4.7 Article

Microplastic contamination in marine-cultured fish from the Pearl River Estuary, South China

期刊

SCIENCE OF THE TOTAL ENVIRONMENT
卷 827, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.scitotenv.2022.154281

关键词

Microplastic ingestion; Mariculture; Farmed fish; Hybrid grouper; Pearl River Estuary

资金

  1. Research Grant Council, Hong Kong SAR Government (General Research Fund) [18300618]
  2. National Nature Science Foundation of China [41876129]
  3. Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering, Guangdong Laboratory (Guangzhou) [GML2019ZD0404]

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This study examined the abundance of microplastics in the stomach and intestine of marine-cultured hybrid groupers in the Pearl River Estuary. Microplastics were found in all fish samples, with a higher concentration in the intestine than in the stomach, and predominantly in the form of fiber-shaped particles.
Microplastics are ubiquitous in the aquatic environment. However, the occurrence of microplastics in farmed fish is under-researched. Herein, microplastic abundance in the stomach and intestine of marine-cultured hybrid groupers (Epinephelus fuscoguttatus x Epinephelus lanceolatus) in the Pearl River Estuary (PRE) was examined. Microplastics were detected in all fish samples, with an average abundance of 35.36 n/individual or 0.62 n/g. The fish intestine contained more microplastics (23.91 n/individual, i.e., 1.10 n/g) than the stomach (12.80 n/individual, i.e., 0.37 n/g). In addition, the ingested microplastics were predominantly fibre-shaped (70.1%), and nearly 70% were smaller than 1 mm in diameter. Potential factors affecting the ingestion of microplastics by farmed hybrid groupers include fish diet and the availability of microplastics in their feeding habitat.

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