Abstract：
We investigated the distribution and effects of waterborne microplastic (MP) (polyethylene microspheres, 53-63 um) on the emergent model for ecotoxicology, the amphipod Parhyale hawaiensis, during 30 days of exposure. The following life-history traits were measured: (1) survival, (2) specific growth rate (SGR), (3) reproductive performance (precopulatory pairing behavior, fecundity, and time to release neonates), (4) molting frequency, (5) F1 newborn offspring survival and (6) MP bioaccumulation. No significant mortality or molt was seen in any of the treatments. MP caused a reduction in SGR, being more pronounced in females. The time for precopulatory pairing was 3-fold longer in amphipods exposed to MP. Fecundity decreased by 50 %, and the time to release juveniles was 6.7 days longer for amphipods exposed to MP. Finally, neonate survival decreased by 80 % after ten days of release. MP disrupts the reproductive mechanisms and triggers adverse effects on life history traits in P. hawaiensis.
摘要：
我们研究了水性微塑料（MP）（聚乙烯微球，53-63um)关于生态毒理学的紧急模型，夏威夷两栖动物，在暴露的30天内。测量了以下生活史特征：(1)存活率，(2)特定增长率(SGR)，（3）繁殖性能（产前配对行为，繁殖力，和释放新生儿的时间)，(4)蜕皮频率,(5)F1新生子代存活和(6)MP生物积累。在任何治疗中均未见到显著的死亡率或蜕皮。MP导致SGR减少，在女性中更为明显。暴露于MP的两栖动物的前交配配对时间长3倍。繁殖力下降了50%，暴露于MP的两栖类动物释放幼体的时间延长了6.7天。最后,新生儿存活10天后减少80%。MP破坏了夏威夷疟原虫的生殖机制并对生活史特征产生不利影响。
