Institute of Exact Sciences and Technology, Federal University of Amazonas, Rua Nossa Senhora do Rosário, 3863, Tiradentes, Itacoatiara, Amazonas, 69103-128, Brazil.
Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Professor Lineu Prestes, 748 - B4T, São Paulo, Butantã, 05508-000, Brazil.
Environ Monit Assess. 2023 Mar 1;195(3):434. doi: 10.1007/s10661-023-11019-w.
The present study analyzed the presence of microplastics (MPs) in the shrimp Macrobrachium amazonicum, which is an economically important food that is consumed in several regions of the Brazilian Amazon. A total of 600 specimens of M. amazonicum were captured at two sampling sites (urban and rural area). A total of 2597 MP particles were recorded in the shrimps, with a significant difference between the two sites. The presence of MPs in the body parts also differed significantly. No significant difference was found between MPs abundance and sex of the shrimps. The size of the MPs did not differ significantly between the collection sites and between the body parts. Dark blue fiber-type MPs were the most abundant. A positive correlation was observed between the abundance of MPs and the total weight of shrimps. Raman spectroscopy identified the dark blue fibers as polypropylene and the FTIR technique identified the light blue fragments as nylon. The results indicate that the presence of MPs in the M. amazonicum shrimp is associated with the capture sites near the urban area and is present in the diet of the Amazonian population that regularly consumes this crustacean in traditional dishes.
本研究分析了虾类亚马逊沼虾体内微塑料（MPs）的存在情况，亚马逊沼虾是一种经济上重要的食品，在巴西亚马逊地区的几个地区都有食用。在两个采样点（城市和农村地区）共捕获了 600 只亚马逊沼虾。在虾体内共记录到 2597 个 MPs 颗粒，两个地点之间存在显著差异。 MPs 在虾体各部位的存在也存在显著差异。 MPs 丰度与虾的性别之间无显著差异。 MPs 的大小在采集地点和虾体各部位之间没有显著差异。深蓝色纤维状 MPs 最为丰富。 MPs 丰度与虾总重量之间存在正相关关系。拉曼光谱鉴定深蓝色纤维为聚丙烯，傅里叶变换红外（FTIR）技术鉴定浅蓝色碎片为尼龙。结果表明，亚马逊沼虾体内存在 MPs 与城市附近的捕捞地点有关，并且存在于经常食用这种甲壳类动物的亚马逊人口的饮食中。
