The Pacific oyster (Crassostrea gigas) and the Portuguese oyster (C. angulata) are important oyster species for commercial aquaculture. In this study, three stocking density regimes, including 20, 30 and 40 oysters/basket, were used to study the effects of stocking density on growth performance, survival rate and lipid nutritional quality of diploid and triploid C. gigas and C. angulata. The experiment lasted 163 days, from to 22 November 2011 to 3 April 2012. The main findings of this study are as follows: (1) C. gigas has growth advantage over C. angulata in Shantou waters; (2) geographic origin of the oysters has an impact on the overall performance of diploid and triploid oysters; (3) triploids are generally no growth and survival advantage over diploids in spring and summer; (4) oysters at low stocking density were generally outperformed those at high stocking density; (5) lipid composition of oysters is not affected by ploidy and stocking density; (6) in Shantou waters, C. angulata is more nutritious than C. gigas. This study compares the performance of C. gigas and C. angulata triploidy for the first time. The findings of this study can provide useful information to be applied in oysters aquaculture.

中文翻译：

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放养密度对温水养殖二倍体和三倍体、太平洋牡蛎长牡蛎和葡萄牙牡蛎养殖性能的影响

太平洋牡蛎（牡蛎）和葡萄牙牡蛎（Ç。 角线）是商业养殖牡蛎的重要品种。本研究采用 20、30 和 40 只牡蛎/篮 3 种饲养密度方案，研究了饲养密度对二倍体和三倍体C生长性能、成活率和脂质营养品质的影响。 吉加斯和C . 安古拉塔。实验持续163天，从2011年11月22日至2012年4月3日该研究的主要结果如下：（1）Ç。 gigas比C具有增长优势。 安古拉塔在汕头水域；(2)牡蛎的地理来源对二倍体和三倍体牡蛎的综合性能有影响；(3)三倍体在春夏季一般没有二倍体生长和生存优势；(4) 低放养密度的牡蛎普遍优于高放养密度的生蚝；(5)牡蛎的脂质成分不受倍性和放养密度的影响；(6) 汕头海域，C． angulata比C更有营养。 吉加斯。本研究比较了C的性能。 吉加斯和C . 安古拉塔第一次出现三倍体。本研究的结果可为牡蛎养殖提供有用的信息。