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Microplastics Presence in Cultured and Wild Sea Bream Gasrointestinal Tract
Summary
This study detected and characterized microplastics in the gastrointestinal tracts of both wild-caught and farmed sea bream from the Adriatic Sea. Finding microplastics in both farmed and wild fish indicates widespread environmental contamination and raises food safety questions for seafood consumers.
Abstract In this study, the microplastic presence of Sea bream (Sparus aurata)in the Aegean sea region in the gastrointestinal tract in two groups as culturedand wild fish was investigated. Gastrointestinal tissue samples were taken andkept in KOH solution at 40°C for 72 hours to separate the organic material.Using a sieve, the remaining large organic materials were removed and thebottom filtrate was vacuum-filtration and filtered onto whatman filter paper. Suspectedmicroplastics were examined and photographed under stereo microscopy. A total of 275 suspected microplastics of 7 different colors in the form of82% fiber, 7% fragment and 0.6% film were observed in 61 cultured fish with anaverage weight of 169±15 g. A total of 628 suspected microplastics of 9 differentcolors in the form of 43.5% fiber, 53.5% fragment and 3% film were observed in64 wild fish with an average weight of 143±19 grams. In cultured fish, the most common blue fiber was 36.5%, black fiber was25%, transparent fiber was 11.4%, white fragment was 7.5%, red fiber was 6.5%,transparent fragment was 4.6%, yellow fiber was 2.5%, black fragment was 2.5%,red fragment was 1.5%, purple fragment was 1.2% and a small amount oftransparent and blue film were found respectively. In wild sea breamgostrointestinal tract, the most commonly suspectedmicroplastics are white fragment 29.8%, blue fiber 21.6%, brownfragment 13.7%, transparent fiber 8.4%, white fiber 7.5%,transparent fragment 6.2%, red fiber 3.6%,transparent film 2.2%, red fragment 1.4%, yellow fiber 1.4%, pinkfragment 1.2%, black fiber0.6%, black fragment 0.6% anda smallamount of whitefilm, bluefragment, black fiber, purple fragment,green fiberand orangefilm. According to the results of the research, more suspected microplastics weredetected in the wild sea bream than in the cultured fish. Keywords: Mikroplastics,Sea Bream, Gastrointestinal Tract Acknowledgment: The authors would like to thank to TUBITAK. Thisresearch was funded by TÜBİTAK, Project No: (2535) 121N183