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Microplastics FTIR characterisation and distribution in the water column and digestive tracts of small pelagic fish in the Gulf of Lions
Summary
Researchers found microplastics in 93% of water column samples and in 12% of sardines and 11% of anchovies sampled from the Gulf of Lions in the NW Mediterranean Sea, characterizing plastic composition by FTIR and finding similar debris types in both water and fish digestive tracts.
This study aims at quantifying and characterising microplastics (MP) distribution in the water column of the NW Mediterranean Sea as well as MP ingestion by the 2 main planktivorous fish of the area, sardine and anchovy. Debris of similar sizes were found in all water column samples and in all but 2 fish guts (out of 169). MP were found in 93% of water column samples with an average concentration of 0.23 ± 0.20 MP·m, but in only 12% of sardines (0.20 ± 0.69 MP·ind) and 11% of anchovies (0.11 ± 0.31 MP·ind). Fibres were the only shape of MP encountered and polyethylene terephthalate was the main polymer identified in water columns (61%), sardines (71%) and anchovies (89%). This study confirms the ubiquity of MP in the Mediterranean Sea and imparts low occurrence in fish digestive tracts.