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. 2018 Nov 6;8:16422. doi: 10.1038/s41598-018-34590-6

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Photographs of representative marine microdebris in juvenile coral trout. Marine microdebris was detected in the gastrointestinal tract of 20 individual juvenile coral trout (Plectropomus leopardus and P. maculatus) collected on reefs around (a) Lizard Island, (b) Orpheus Island, (c) Heron Island, and (d) One Tree Island, in the Great Barrier Reef World Heritage Area, Australia, in 2011. Examples of chemical type assignments for marine microdebris include: (a) semi-synthetic: cellulose-derived (4), NFPC: nylon (5); naturally-derived: cellulose-natural (1, 6, 7); (b) semi-synthetic: cellulose-derived (1, 2, 3, 5, 6), NFPC: nylon (8); naturally-derived: cellulose-natural (7), keratin (4); (c) synthetic: polyester (8); semi-synthetic: NFPC: nylon (5, 6), NFPC: polyester (1); naturally-derived: cellulose-natural (2, 3, 9); (d) semi-synthetic: cellulose-derived (6), NFPC: nylon (5), NFPC: polyurethane (1); naturally-derived: cellulose-natural (4, 7), keratin (3). For the following items, natural origin (a2, a3, a8) or contamination (b9, c4) could not be ruled out. Chemical type was not assigned to fibre c7 (fibre was missing) and d2 (<60% match). NFPC = natural fibre reinforced polymer composites.