyster growth and mantle graft biomineralization gene expression using the same donor phenotype

Type Article
Date 2016-12
Language English
Author(s) Le Pabic Lore1, Parrad Sophie1, Sham Koua Manaarii1, Nakasai Seiji2, Saulnier Denis1, Devaux Dominique2, 3, Ky Chin-Long1
Affiliation(s) 1 : IFREMER, UMR 241, EIO, Labex Corail,Ctr Pacifique, BP 7004, Taravao 98719, Tahiti, Fr Polynesia.
2 : SCA Regahiga Pearls, BP 48, Rikitea 98755, Gambier, Fr Polynesia.
3 : Grp Interet Econ Poe O Rikitea, BP 176, Rikitea 98755, Gambier, Fr Polynesia.
Source Estuarine Coastal And Shelf Science (0272-7714) (Academic Press Ltd- Elsevier Science Ltd), 2016-12 , Vol. 182 , N. Part.B , P. 294-303
DOI 10.1016/j.ecss.2016.03.009
WOS© Times Cited 14
Note SI:Sustainable pearl-culture
Keyword(s) Pinctada margaritifera, Cultured pearl size, Donor oysters, Recipient oysters, Gene expression, Environmental influences
Abstract Size is the most important and valuable quality of the cultured black-lip pearl, Pinctada margaritifera. As this pearl aquaculture is carried out at numerous grow-out sites, this study analyzes the environmental influence on pearl size parameters (nacre weight and thickness) in relation to the recipient oyster biometric parameters (shell thickness, height, width, and oyster weight) at harvest time. Toward this end, an experimental graft was designed by using a homogeneous donor oyster phenotype. The recipient oysters were randomly and equally transferred and reared in five commercial and contrasting grow-out locations. Overall inter-site comparisons revealed that the cultured pearl size (N=2168) and the biometric parameters of the recipient oysters were highest for sites with warmer temperatures with low seasonal variation in comparison to the southern latitude sites. These results were supported by positive correlations between pearl nacre thickness and recipient oyster shell thickness, height, and width. In parallel, the biomineralization potential of the mantle graft was screened through four genes encoding aragonite (Pif 177, MSI60) and calcite (shematrin 9, aspein). As the gene expression levels were the same among all the donor oysters, this finding demonstrates that: 1) the pearl sac that originated from the mantle graft was not isolated from environmental variations during the culture period and 2) the phenotypic expressions of the two biomineralizing tissues in the recipient oyster were consistent (shell and pearl). In the near future, this knowledge will be helpful at the production sites of genetically selected donor oyster lines for growth produced in hatchery systems.
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Le Pabic Lore, Parrad Sophie, Sham Koua Manaarii, Nakasai Seiji, Saulnier Denis, Devaux Dominique, Ky Chin-Long (2016). Culture site dependence on pearl size realization in Pinctada margaritifera in relation to recipient oyster growth and mantle graft biomineralization gene expression using the same donor phenotype. Estuarine Coastal And Shelf Science, 182(Part.B), 294-303. Publisher's official version : https://doi.org/10.1016/j.ecss.2016.03.009 , Open Access version : https://archimer.ifremer.fr/doc/00321/43191/