New in Asian Journal of Ecotoxicology

Uptake and Elimination of Microplastics by Tigriopus japonicus and Its Impact on Feeding Behavior

Recently the ecotoxicological effects of microplastics, as one of the frontier research issues in international environmental fields, have been a cause for concern. However, uptake and elimination kinetics of microplastics by biota have rarely been investigated due to the difficulties in their quantitative analysis. In this study, the uptake and elimination of microplastics by Tigriopus japonicas (see Figure 1) were investigated by using 10 μm polystyrene microspheres. Meanwhile, the impacts of polystyrene microspheres on the feeding behavior of T. japonicus were also assessed. The results indicate that with the increase of the exposure time the amount of polystyrene microspheres detected in T. japonicus increased. The highest level of polystyrene microspheres detected in T. japonicus was (7.00 ± 2.44) particles·individual⁻¹ (n = 3) when exposed to polystyrene microspheres at the nominal concentration of 1 × 103 particles·mL⁻¹ over 24 h. After 48 h, the amount of ingested polystyrene microspheres decreased to (3.20 ± 1.93) particles·individual⁻¹ (n = 3). After the exposure, T. japonicus were transferred to clean seawater. The amount of polystyrene microspheres in T. japonicus decreased dramatically with the increase of the exposure time. The polystyrene microspheres were eliminated quickly with a high clearance percentage of 96.33 ± 1.18% (n = 3) after depuration of 24 h, and the authors did not find polystyrene microspheres in T. japonicus after depuration of 48 h. Moreover, there were no significant differences for the microalgae ingestion rates in the presence of 1 × 103 particles·mL⁻¹ polystyrene microspheres over 24 h and 48 h (p > 0.05). Overall, these results could provide evidence for assessing the ecological risks of microplastics.

• Liu Q, Mingxing Z, Guanghui D, Xishan L, Dian Z, Weiwei Z, Ying W, Juying W. 2020. Uptake and elimination of microplastics by Tigriopus japonicus and its impact on feeding behavior. Asian Journal of Ecotoxicology 15:184–191. DOI: 10.7524/AJE.1673-5897.20191216002. Available from: http://www.stdlxb.cn/en/article/doi/10.7524/AJE.1673-5897.20191216002

中文翻译：

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Spotlights 是编辑选择的论文，发表在同行评审期刊上，这些论文可能更具区域性或以英语以外的语言出现

新的亚洲生态毒理学杂志的

日本虎鲸对微塑料的吸收和消除及其对摄食行为的影响

近年来，微塑料的生态毒理学效应作为国际环境领域的前沿研究问题之一，备受关注。然而，由于定量分析的困难，很少研究生物群对微塑料的吸收和消除动力学。在这项研究中，使用 10 μm 聚苯乙烯微球研究了虎斑虎鱼（见图 1）对微塑料的吸收和消除。同时，还评估了聚苯乙烯微球对T. japonicus取食行为的影响。结果表明，随着暴露时间的增加，T. japonicus 中检测到的聚苯乙烯微球的数量增加。 当暴露于标称浓度为 1 × 103 个粒子·mL ^{-1 的}聚苯乙烯微球超过 24 小时时，在日本刺参中检测到的聚苯乙烯微球的最高水平为 (7.00 ± 2.44) 个粒子·个体^-1 ( n = 3) 。48小时后，摄入的聚苯乙烯微球的数量减少到（3.20±1.93）个粒子·个体^-1（n  =3）。暴露后，T. japonicus被转移到干净的海水中。刺参中聚苯乙烯微球的含量随着曝光时间的增加而显着下降。 净化24 h后聚苯乙烯微球清除速度快，清除率高达96.33±1.18%（n =3），作者在净化48 h后未在T. japonicus中发现聚苯乙烯微球。此外，在 1 × 103 颗粒·mL ^-1聚苯乙烯微球存在下，24 小时和 48 小时内微藻摄取率没有显着差异（p  > 0.05）。总的来说，这些结果可以为评估微塑料的生态风险提供证据。

• Liu Q、Mingxing Z、Guanghui D、Xishan L、Dian Z、Weiwei Z、Ying W、Juying W. 2020. 日本虎鲸对微塑料的吸收和消除及其对摄食行为的影响。亚洲生态毒理学杂志 15：184-191。DOI：10.7524/AJE.1673-5897.20191216002。可从：http://www.stdlxb.cn/en/article/doi/10.7524/AJE.1673-5897.20191216002