'The Plastic Nile': First Evidence of Microplastic Contamination in Fish from the Nile River (Cairo, Egypt)

• Published in: Toxics (Basel) Vol. 8; no. 2; p. 22
• Main Authors: Khan, Farhan R, Shashoua, Yvonne, Crawford, Alex, Drury, Anna, Sheppard, Kevin, Stewart, Kenneth, Sculthorp, Toby
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 25.03.2020; MDPI
• Subjects: africa; atr-ftir spectroscopy; Catfish; catfish (bagrus bajad); Contamination; Dissection; fibers; Fish; Fourier transforms; freshwater; Freshwater environments; Gastrointestinal tract; Infrared spectroscopy; Ingestion; Laboratories; Microplastics; nile tilapia (oreochromis niloticus); Oreochromis niloticus; Plastic debris; Plastic pollution; Plastics; Polyethylene; Polyethylene terephthalate; Polypropylene; Rivers; Tilapia; Tourism; South America; Asia; Nile River; Europe; Egypt; Africa; North America; Lake Victoria; catfish (Bagrus Bajad); ATR-FTIR spectroscopy; fibers; Africa; microplastics; freshwater; ingestion; Nile tilapia (Oreochromis niloticus)
• ISSN: 2305-6304; 2305-6304
• DOI: 10.3390/toxics8020022

The presence of microplastics (MPs) in the world's longest river, the Nile River, has yet to be reported. This small-scale study aimed to provide the first information about MPs in the Nile River by sampling the digestive tracts of two fish species, the Nile tilapia ( , = 29) and catfish ( , = 14). Fish were purchased from local sellers in Cairo, and then their gastrointestinal tracts were dissected and examined for MPs. Over 75% of the fish sampled contained MPs in their digestive tract (MP prevalence of 75.9% and 78.6% for Nile tilapia and catfish, respectively). The most abundant MP type was fibers (65%), the next most abundant type was films (26.5%), and the remaining MPs were fragments. Polyethylene (PE), polyethylene terephthalate (PET) and polypropylene (PP) were all non-destructively identified by attenuated total reflectance Fourier transform infrared spectroscopy. A comparison with similar studies from marine and freshwater environments shows that this high level of MP ingestion is rarely found and that fish sampled from the Nile River in Cairo are potentially among the most in danger of consuming MPs worldwide. Further research needs to be conducted, but, in order to mitigate microplastic pollution in the Nile River, we must act now.