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Article Tier 2 Environmental Sources Food & Water Gut & Microbiome Marine & Wildlife Sign in to save

Microplastic contamination caused by different rearing modes of Asian swamp eel ( Monopterus albus )

Aquaculture Research 2020 48 citations

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This study compared microplastic contamination in eels raised in four different aquaculture systems and found that recycled-water systems had the highest microplastic levels in eel tissues and wastewater. The farming method significantly affects how much microplastic contamination accumulates in farmed seafood, with implications for food safety standards in eel production.

Study Type Environmental

At present, research into the impact of microplastic contamination on environmental and food safety in the eel farming industry is insufficient. Here, we investigated the occurrence of microplastics in eels (Monopterus albus), wastewater and soils from recycled-water, cement-pool, net-cage and rice-field rearing systems. Results showed that average microplastic abundances were 2.4 ± 0.8 items/individual, 1.0 ± 0.4 items/L, 27.1 ± 7.0 items/kg in eels, water and soils, respectively. A significant increase in microplastic abundances occurred in all diet-fed eels (recycled-water, cement-pool and net-cage eels) from their pre-rearing to post-rearing stages. Moreover, cluster analysis indicated high similarities in composition of microplastics between fish diets and eels. However, no significant differences in microplastic abundances were observed among the four types of reared eels. Most of the microplastics were found in the foreguts of eels. In addition, wastewater microplastic increased significantly in the cement-pool, net-cage and rice-field farming during eel rearing. This study first revealed microplastic contamination and its characteristics in eels-rearing environments, which suggests the eco-environmental risk of microplastics in aquaculture.

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