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¹ Institute of Graduate Studies in Sciences, Istanbul University, 34452 Beyazıt, Istanbul, Türk
² Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Türkiye
³ Istanbul University, Faculty of Science, Department of Physics, 34134 Vezneciler, Istanbul, Türkiye DOI : 10.4194/TRJFAS25858 Viewed : 127 - Downloaded : 85 In this study, we aimed to evaluate and characterise the microplastic pollution in the sediment and commercial fish species in the Gemlik Bay, the Marmara Sea. Our results showed that the highest concentration of microplastics in the sediment was at the station in the Gemport Harbour (9.73 pieces.kg-1) and the lowest concentration was at the Kurşunlu offshore (3.33 pieces.kg-1). The highest microplastic concentration per individual was in the gills of Synapturichthys kleinii (Risso, 1827) (14.5 pieces.ind-1) and the lowest in Diplodus annularis (Linnaeus, 1758) (0.33 pieces.ind-1). The highest concentration (8.75 pieces.ind-1) was indicated in the gastrointestinal tract of Chelidonichthys lucerna (Linnaeus, 1758), but the lowest concentration (0.88 pieces.ind-1) was in that of D. annularis species. The fiber-type particles were the most determined microplastics in both the sediment and fish samples. The Micro-Raman Spectrometer revealed that Polyvinyl chloride and polypropylene were dominant in the sediment, and polyoxymethylene and polyphenylene sulfone polymers were dominant in fish species. Keywords : Microplastic Marine pollution Micro-Raman Marine fish