Environmental mercury concentrations in cultured low-trophic-level fish using food waste-based diets

文献类型： 外文期刊

第一作者： Cheng, Zhang

作者： Cheng, Zhang;Wong, Ming Hung;Cheng, Zhang;Man, Yu Bon;Wong, Ming Hung;Man, Yu Bon;Wong, Ming Hung;Cheng, Zhang;Mo, Wing Yin;Man, Yu Bon;Lam, Cheung Lung;Choi, Wai Ming;Wong, Ming Hung;Nie, Xiang Ping;Liu, Yi Hui

作者机构：

关键词： Food waste;China;Bioaccumulation;Total mercury;Methylmercury

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： In this study, different types of food wastes were used as the major source of protein to replace the fish meal in fish feeds to produce quality fish (polyculture of different freshwater fish). During October 2011-April 2012, the concentrations of Hg in water, suspended particulate matter, and sediment of the three experimental fish ponds located in Sha Tau Kok Organic Farm were monitored, and the results were similar to or lower than those detected in commercial fish ponds around the Pearl River Delta (PRD) region (by comparing data of previous and present studies). Health risk assessments indicated that human consumption of grass carp (Ctenopharyngodon idellus), a herbivore which fed food waste feed pellets would be safer than other fish species: mud carp (Cirrhina molitorella), bighead carp (Hypophthalmichthys nobilis), and largemouth bass (Lepomis macrochirus). Due to the lower species diversity and substantially shorter food chains of the polyculture system consisting of only three fish species, the extent of Hg biomagnification was significantly lower than other polyculture ponds around PRD. Furthermore, the use of food waste instead of fish meal (mainly consisted of contaminated trash fish) further reduced the mercury accumulation in the cultured fish.

分类号： X5`X

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