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首页> 外文期刊>Aquaculture International >Influence of nacre deposition rate on cultured pearl grade and colour in the black-lipped pearl oyster Pinctada margaritifera using farmed donor families
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Influence of nacre deposition rate on cultured pearl grade and colour in the black-lipped pearl oyster Pinctada margaritifera using farmed donor families

机译：珍珠母沉积速率对使用养殖供体的黑唇牡蛎Pinctada margaritifera养殖珍珠等级和颜色的影响

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摘要

Cultured pearl nacre deposition rate in Pinctada margaritifera oysters was studied to examine its influence on Tahitian classification grade and colour and to further our understanding of using selected donor oysters produced in a hatchery system for the improvement of these traits. A large-scale grafting experiment using 150 farmed donor oysters was realised in Rangiroa atoll (French Polynesia). After 18 months of culture, 874 pearls were harvested and 7 pearls quality traits were recorded: (1) nacre deposition rate assessed by nacre thickness and weight, (2) classification grade, lustre and surface defects, and (3) colour assessed by pearl colour darkness level and visual colour categories. Nacre deposition rate significantly influence pearl grade, surface defects, darkness level and colour categories, but not the lustre. Grade A pearls had the thickest and heaviest nacre on average, compared with grade D pearls and rejects. In addition, pearls without any surface defect had thicker and heavier nacre. Pearls with low darkness were the thinnest and the lightest. Pearls of aubergine-peacock secondary colours were the thickest and the heaviest. These results highlight the importance of rapid nacre deposition rate for increasing the production of grade A pearls, with less surface defects and dominance of a black tone colour. Fast nacre deposition may, however, have a negative impact on other pearl quality traits, such as pearl lustre. This study demonstrates the importance of examining relationships between pearl quality traits in a way that provides solid information that can be directly used for breeding and genetic selection programmes.
机译：研究了在Pinctada margaritifera牡蛎中培养的珍珠质珍珠沉积速率，以研究其对大溪地分类等级和颜色的影响，并进一步使我们了解如何使用孵化系统中精选的供体牡蛎来改善这些性状。在兰吉罗阿环礁（法属波利尼西亚）实现了使用150只养殖供体牡蛎的大规模嫁接试验。培养18个月后，收获了874颗珍珠，并记录了7颗珍珠的品质特征：（1）通过珍珠层的厚度和重量评估珍珠层沉积率;（2）分类等级，光泽和表面缺陷;以及（3）通过珍珠评估颜色颜色暗度和视觉颜色类别。珍珠母沉积速率显着影响珍珠等级，表面缺陷，暗度和颜色类别，但不影响光泽。与D级珍珠和废品相比，A级珍珠的珍珠层平均最厚。另外，没有任何表面缺陷的珍珠的珍珠层更浓，更重。黑暗程度低的珍珠是最薄和最亮的。茄子-孔雀二色珍珠最厚，最重。这些结果突出了快速珍珠质沉积速率对于提高A级珍珠产量，减少表面缺陷和黑色调优势的重要性。但是，快速的珍珠质沉积可能会对其他珍珠质量特性（例如珍珠光泽）产生负面影响。这项研究证明了以可提供可直接用于育种和基因选择计划的可靠信息的方式检查珍珠品质性状之间关系的重要性。

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