Department of Biology, Biochemistry Unit, Alzahra University, Tehran, Iran.
School for Resource and Environmental Studies, Dalhousie University, Halifax, NS, B3H 4R2, Canada.
Environ Sci Pollut Res Int. 2019 Aug;26(23):23777-23787. doi: 10.1007/s11356-019-05637-6. Epub 2019 Jun 17.
Microplastics (MPs) are environmental contaminants that are of increasing global concern. This study investigated the presence of MPs in four varieties of marine-derived commercial fish meal, followed by identification of their polymer composition using Fourier transform infrared (FTIR) spectroscopy. Exposure experiments were conducted on cultured common carp (Cyprinus carpio) by feeding four varieties of commercially available fish meal to determine relationships between abundance and properties of MPs found both in meal and in those transferred to cultured common carp. Mean particle sizes were 452 ± 161 μm (± SD). Fragments were the predominant shape of MP found in fish meal (67%) and C. carpio gastrointestinal tract and gills (65%), and polypropylene and polystyrene were the most present plastic polymers found in fish meal (45% and 24%, respectively) and C. carpio (37% and 33%, respectively). Positive relationships were found between MP levels in fish meal and C. carpio. This study highlights that marine-derived fish meal may be a source of MPs which can be transferred to cultured fish, thus posing a concern for aquaculture.
微塑料（MPs）是一种环境污染物，越来越受到全球关注。本研究调查了四种海洋衍生商业鱼粉中 MPs 的存在情况，然后使用傅里叶变换红外（FTIR）光谱法鉴定其聚合物组成。通过投喂四种市售鱼粉对养殖鲤鱼进行暴露实验，以确定在鱼粉和转移到养殖鲤鱼中的 MPs 的丰度与特性之间的关系。平均粒径为 452±161μm（±SD）。在鱼粉（67%）和鲤鱼胃肠道和鳃（65%）中，碎片是 MPs 发现的主要形状，在鱼粉（分别为 45%和 24%）和鲤鱼（分别为 37%和 33%）中，发现最常见的塑料聚合物是聚丙烯和聚苯乙烯。在鱼粉和鲤鱼中均发现 MPs 水平与 MP 水平之间存在正相关关系。本研究强调，海洋衍生鱼粉可能是 MPs 的来源，这些 MPs 可以转移到养殖鱼类中，从而对水产养殖构成威胁。
