Fisheries Resource Harvest and Post-Harvest Management Division, ICAR-Central Institute of Fisheries Education (CIFE), Mumbai, Maharashtra, 400061, India.
Aquatic Environmental Management Department, ICAR-Central Institute of Fisheries Education (CIFE), Mumbai, Maharashtra, 400061, India.
Environ Sci Pollut Res Int. 2021 Sep;28(35):48494-48504. doi: 10.1007/s11356-021-14121-z. Epub 2021 Apr 28.
Accumulation of microplastics (MPs) in marine organisms poses an imminent environmental threat and health risk due to the possibility of trophic transfer of accumulated MPs in ecologically important food chains. In this context, a field-level study was conducted on the fishing grounds of the north eastern part of the Arabian Sea through experimental fishing, and the gastrointestinal tracts (GT) of three different species of shrimps (n=180) were examined for the incidence of microplastics. The results showed that all shrimp caught from the fishing grounds had significant levels of MPs in the gastrointestinal tracts. A total number of 1220 microplastic items were recorded from the pooled samples, with an average of 6.78 ± 2.80 items per individual. The gastrointestinal tract showed an average number of 70.32 ± 34.67 MPs per gram of the gut material. The MPs with the size range of 100-250 μm were the most abundant form found in the shrimp species analyzed. Among the colored MP particles, black color was the most dominant (30.16%) form of MP. Fibers, fragments, pellets, beads, and films were the common morphotypes; however, fibers showed an occurrence of 39.40%, 47.39%, and 41.89% in the GTs of Metapenaeus monoceros, Parapeneopsis stylifera, and Penaeus indicus, respectively. In the present study, six types of plastic polymers were identified from the GTs of the studied samples. The findings confirm the presence of microplastics in the natural habitats of shrimps beyond the coast and indicate that shrimps caught from these coastal fishing grounds contain MPs in their gut. The findings underline the immediate scientific intervention for the microplastic reduction in the marine environment.
微塑料（MPs）在海洋生物体内的积累对生态环境构成了迫在眉睫的威胁，并存在健康风险，因为在生态重要的食物链中，积累的 MPs 可能会发生营养转移。在这种情况下，通过实验性捕捞，在阿拉伯海东北部的渔区进行了实地研究，并对三种不同虾类（n=180）的胃肠道（GT）进行了检查，以确定微塑料的存在情况。结果表明，从渔区捕获的所有虾类 GT 中都存在明显水平的 MPs。从混合样本中记录到总共 1220 个微塑料物品，平均每个个体有 6.78 ± 2.80 个。GT 中平均每克肠组织中存在 70.32 ± 34.67 个 MPs。在所分析的虾类中，尺寸范围在 100-250 μm 的 MPs 是最丰富的形式。在有色 MPs 颗粒中，黑色是最主要（30.16%）的 MPs 形式。纤维、碎片、颗粒、珠子和薄膜是常见的形态类型；然而，纤维在 GT 中的出现频率分别为 Metapenaeus monoceros 中的 39.40%、Parapeneopsis stylifera 中的 47.39%和 Penaeus indicus 中的 41.89%。在本研究中，从研究样本的 GT 中鉴定出六种类型的塑料聚合物。研究结果证实了 MPs 存在于虾类的自然栖息地中，并且表明从这些沿海渔区捕获的虾类的 GT 中含有 MPs。研究结果强调了在海洋环境中立即进行减少微塑料的科学干预的必要性。
