title: Bioaccumulation of microcystins in two freshwater gastropods from a cyanobacteria-bloom plateau lake, Lake Dianchi.
abstract: To investigate the bioaccumulation patterns of microcystins (MCs) in organs of two gastropods, samples were collected in Lake Dianchi monthly from May to October, 2008, when cyanobacteria typically bloom. The average MCs concentrations for Radix swinhoei (pulmonate) and Margarya melanioides (prosobranch) tended to be similar for the different organs: the highest values in the hepatopancreas (9.33 by 3.74 μg/g DW), followed by digestive tracts (1.66 by 3.03 μg/g DW), gonads (0.45 by 1.34 μg/g DW) and muscles (0.22 by 0.40 μg/g DW). Pulmonate had higher value than prosobranch because of the stronger bioaccumulation ability in hepatopancreas. The levels in organs of R. swinhoei were correlated with environmentally dissolved MCs, but influenced by intracellular MCs for M. melanioides. The estimated MCs concentrations in edible parts of M. melanioides were beyond the WHO's provisional tolerable daily intake (0.04 μg/kg), suggesting the risk of consumption of M. melanioides from the lake.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.
authors.forename: Junqian
authors.initials: J
authors.lastname: Zhang
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
authors.forename: Zhuoyan
authors.initials: Z
authors.lastname: Song
authors.forename: Zhicai
authors.initials: Z
authors.lastname: Xie
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.forename: Lirong
authors.initials: L
authors.lastname: Song
mesh_terms: D000818:Animals; D002681:China; D000458:Cyanobacteria / Q000254:growth & development*; D004784:Environmental Monitoring; D005068:Eutrophication; D049851:Gastropoda / Q000378:metabolism*; D060106:Lakes / Q000737:chemistry* / Q000382:microbiology; D052998:Microcystins / Q000032:analysis / Q000378:metabolism*; D014873:Water Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D052998:Microcystins; D014873:Water Pollutants