Department of Oceanography, University of Dhaka, Dhaka 1000, Bangladesh.
Department of Statistics, University of Dhaka, Dhaka 1000, Bangladesh.
Mar Pollut Bull. 2023 Aug;193:115145. doi: 10.1016/j.marpolbul.2023.115145. Epub 2023 Jun 16.
This study investigated the prevalence of microplastics (MPs) in the gastrointestinal tract (GIT) of fish from the western coast of Bangladesh, the world's largest mangrove ecosystem. Altogether, 8 different species of fish (5 demersal and 3 pelagic) were examined. Microplastics were detected in every individual fish with an average abundance of 7.1 ± 3.14 particles per specimen. The demersal species were observed to consume more microplastics (7.78 ± 3.51) than the pelagic species (5.92 ± 2.06). Moreover, small-sized fish was found to accumulate higher MPs/body weight than large-sized fish. Polypropylene was the most abundant polymer type (45 %) and fiber was the most prevalent shape (71 %). SEM analysis revealed cracks, pits, and foreign particles on the microplastics' surface, representing their ability to bear organic pollutants and heavy metals. This study will be a source of information for future research and a guide for policy-makers to take better actions to protect and restore marine resources.
本研究调查了世界上最大的红树林生态系统——孟加拉国西部海岸鱼类胃肠道（GIT）中微塑料（MPs）的流行情况。总共检查了 8 种不同的鱼类（5 种底栖和 3 种洄游）。每个个体鱼体内都检测到微塑料，平均每个标本有 7.1±3.14 个颗粒。底栖物种被观察到摄入的微塑料（7.78±3.51）多于洄游物种（5.92±2.06）。此外，小型鱼类积累的 MPs/体重比大型鱼类更高。聚丙烯是最丰富的聚合物类型（45%），纤维是最常见的形状（71%）。SEM 分析显示微塑料表面有裂缝、凹坑和异物颗粒，这代表它们能够承载有机污染物和重金属。本研究将为未来的研究提供信息来源，并为决策者提供指导，以采取更好的行动来保护和恢复海洋资源。
