Organ distribution and bioaccumulation of microcystins in freshwater fish at different trophic levels from the eutrophic Lake Chaohu, China

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	Organ distribution and bioaccumulation of microcystins in freshwater fish at different trophic levels from the eutrophic Lake Chaohu, China
	Xie, LQ ; Xie, P ; Guo, LG ; Li, L ; Miyabara, Y ; Park, HD
	2005
会议名称	6th International Conference on Toxic Cyanobacteria
会议日期	JUN 21-27, 2004
会议地点	Bergen, NORWAY
关键词	microcystin fish bioaccumulation organ distribution food chain
页码	293-300
通讯作者	Xie, P, Shinshu Univ, Fac Sci, Dept Environm Sci, Matsumoto, Nagano 3908621, Japan
中文摘要	This article reports the organ distribution and bioaccumulation of hepatotoxic microcystins (MCs) in freshwater fishes at different trophic levels from the large, shallow, eutrophic Lake Chaohu in September 2003, when there were heavy surface blooms of toxic cyanobacteria. Among all fish, intestines and blood had the highest average content of MC-RR + MC-LR (22.0 and 14.5 mu g g(-1) DW, respectively), followed by liver, bile, and kidney (7.77, 6.32, and 5.81 mu g g(-1) DW, respectively), whereas muscle had the least (1.81 mu g g(-1) DW). MC content in muscle was highest in carnivorous fish (Culter ilishaeformis, 2.22 mu g g(-1) DW) and omnivorous fish (Carassius auratus, 1.96 mu g g(-1) DW) and was lowest in phytoplanktivorous fish (Hypophthalmichthys molitrix, 1.65 mu g g(-1) DW) and herbivorous fish (Parabramis pekinensis 0.660 mu g g(-1) DW). However, the amount of MC in the gut of H. molitrix (137 mu g g(-1) DW) was more than 20 times that in the other fish (< 6.50 mu g g(-1) DW). The MCs showed a tendency to accumulate up the food chain, and piscivorous fish at the top of the food chain were at high risk of exposure to MCs in Lake Chaohu. Our study is the first to report MC concentrations in the bile and blood of wild fish. One hundred grams of fish muscle would contain 2.64-49.7 mu g of MC-LR equivalent, or about 1.3-25 times the recommended tolerable daily intake of MC-LR by humans, indicating that fish are already severely contaminated by MCs and that the local authorities should warn the public of the risk of poisoning by eating the contaminated fish. (c) 2005 Wiley Periodicals, Inc.
收录类别	SCI
会议录	ENVIRONMENTAL TOXICOLOGY
语种	英语
WOS记录号	WOS:000229897500012
内容类型	会议论文
源URL	[http://ir.ihb.ac.cn/handle/342005/11791]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_会议论文
推荐引用方式 GB/T 7714	Xie, LQ,Xie, P,Guo, LG,et al. Organ distribution and bioaccumulation of microcystins in freshwater fish at different trophic levels from the eutrophic Lake Chaohu, China[C]. 见:6th International Conference on Toxic Cyanobacteria. Bergen, NORWAY. JUN 21-27, 2004.