Shellfish aquaculture often uses large amounts of plastic equipment and has been suggested as a potential source of microplastic contamination in the marine environment. To determine the influence of shellfish aquaculture on microplastic concentrations in bivalves and their environment, we compared microplastic particle (MP) concentrations in Manila clams Venerupis philippinarum and Pacific oysters Crassostrea gigas grown on commercial shellfish beaches with those in individuals of the same species grown on nearby non-aquaculture beaches in 6 regions of coastal British Columbia, Canada. MP concentrations did not differ between shellfish aquaculture and non-aquaculture sites for either bivalve species, sediment, or water samples. Plastic presence differed by site and oysters on sites with many synthetic anti-predator nets contained significantly, yet marginally, more MPs than those on sites without (0.05 vs. 0.03 g–1 dry-tissue weight on average). However, analysis of suspected MPs using Fourier-transform infrared spectroscopy in di cated a predominance of fibres from textiles (including nylon and polyester), which are not typically used in shellfish aquaculture, suggesting that this may be caused by the larger average body weight of oysters grown at non-aquaculture sites rather than by the degradation of aquaculture infrastructure.

中文翻译：

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加拿大不列颠哥伦比亚省沿海双壳类动物的微塑料及其栖息地与贝类水产养殖的邻近性

贝类水产养殖经常使用大量塑料设备，并被认为是海洋环境中微塑料污染的潜在来源。为了确定贝类水产养殖对双壳类动物及其环境中微塑料浓度的影响，我们比较了商业贝类海滩上生长的马尼拉蛤蜊 Venerupis philippinarum 和太平洋牡蛎 Crassostrea gigas 中的微塑料颗粒 (MP) 浓度与附近生长的相同物种个体中的微塑料颗粒 (MP) 浓度加拿大不列颠哥伦比亚省沿海 6 个地区的非水产养殖海滩。对于双壳类、沉积物或水样，贝类水产养殖和非水产养殖地点的 MP 浓度没有差异。塑料的存在因地点和牡蛎而异，其中许多合成的防捕食网含有显着，然而，与没有的站点相比，MP 多（平均 0.05 对 0.03 g–1 干组织重量）。然而，使用傅立叶变换红外光谱分析可疑 MP 表明主要来自纺织品（包括尼龙和聚酯）的纤维，这些纤维通常不用于贝类水产养殖，这表明这可能是由较大的平均体重引起的牡蛎生长在非水产养殖地点，而不是由于水产养殖基础设施的退化。