CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China; Center for Ocean Mega-Sciences, Chinese Academy of Sciences, Qingdao 266071, China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan, China; Department of Animal Production, Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt.
CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China; Center for Ocean Mega-Sciences, Chinese Academy of Sciences, Qingdao 266071, China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan, China.
Ecotoxicol Environ Saf. 2021 Feb;209:111794. doi: 10.1016/j.ecoenv.2020.111794. Epub 2020 Dec 18.
Microplastics (MPs) in the form of microfibres (MFs) are of great concern because of their size and increasing abundance, which increase their potential to interact with or be ingested by aquatic organisms. Although MFs are the dominant shape of MPs ingested by sea cucumbers in habitats, their effect on sea cucumbers remains unclear. This study examined the effect of dietary exposure to MFs on the growth and physiological status of both juvenile and adult Apostichopus japonicus sea cucumbers. MFs were mixed into the diet of sea cucumbers for 60 d at environmentally relevant concentrations of 0.6 MFs g, 1.2 MFs g and 10 MFs g. Dietary exposure to MFs, with concentrations at or above those commonly found in the habitats, did not significantly affect the growth and faecal production rate of either juvenile or adult sea cucumbers. However, a disruption in immunity indices (acid phosphatase and alkaline phosphatase activity) and oxidative stress indices (total antioxidant capacity and malondialdehyde content) was observed in juvenile and adult sea cucumbers, indicating that these indices might be useful as potential biomarkers of the exposure to MF ingestion in sea cucumbers. This study provides insights into the toxicity mechanism of MF ingestion in a commercially and ecologically important species.
微塑料（MPs）以微纤维（MFs）的形式引起了极大的关注，因为其尺寸较小且数量不断增加，这增加了它们与水生生物相互作用或被水生生物摄入的潜力。尽管 MF 是在栖息地中被海参摄入的 MPs 的主要形状，但它们对海参的影响仍不清楚。本研究探讨了膳食中暴露于 MF 对幼年和成年刺参生长和生理状态的影响。在环境相关浓度（0.6、1.2 和 10 MF g）下，将 MF 混合到海参饲料中 60 天。暴露于 MF 不会显著影响幼年或成年海参的生长和粪便产生率，即使在那些与栖息地中常见浓度相当或更高的浓度下也是如此。然而，在幼年和成年海参中观察到免疫指数（酸性磷酸酶和碱性磷酸酶活性）和氧化应激指数（总抗氧化能力和丙二醛含量）的破坏，表明这些指数可能是海参摄入 MF 暴露的潜在生物标志物。本研究为一种具有商业和生态重要性的物种中 MF 摄入的毒性机制提供了新的认识。
