Investigating the presence of microplastics in demersal sharks of the North-East Atlantic.

Scientific Reports
Kristian J PartonTamara S Galloway

Abstract

Microplastic pollution is ubiquitous in the marine environment and is ingested by numerous marine species. Sharks are an understudied group regarding their susceptibility to microplastic ingestion. Here, we provide evidence of ingestion of microplastic and other anthropogenic fibres in four demersal sharks species found in the waters of the United Kingdom and investigate whether body burdens of contamination vary according to species, sex or size. Sharks were collected from the North-East Atlantic. Stomachs and digestive tracts of 46 sharks of 4 species were examined and 67% of samples contained at least one contaminant particle. Although we acknowledge modest sample size, estimated particle burden increased with body size but did not vary systematically with sex or species. A total of 379 particles were identified, leading to median estimates ranging from 2 to 7.5 ingested contaminants per animal for the 4 species. The majority were fibrous in nature (95%) and blue (88%) or black (9%) in colour. A subsample of contaminants (N = 62) were subject to FT-IR spectroscopy and polymers identified as: synthetic cellulose (33.3%), polypropylene (25%), polyacrylamides (10%) and polyester (8.3%). The level of risk posed to shark species ...Continue Reading

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Citations

Feb 14, 2021·Bulletin of Environmental Contamination and Toxicology·Ellana MorganAndrea Gaion
Mar 4, 2021·Environmental Science and Pollution Research International·Merlin N Issac, Balasubramanian Kandasubramanian
Mar 21, 2021·The Science of the Total Environment·Abhijit MallikBinaya Bhusan Nayak

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Methods Mentioned

BETA
dissection
Infrared spectroscopy
light microscopy
biopsy
chip

Software Mentioned

MuMIn
R
MASS package

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