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Fish ingest less microplastics than assumed

Recently, an Argentinian study was published into microplastics in coastal freshwater fish captured at the Rio de la Plata. Eighty-seven fish belonging to eleven different species were studied. Microplastics were found in all fish. Plastic microfibers represented 96% of the microplastics.

However, a other research from Wageningen shows an entirely different result. Four hundred North Sea fish belonging to four different species were studied on the presence of microplastics (bigger than 20 μm). Just two microplastics were found in one fish, a sprat. How can we explain the vast difference between these two studies?

The researchers from Wageningen found it suspicious that earlier researches had reported relatively large amounts of microplastics in fish. They suspected contamination; pollution of the fish by the researchers of the earlier studies, such as fibres from clothing worn during the investigation or the presence of plastic particles in the air. That is why this time the research was designed in such a way that contamination could be eliminated.

Their conclusion: fish possibly ingest less microplastics than is generally thought.