Abstract：
Aquaculture is an increasingly important source of nutrition for global food security, which is reliant on animal- and plant-based feeds. Anthropogenic particles, including microplastics and semi-synthetic cellulosic fibres, are prolific marine pollutants that are readily consumed by marine organisms, including small pelagic fish commonly used in fishmeal. Conversely, there is no indication plants can accumulate anthropogenic microparticles. We explore whether aquaculture feed presents a route of contamination for farmed fish. Commercially-sourced aquaculture feedstocks, including fishmeals and soybean meal, were processed (KOH digestion and ZnCl2 density separation) and anthropogenic particles characterised using microscopy and spectroscopic methods. Both fishmeal and soybean meals contained anthropogenic particles, with concentrations ranging 1070-2000 particles kg-1. The prevalence of anthropogenic particles in plant-based feeds indicates that the majority of contamination occurs post-harvest. Based on our findings, farmed Atlantic salmon may be exposed to a minimum of 1788-3013 anthropogenic particles from aquaculture feed across their commercial lifespan.
摘要：
水产养殖是全球粮食安全日益重要的营养来源，依赖动物和植物饲料。人为粒子,包括微塑料和半合成纤维素纤维，是大量的海洋污染物，容易被海洋生物消耗，包括鱼粉中常用的小型中上层鱼。相反，没有迹象表明植物可以积累人为微粒。我们探讨水产养殖饲料是否为养殖鱼类提供污染途径。商业来源的水产养殖原料，包括鱼粉和豆粉，进行处理（KOH消化和ZnCl2密度分离），并使用显微镜和光谱法表征人为颗粒。鱼粉和大豆粉都含有人为颗粒，浓度范围为1070-2000kg-1的颗粒。植物性饲料中人为颗粒的普遍存在表明，大部分污染发生在收获后。根据我们的发现,养殖的大西洋鲑鱼在其商业寿命中可能至少暴露于水产养殖饲料中的1788-3013种人为颗粒。
