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Microplastics in different tissues of caught fish in the artificial reef area and adjacent waters of Haizhou Bay
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Microplastics were ubiquitously detected in both gills and gut tissues of fish from the artificial reef area of Haizhou Bay and adjacent waters, with tissue-specific accumulation patterns and polymer types indicating that fish in artificial reef habitats are exposed to similar microplastic contamination as fish in natural habitats.
In recent years, the microplastics (MPs) pollution in the offshore of microplastics has gradually become a concerning topic, and the understanding the accumulation of MPs in different tissues of organisms is also an important aspect. MPs can easily affect target tissues and transport related chemicals to humans through the food chain. MPs in the gills and guts of fish in the artificial reef area of Haizhou Bay and adjacent waters were detected in this study. The results showed that MPs were ubiquitous in the gills and guts of 26 species, with average quantities of 3.54 ± 2.14 pieces/fish and 3.00 ± 2.63 pieces/fish, respectively. More than 99% of the plastics were MPs that were less than 5 mm in diameter, with blue fiber being the most common. The number and quantity of MPs in gills were higher than those in guts in different habitat types, living water layers and feeding habits of fish. At the community level, as the body length and body weight increased, the quantity of MPs in the gills and guts showed a slight decreasing trend, and the correlation was not strong (P > 0.05). With increasing trophic levels (TLs), MPs were biomagnified in the guts (Trophic magnification factor, TMF = 1.37), but no change occurred in the gills (TMF = 1.00). We believe that biomagnification of MPs should be obtained by comparing the quantity of MPs in whole organisms rather than only in specific tissues before such conclusions can be defined. We recommend that periodic marine monitoring programs be implemented, as well as research into smaller MPs and even nanoplastics, to assess from the perspective of water, sediments, organisms and ecotoxicology, which will provide useful information for MPs pollution in artificial reefs and help to improve the MPs pollution database in China.
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Researchers measured microplastic abundance and distribution in seawater and bottom sediments across aquaculture, artificial reef, and adjacent areas of Haizhou Bay, China, finding that mean abundances in seawater were 7-10 particles per cubic meter and varied with water depth. Microplastic distribution was influenced by hydrodynamic conditions and the proximity to aquaculture and reef structures.
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Researchers examined microplastic ingestion by fish in Haizhou Bay's artificial reef area, finding evidence of trophic transfer where predatory species accumulated more microplastics than lower trophic level species in the food web.
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Microplastics were detected in water, sediment, and fish from artificial reef structures in the Ma'an Archipelago, China, demonstrating that even managed marine habitat enhancement areas are contaminated with plastic particles. The findings suggest that microplastic monitoring should be incorporated into artificial reef management and ecological assessments.
Microplastic Ingestion by Fish with Different Feeding Habits from Different Habitats in a Typical Semi-Enclosed Haizhou Bay
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A study of eight fish species in China's Haizhou Bay found microplastic detection rates of 53–80% across species, with benthic and omnivorous fish accumulating significantly more MPs than pelagic or predatory fish, and PET, polyamide, and polystyrene linked to marine aquaculture and port construction. Feeding behavior and habitat depth are key determinants of MP accumulation, with bottom-dwelling fish consuming prey that carries greater plastic loads from contaminated sediment layers.
The accumulation of microplastics in fish from an important fish farm and mariculture area, Haizhou Bay, China
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Researchers investigated microplastic accumulation in six wild fish species from Haizhou Bay, a major fish farm and mariculture area in China, examining both digestive and non-digestive tissues. They found microplastics present in all fish species, with variation in abundance depending on species and tissue type. The findings raise concerns about microplastic transfer through aquaculture supply chains and potential implications for seafood safety.
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