Cited by 295Microplastics and Plastic PollutionEnvironmental Toxicology and EcotoxicologyPharmaceutical and Antibiotic Environmental Impacts

Evidence of Microplastic Translocation in Wild-Caught Fish and Implications for Microplastic Accumulation Dynamics in Food Webs

McIlwraith, Hayley K., Kim, Joel, Helm, Paul, Bhavsar, Satyendra P., Metzger, Jeremy S., Rochman, Chelsea M.·2021·Environmental Science & Technology

Abstract

The presence of microplastics within the gut of animals is well documented. Whether microplastics bioaccumulate in organisms and biomagnify in food webs remains unclear and relies on the ability of microplastics to translocate to other tissues. Here, we demonstrate the widespread presence of microplastics and other anthropogenic microparticles in the gastrointestinal tract, fillet, and livers of seven species of sportfish from Lake Simcoe, Ontario, Canada. Larger fish had a higher microplastic load compared to smaller fish, but the opposite trend was observed with translocated microplastics standardized by fish mass (i.e., smaller fish contained more translocated particles per gram wet weight than larger fish). Moreover, we observed no evidence of biomagnification as there was no significant relationship between the trophic level and total or translocated microplastics per individual. Overall, this suggests that microplastics are translocating, but that excretion of translocated particles or growth dilution may be occurring rather than bioaccumulation and biomagnification. Moreover, the assemblages of shapes and material types varied among tissues, suggesting that particle characteristics may predict biological fate. Our findings highlight the need for further work to understand the mechanisms of microplastic translocation and excretion and the implications for the dynamics of microplastics accumulation in food webs and human exposure.

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Crossref · 10.1021/acs.est.1c02922

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Authors
McIlwraith, H. K., Kim, J., Helm, P., Bhavsar, S. P., Metzger, J. S., & Rochman, C. M.
Affiliations
  • University of Toronto (CA)
  • Ministry of the Environment, Conservation and Parks (CA)
Corresponding author
Rochman, Chelsea M.
Venue
Environmental Science & Technology
Published
2021-09-09
Volume
55
Issue
18
Pages
12372-12382
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W3197256738
Cited by
295
References
96
Citations by year
2026: 59 · 2025: 60 · 2024: 64 · 2023: 70 · 2022: 37 · 2021: 5
FWCI
10.91
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Minist??re de l'Environnement, de la Protection de la nature et des Parcs (LS-16-17-008)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
Keywords
microplastics, biomagnification, bioaccumulation, food webs, sport fish, wild fish, gastrointestinal tract, liver, fillet, fish size, Lake Simcoe, human exposure
MeSH terms
Microplastics, Animals, Environmental Monitoring, Humans, Ontario, Plastics, Water Pollutants, Chemical, Food Chain

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