Microplastics in livers of European anchovies (Engraulis encrasicolus, L.)

• Published in: Environmental pollution (1987) Vol. 229; pp. 1000 - 1005
• Main Authors: Collard, France, Gilbert, Bernard, Compère, Philippe, Eppe, Gauthier, Das, Krishna, Jauniaux, Thierry, Parmentier, Eric
• Format: Journal Article Web Resource
• Language: English
• Published: England Elsevier Ltd 01.10.2017; Elsevier
• Subjects: Animals; Aquatic sciences & oceanology; Atlantic herring; Clupea harengus; Clupeiformes; Engraulis encrasicolus; Environmental Monitoring; Environmental Sciences; Environmental sciences & ecology; Fishes - metabolism; Life sciences; Liver; Liver - chemistry; Liver - metabolism; Microplastic; Plastics; Plastics - analysis; Plastics - metabolism; Raman spectroscopy; Sardina pilchardus; Sciences aquatiques & océanologie; Sciences de l’environnement & écologie; Sciences du vivant; Translocation; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism; Translocation; Engraulis encrasicolus; Microplastic; Raman spectroscopy; Clupeiformes; Liver
• ISSN: 0269-7491; 1873-6424; 1873-6424
• DOI: 10.1016/j.envpol.2017.07.089

Microplastics (MPs) are thought to be ingested by a wide range of marine organisms before being excreted. However, several studies in marine organisms from different taxa have shown that MPs and nanoplastics could be translocated in other organs. In this study, we investigated the presence of MPs in the livers of commercial zooplanktivorous fishes collected in the field. The study focuses mainly on the European anchovy Engraulis encrasicolus but concerns also the European pilchard Sardina pilchardus and the Atlantic herring Clupea harengus. Two complementary methodologies were used to attest the occurrence of MPs in the hepatic tissue and to exclude contamination. 1) MPs were isolated by degradation of the hepatic tissue. 2) Cryosections were made on the livers and observed in polarized light microscopy. Both methods separately revealed that MPs, mainly polyethylene (PE), were translocated into the livers of the three clupeid species. In anchovy, 80 per cent of livers contained relatively large MPs that ranged from 124 μm to 438 μm, showing a high level of contamination. Two translocation pathways are hypothesized: (i) large particles found in the liver resulted from the agglomeration of smaller pieces, and/or (ii) they simply pass through the intestinal barrier. Further studies are however required to understand the exact process. [Display omitted] •Microplastics were found for the first time in liver of wild Clupeiforme fishes.•Eighty per cent of anchovies had one or more microplastic(s) in their liver.•Microplastics measured 323 μm on average. Microplastics are translocated in the liver of wild fishes meaning that microplastic pollution has a more important impact than previously supposed.