摘要

我们调查了在东京湾采集的64条日本鳀鱼（raul鱼）的消化道中的微塑料。在64条鱼中有49条（77％）检测到塑料，平均2.3件，个体最多15件。所有的塑料通过傅里叶变换红外光谱鉴定。大部分是聚乙烯（52.0％）或聚丙烯（43.3％）。大多数塑料是碎片（86.0％），但是7.3％是珠子，其中一些是微珠，类似于在面部清洁剂中发现的那些。百分之八十的塑料尺寸范围在150-1000微米之间，小于海面浮动微塑料的报告尺寸范围，可能是因为鳀鱼的地下觅食行为反映了地表水和地下之间塑料的不同尺寸分布水域。 是世界各地许多人类和其他生物的重要食物。我们的观察进一步证实微塑料已渗入海洋生态系统，人类可能会接触到它们。由于微塑料保留有害化学物质，因此摄取塑料引起的鱼类化学品暴露增加是令人担忧的。应该研究这种暴露，并与自然饮食中的暴露进行比较。

We investigated microplastics in the digestive tracts of 64 Japanese anchovy (Engraulis japonicus) sampled in Tokyo Bay. Plastic was detected in 49 out of 64 fish (77%), with 2.3 pieces on average and up to 15 pieces per individual. All of the plastics were identified by Fourier transform infrared spectroscopy. Most were polyethylene (52.0%) or polypropylene (43.3%). Most of the plastics were fragments (86.0%), but 7.3% were beads, some of which were microbeads, similar to those found in facial cleansers. Eighty percent of the plastics ranged in size from 150 μm to 1000 μm, smaller than the reported size range of floating microplastics on the sea surface, possibly because the subsurface foraging behavior of the anchovy reflected the different size distribution of plastics between surface waters and subsurface waters.Engraulis spp. are important food for many humans and other organisms around the world. Our observations further confirm that microplastics have infiltrated the marine ecosystem, and that humans may be exposed to them. Because microplastics retain hazardous chemicals, increase in fish chemical exposure by the ingested plastics is of concern. Such exposure should be studied and compared with that in the natural diet.

https://www.nature.com/articles/srep34351/