Kinetics of mercury accumulation and elimination in edible glass eel (Anguilla anguilla) and potential health public risks

Mercury (Hg) bioaccumulation and depuration potential was assessed in the glass eel Anguilla anguilla over a 30-day period, through a mesocosm experiment. During exposure period, glass eels exhibited a significant increase in Hg concentration compared with the control ones, revealing great accumulat...

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Bibliographic Details
Published in:Water, Air, & Soil Pollution
Main Authors: Grilo, T. F., Mendes, T., Coelho, J. P., Pereira, E., Pardal, M. A., Cardoso, P. G.
Format: Article in Journal/Newspaper
Language:English
Published: Springer 2015
Subjects:
Glass eel
Mercury
Bioaccumulation
Depuration
Food safety
Human health
Anguilla anguilla
Online Access:http://hdl.handle.net/10773/17051
https://doi.org/10.1007/s11270-015-2431-5
Description
Summary:Mercury (Hg) bioaccumulation and depuration potential was assessed in the glass eel Anguilla anguilla over a 30-day period, through a mesocosm experiment. During exposure period, glass eels exhibited a significant increase in Hg concentration compared with the control ones, revealing great accumulation capability. Distinct bioaccumulation kinetics were observed depending on the exposure concentrations: a saturation model and a linear accumulation model were achieved for low and high Hg levels, respectively. After 72 h of depuration, glass eels lost around 2 and 10 % of the Hg previously accumulated; however, until the end of the experiment, they never reached the original baseline condition. Most importantly, organisms exposed to high Hg concentrations still retained contaminant levels exceeding the European threshold regulating human food consumption. This may raise serious health concerns, due to the species’ rising interest in the international cuisine.

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