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Environ Pollut. 2019 Feb;245:1071-1078. doi: 10.1016/j.envpol.2018.11.083. Epub 2018 Nov 28.

Microplastic ingestion by the farmed sea cucumber Apostichopus japonicus in China.

Author information

1
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; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China; Center for Ocean Mega-Sciences, Chinese Academy of Sciences, Qingdao, 266071, China; Department of Animal Production, Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt.
2
Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China.
3
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; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China; Center for Ocean Mega-Sciences, Chinese Academy of Sciences, Qingdao, 266071, China.
4
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; Center for Ocean Mega-Sciences, Chinese Academy of Sciences, Qingdao, 266071, China.
5
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; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China; Center for Ocean Mega-Sciences, Chinese Academy of Sciences, Qingdao, 266071, China. Electronic address: hshyang@ms.qdio.ac.cn.

Abstract

Microplastic ingestion by the farmed sea cucumber is undocumented. Microplastics were isolated from the sea cucumber Apostichopus japonicus that was collected from eight farms along the Bohai Sea and the Yellow Sea in China. To examine microplastic ingestion, the intestines were isolated, digested and then subjected to the floatation test. The microplastic abundance in the sediment ranged from 20 to 1040 particles kg-1 of dry sediment, while the ingested microplastics ranged from 0 to 30 particles intestine-1. After filtering the coelomic fluid, the extracted microplastics from the coelomic fluid ranged from 0 to 19 particles animal-1. Thus, we speculated that microplastics may transfer to the coelomic fluid of sea cucumber. The ingested microplastics did not correlate with the animal body weight but was site dependent, suggesting that sea cucumber may serve as sentinel for microplastic pollution monitoring in the sediment. The microplastics were identified by Fourier transform infrared micro spectroscopy, and the polymer types were mainly cellophane, polyester, and polyethylene terephthalate. This study revealed that, microplastics widely existed in sea cucumber farms, and that sea cucumbers ingest microplastics as suitable with their mouth open. Moreover, the microplastics might transfer to the coelomic fluid of the sea cucumber. Further investigations are needed to assess the chronic effect of the microplastics on the growth and physiological status of the sea cucumber.

KEYWORDS:

Coelomic fluid; Deposit feeder; Microplastics ingestion; Sea cucumber; Sediment

PMID:
30682741
DOI:
10.1016/j.envpol.2018.11.083
[Indexed for MEDLINE]

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