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Fish Ingest Microplastics Unintentionally
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-07-23 , DOI: 10.1021/acs.est.1c01753 Bowen Li 1 , Weiwenhui Liang 1 , Quan-Xing Liu 2 , Shijian Fu 3 , Cuizhu Ma 1 , Qiqing Chen 1 , Lei Su 1 , Nicholas J Craig 4 , Huahong Shi 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-07-23 , DOI: 10.1021/acs.est.1c01753 Bowen Li 1 , Weiwenhui Liang 1 , Quan-Xing Liu 2 , Shijian Fu 3 , Cuizhu Ma 1 , Qiqing Chen 1 , Lei Su 1 , Nicholas J Craig 4 , Huahong Shi 1
Affiliation
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Microplastics (size of plastic debris <5 mm) occur in various environments worldwide these days and cause detrimental effects on biota. However, the behavioral responses of fish to microplastics in feeding processes are not well understood. In the present study, juveniles from four fish species and two common shapes of microplastics were used to explore fish feeding responses. We found swallowing-feeding fish ingested more pellets than filtering- and sucking-feeding fish. With high-definition and high-speed observational experiments, we found that all species did not actively capture microfibers; instead, they passively sucked in microfibers while breathing. Surprisingly, fish showed a rejective behavior, which was spontaneously coughing up microfibers mixed with mucus. Nevertheless, some of the microfibers were still found in the gastrointestinal tracts and gills of fish, while abundances of ingested microfibers were increased in the presence of food. Our findings reveal a common phenomenon that fish ingest microplastics inadvertently rather than intentionally. We also provide insights into the pathways via which microplastics enter fish and potential strategies to assess future ecological risk and food safety related to microplastics.
中文翻译：
鱼无意中摄入微塑料
如今，微塑料（塑料碎片尺寸 <5 毫米）出现在世界各地的各种环境中，并对生物群造成不利影响。然而，鱼类在摄食过程中对微塑料的行为反应尚不清楚。在本研究中，来自四种鱼类和两种常见形状的微塑料的幼鱼被用来探索鱼类的摄食反应。我们发现吞食鱼比过滤和吸食鱼摄入了更多的颗粒。通过高清、高速的观测实验，我们发现并非所有物种都主动捕捉微纤维；相反，它们在呼吸时被动地吸入微纤维。令人惊讶的是，鱼表现出排斥行为，即自发地咳出混有粘液的微纤维。尽管如此，一些微纤维仍然存在于鱼类的胃肠道和鳃中，而在食物存在的情况下，摄入的微纤维含量会增加。我们的研究结果揭示了一种普遍现象，即鱼类无意中而非有意地摄入了微塑料。我们还深入了解微塑料进入鱼类的途径，以及评估与微塑料相关的未来生态风险和食品安全的潜在策略。
更新日期：2021-08-03
中文翻译：
鱼无意中摄入微塑料
如今，微塑料（塑料碎片尺寸 <5 毫米）出现在世界各地的各种环境中，并对生物群造成不利影响。然而，鱼类在摄食过程中对微塑料的行为反应尚不清楚。在本研究中，来自四种鱼类和两种常见形状的微塑料的幼鱼被用来探索鱼类的摄食反应。我们发现吞食鱼比过滤和吸食鱼摄入了更多的颗粒。通过高清、高速的观测实验，我们发现并非所有物种都主动捕捉微纤维；相反，它们在呼吸时被动地吸入微纤维。令人惊讶的是，鱼表现出排斥行为，即自发地咳出混有粘液的微纤维。尽管如此，一些微纤维仍然存在于鱼类的胃肠道和鳃中，而在食物存在的情况下，摄入的微纤维含量会增加。我们的研究结果揭示了一种普遍现象，即鱼类无意中而非有意地摄入了微塑料。我们还深入了解微塑料进入鱼类的途径，以及评估与微塑料相关的未来生态风险和食品安全的潜在策略。
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