| Mercury and stable isotope signatures in caged marine fish and fish feeds. | |
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MedLine Citation:
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PMID: 22195524 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Total mercury (THg) and methylmercury (MeHg) concentrations were determined in four species of marine caged carnivorous fish, one species of herbivorous fish and three types of fish feeds (dried pellet feed, forage fish and fish viscera), collected from five cage sites in the rural areas along Fujian coastline, China. For the carnivorous fish, the concentrations of THg and MeHg ranged from 0.03 to 0.31μg/g and from 0.02 to 0.30μg/g on wet weight basis, respectively. The concentrations were lower for the herbivorous fish with both within the range of 0.01-0.03μg/g. Out of the three tested fish feeds, tuna viscera contained the highest level of mercury (0.20μg/g THg and 0.13μg/g MeHg), with pellet feed containing the lowest level (0.05μg/g THg and 0.01μg/g MeHg). The calculated trophic transfer factor of MeHg was the highest (12-64) for fish fed on pellet feeds, and was the lowest for fish fed on tuna viscera. A significant relationship was found between Hg concentrations in caged fish and in fish feeds, thus Hg was primarily accumulated from the diet. Furthermore, the stable isotope δ(15)N was positively correlated with the Hg concentration in two caged sites, indicating that δ(15)N may be a suitable tool for tracking mercury in caged fish. We conclude that fish farming may be a good way of reducing the human exposure to Hg because mercury levels can be carefully controlled in such farming systems. |
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Authors:
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Sarayut Onsanit; Min Chen; Caihuan Ke; Wen-Xiong Wang |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-26 |
Journal Detail:
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Title: Journal of hazardous materials Volume: - ISSN: 1873-3336 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-12-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
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State Key Laboratory for Marine Environmental Science, College of Oceanography and Environmental Science, Xiamen University, Xiamen 361005, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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