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Low abundance of microplastics in commercially caught fish across southern Australia
Citation
Wootton, N and Reis-Santos, P and Dowsett, N and Turnbull, A and Gillanders, BM, Low abundance of microplastics in commercially caught fish across southern Australia, Environmental Pollution, 290 Article 118030. ISSN 0269-7491 (2021) [Refereed Article]
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DOI: doi:10.1016/j.envpol.2021.118030
Abstract
Plastic pollution has increased significantly in the past decades and is now a major global environmental issue. Plastic objects enter the ocean and are broken down into smaller pieces, while wastewater and runoff also carry microplastics (plastics <5 mm) into the ocean. Plastic has been found in over 700 different species of marine wildlife but little research has examined fish sold for human consumption. We determined the microplastic abundance in nine commercially important, wild-caught fish species purchased from seafood markets across 4000 km of Australia (Western Australia, South Australia, Victoria, Tasmania, New South Wales). For microplastic quantification, fish gastro-intestinal tracts were chemically digested and the amount and type of microplastic identified under a microscope and Fourier transform infrared spectrometer. Across all states, an average of 35.5% of fish samples had at least one piece of microplastic in their gastro-intestinal tract. South Australia had the highest percentage of fish with plastic (49%) and Tasmania the lowest (20%). The average microplastic load was 0.94 piece per fish but ranged from 0 to 17 pieces, with polyolefin identified as the dominant polymer group. Overall, the ingestion of microplastic was widespread across species, locations, diets and habitat niches of fish species investigated, but the average plastic ingestion was less than other similar global studies. This study provides novel insights on the use of fish species from seafood markets to assess environmental contamination by microplastic, as well as an important perspective of the potential for microplastic contamination to enter the human food chain.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | microplastic, marine debris, ingestion, fish, seafood, Australia |
| Research Division: | Environmental Sciences |
| Research Group: | Pollution and contamination |
| Research Field: | Pollution and contamination not elsewhere classified |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - aquaculture |
| Objective Field: | Aquaculture oysters |
| UTAS Author: | Turnbull, A (Ms Alison Turnbull) |
| ID Code: | 146323 |
| Year Published: | 2021 |
| Web of Science® Times Cited: | 1 |
| Deposited By: | Sustainable Marine Research Collaboration |
| Deposited On: | 2021-08-30 |
| Last Modified: | 2021-09-01 |
| Downloads: | 0 |
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