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Impact of intensive mariculture activities on microplastic pollution in a typical semi-enclosed bay: Zhanjiang Bay
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Microplastic pollution in Zhanjiang Bay, a semi-enclosed bay in southern China with intensive mariculture, was monitored across seasons, finding that aquaculture activities were associated with elevated plastic concentrations and seasonal fluctuations linked to farming operations. The study identifies mariculture infrastructure and practices as significant contributors to localized coastal microplastic pollution.
Microplastic (MP) was investigated in Zhanjiang Bay, a semi-enclosed bay in south China and famous for considerable mariculture industry, to evaluate whether mariculture activities accelerated MP pollution. The MP abundances ranged from 0 to 2.65 n/m (number/m), showing seasonal variances with higher levels in May and September and lower levels in January. In the inner part of the bay, a significantly high MP abundance and predominance of foam were found during the oyster breeding period, and pollution sources were prone to be single and extensive. This suggested that MPs were strongly influenced by the intensive plastic products for oyster culturing, especially during breeding. Moreover, plastic cages used for culturing were the main source of MPs in the central part of the bay. By conducting statistical analysis for eight representative bays, the economic growth, social development, agriculture structure, and aquaculture development were supposed to influence the local MP pollution level.
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Researchers assessed microplastic pollution across water, sediment, and marine organisms in Xiangshan Bay, a major mariculture area in China, finding that intensive aquaculture in the enclosed inner bay concentrated microplastics and that fish ingested more particles than other organisms.
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Microplastics were found in water, sediment, and organisms throughout a major Chinese mariculture bay, with aquaculture gear — including nets, buoys, and cages — identified as a significant local source. The study highlights how the aquaculture industry contributes to coastal microplastic pollution through the degradation of plastic farming equipment.
Assessment of mariculture-derived microplastic pollution in Dapeng Cove, China
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A survey of a mariculture (marine fish farming) bay in Guangdong, China found moderate but widespread microplastic contamination in both surface water and bottom sediments, with fibers and polyethylene/polypropylene particles dominant. The authors link the pollution directly to long-term aquaculture activity and the plastic equipment it uses, such as nets, ropes, and floats. The study calls for tighter regulation of plastic gear in fish farming and serves as an important baseline dataset for one of China's busiest coastal aquaculture zones.
A comprehensive evaluation of microplastic pollution in the Xiangshan Bay of China with special reference to seasonal variation
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Researchers surveyed microplastic pollution in the semi-enclosed Xiangshan Bay in China across spring and summer seasons. The study found that microplastic abundance in surface water was significantly higher in summer than spring, with different pollution sources dominating each season — textile industry in spring and fishery production in summer — suggesting seasonal human activities strongly influence microplastic contamination patterns.
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