Department of Environmental Science, Stockholm University, SE-106 91, Stockholm, Sweden.
Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
Environ Pollut. 2023 Jun 15;327:121527. doi: 10.1016/j.envpol.2023.121527. Epub 2023 Mar 28.
This study examined microplastic (MP) occurrence and abundance in marine fish collected from the western and eastern waters of Hong Kong during the wet and dry seasons. Over half (57.1%) of the fish had MP in their gastrointestinal (GI) tracts, with overall MP abundance ranging from not detected to 44.0 items per individual. Statistical analysis revealed significant spatial and temporal differences in MP occurrence, with fish from more polluted areas having a higher likelihood of MP ingestion. Additionally, fish collected in the west during the wet season had significantly higher MP abundance, likely due to influence from the Pearl River Estuary. Omnivorous fish had significantly higher MP counts than carnivorous fish, regardless of collection location or time. Body length and weight were not significant predictors of MP occurrence or abundance. Our study identified several ecological drivers that affect MP ingestion by fish, including spatial-temporal variation, feeding mode, and feeding range. These findings provide a foundation for future research to investigate the relative importance of these factors in governing MP ingestion by fish in different ecosystems and species.
本研究调查了香港西部和东部海域在干湿两季采集的海洋鱼类中微塑料（MP）的出现和丰度。超过一半（57.1%）的鱼类的胃肠道中存在 MP，总体 MP 丰度从未检出到每个个体 44.0 个不等。统计分析显示，MP 的出现存在显著的空间和时间差异，污染程度较高地区的鱼类更有可能摄入 MP。此外，在湿季采集的西部鱼类的 MP 丰度显著更高，这可能是由于珠江口的影响。无论采集地点或时间如何，杂食性鱼类的 MP 计数都明显高于肉食性鱼类。鱼体长度和体重并不是 MP 出现或丰度的显著预测因子。本研究确定了几个影响鱼类摄入 MP 的生态驱动因素，包括时空变化、摄食模式和摄食范围。这些发现为未来的研究提供了基础，以调查这些因素在不同生态系统和物种的鱼类摄入 MP 中相对重要性。
