We identified and characterized microplastics (MPs) in the gastrointestinal tract (GT), gills (GI), and exoskeleton (EX) of Litopenaeus vannamei in a coastal lagoon from the SE Gulf of California. The most common MPs were fibers and fragments with an average size of 403 ± 296 μm, in which the transparent and blue colors predominated. The abundance (items/g as wet weight (ww)) in the GT, GI, and EX was 114.7 ± 33.2, 13.7 ± 5.3 and 3.0 ± 0.5, respectively. The abundance of MPs per shrimp was 13.3 ± 1.1, while the abundance per individual (ww) was 0.9 ± 0.2 MPs/g. Considering the consumption of shrimp in Mexico, MP abundance, and shrimp consumption (discarding GI and EX), we estimated MP ingestion as 280 items/person/year. The results from this study can be used as background information for future MP biomonitoring in shrimp species of ecological and commercial importance.

我们鉴定并表征了南美白对虾胃肠道 (GT)、鳃 (GI) 和外骨骼 (EX) 中的微塑料 (MPs)在加利福尼亚湾东南部的沿海泻湖中。最常见的 MP 是平均尺寸为 403 ± 296 μm 的纤维和碎片，其中透明和蓝色占主导地位。GT、GI 和 EX 中的丰度（项目/g 湿重 (ww)）分别为 114.7 ± 33.2、13.7 ± 5.3 和 3.0 ± 0.5。每只虾的 MPs 丰度为 13.3 ± 1.1，而每个个体 (ww) 的丰度为 0.9 ± 0.2 MPs/g。考虑到墨西哥的虾消费量、MP 丰富度和虾消费量（丢弃 GI 和 EX），我们估计 MP 摄入量为 280 件/人/年。这项研究的结果可用作未来对具有生态和商业重要性的虾种进行 MP 生物监测的背景信息。