Consulta: subjectFacets:"Pearl shapes"
Registros recuperados: 2
Data/hora: 06/06/2024 06:14:16

Development of cultured pearl circles and shape after initial graft and second nucleus insertion in the black-lipped pearl oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Ky, Chin-long; Demmer, Jonathan; Sham-koua, Manaarii; Cabral, Philippe.
Production of larger, rounder, high-quality cultured pearls with fewer circles is one of the main challenges of Pinctada margaritifera aquaculture faced by every pearl farm in French Polynesia. Although bigger pearl sizes can be achieved through surgreffe operations (implantation of a second nucleus following pearl harvest), control of the development of pearl circles and shapes still remains unclear, as illustrated by grafter’s empirical rules, where often the surgreffe process is only performed after production of uncircled and round pearl shapes. The present study was designed with a real pearl by pearl traceability to reveal for the first time the development of circles and shapes from graft and surgreffe, in relation to the size of the pearl sac. This...
Tipo: Text
Palavras-chave: Pearl oyster; Pinctada margaritifera; Surgreffe; Circled pearls; Pearl shapes; Pearl sac.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00276/38690/37187.pdf

Influence of grafter skill and season on cultured pearl shape, circles and rejects in Pinctada margaritifera aquaculture in Mangareva lagoon
Provedor de dados: 5
Autores: Ky, Chin-long; Nakasai, Seiji; Molinari, Nicolas; Devaux, Dominique.
Cultured pearls quality produced by the mollusc Pinctada margaritifera var. cumingi is determined by a panel of criteria, of which shape is one of the most relevant. Cultured pearls with round and semi-round (RS) shapes are the most valuable. Decreasing the proportion of other pearl shapes (OT: baroque, button, drop, oval), and especially the circled pearls (CL) and rejects (rebuts: RT), is an important challenge for the pearl industry. The present study examined the effect of grafter skill and season of graft on the variation in proportions of CL, RS, OT and RT cultured pearl shape categories in a mono-site culture (Mangareva island lagoon). Six large-scale grafting experiments, carried out in the same way as commercial grafting sessions, were made by...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Cultured pearl; Grafter skill; Pearl shapes; Circled pearls; Grafting season.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00216/32745/31150.pdf