Abstract：
Enhancement of shellfish populations has long been discussed as a potential nutrient reduction tool, and eastern oyster aquaculture was recently approved as a nutrient reduction best management practice (BMP) in Chesapeake Bay, USA. This study addressed BMP-identified data gaps involving variation in nutrient concentration related to ploidy, effects of reproductive development, and a paucity of phosphorus concentration data. Diploid and triploid oysters were collected from farms in Maryland and Virginia across the typical local reproductive cycle. The nutrient concentration of tissue and shell was consistent with the currently implemented BMP. Minor variation observed in nitrogen and phosphorus concentration was within the previously reported range, for farm location, ploidy, and reproductive cycle timing. Ploidy-based differences in tissue dry weight were not observed at either farm, which contrasts with current nutrient reduction estimates. These results suggest separate crediting values for diploids and triploids may need further investigation and potential re-evaluation.
摘要：
贝类种群的增加一直被认为是一种潜在的营养减少工具，东部牡蛎水产养殖最近被批准为切萨皮克湾的营养减少最佳管理实践（BMP），美国。这项研究解决了BMP鉴定的数据空白，涉及与倍性有关的养分浓度变化，生殖发育的影响，磷浓度数据很少。在典型的当地生殖周期中，从马里兰州和弗吉尼亚州的农场收集了二倍体和三倍体牡蛎。组织和壳的营养浓度与当前实施的BMP一致。在氮和磷浓度中观察到的微小变化在先前报告的范围内，对于农场的位置，倍性,和生殖周期计时。在两个农场均未观察到组织干重的基于倍性的差异，这与目前的营养减少估计形成对比。这些结果表明，二倍体和三倍体的单独信用值可能需要进一步调查和潜在的重新评估。
