The influence of mariculture on mercury distribution in sediments and fish around Hong Kong and adjacent mainland China waters
| Autor: | Jianbo Shi, Wen-Xiong Wang, Samuel Chun-Lap Lo, Dingding Shao, Ming Hung Wong, Shengchun Wu, Fuyong Wu, Xiao-Lin Sun, Peng Liang |
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| Rok vydání: | 2011 |
| Předmět: |
China
Geologic Sediments Environmental Engineering Nitrogen Oceans and Seas Health Toxicology and Mutagenesis Lutjanus campechanus chemistry.chemical_element Aquaculture Risk Assessment Commercial fish feed chemistry.chemical_compound food Animals Humans Environmental Chemistry Mariculture Organic matter Methylmercury chemistry.chemical_classification biology Chemistry Muscles Public Health Environmental and Occupational Health Environmental Exposure Mercury General Medicine General Chemistry Epinephelus biology.organism_classification Pollution Carbon food.food Diet Perciformes Mercury (element) Fishery Seafood Environmental chemistry Pompano Female Sulfur Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Chemosphere. 82:1038-1043 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2010.10.061 |
| Popis: | To study the influence of mariculture on mercury (Hg) speciation and distribution in sediments and cultured fish around Hong Kong and adjacent mainland China waters, sediment samples were collected from six mariculture sites and the corresponding reference sites, 200-300 m away from the mariculture sites. Mariculture activities increased total mercury, organic matter, carbon, nitrogen and sulfur concentrations in the surface sediments underneath mariculture sites, possibly due to the accumulation of unconsumed fish feed and fish excretion. However, methylmercury (MeHg) concentrations and the ratio of MeHg to THg (% MeHg) in sediments underneath mariculture sites were lower than the corresponding reference sites. The % MeHg in sediments was negatively correlated (r = -0.579, p < 0.05) with organic matter (OM) content among all sites, indicating that OM may have inhibited Hg methylation in surface sediments. Three mariculture fish species were collected from each mariculture site, including red snapper (Lutjanus campechanus), orange-spotted grouper (Epinephelus coioides) and snubnose pompano (Trachinotus blochii). The average MeHg concentration in fish muscle was 75 mu g kg(-1) (wet weight), and the dietary intake of MeHg through fish consumption for Hong Kong residents was 0.37 mu g kg(-1) week(-1), which was lower than the corresponding WHO limits (500 mu g kg(-1) and 1.6 mu g kg(-1) week(-1)). (C) 2010 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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