Publication Type Journal Article
Title Assessment of the mercury-selenium antagonism in rainbow trout fish
Authors M. Ribeiro N. Zephyr J A L Silva M. Danion T. Guerin I Castanheira A. Leufroy P. Jitaru
Groups BIOIN
Journal CHEMOSPHERE
Year 2022
Month
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Volume 286
Number 2
Pages
Abstract This study aims at the assessment of mercury (Hg)-selenium (Se) antagonism in fish. For this purpose, rainbow trout fish (Oncorhynchus mykiss) were exposed to methylmercury (MeHg) under controlled conditions, in the presence or absence of selenomethionine (SeMet) using an in-house prepared diet (enriched with MeHg and SeMet at 0.2 mu g/g and 5.0 mu g/g, respectively). The total duration of the exposure study was 3 months. Fish was sampled and analysed for total Se (Se-T) and total mercury (Hg-T) content after 1, 2 and 3 months of exposure. Six feeding protocols were compared, depending on the exposure type: (i) no MeHg nor SeMet exposure (control group); (ii) exposure to SeMet solely; (iii) exposure to MeHg solely; (iv) exposure to both MeHg and SeMet; (v) exposure first to MeHg during 1 month and then to SeMet during 2 months and (vi), exposure to SeMet during 1 month and then to MeHg for 2 months. The levels of Se-T and Hg-T in the fish (control and supplemented with MeHg/SeMet) were measured by inductively coupled plasma-mass spectrometry (ICPMS). Steadily (linear) bioaccumulation of MeHg in the fish muscle occurred when the fish were exposed individually to this species during the period. The bioaccumulation of MeHg is diminished when the fish are firstly exposed to SeMet and then to MeHg, hence indicating the MeHg detoxification due to SeMet supplementation.
DOI http://dx.doi.org/10.1016/j.chemosphere.2021.131749
ISBN
Publisher
Book Title
ISSN 0045-6535
EISSN 1879-1298
Conference Name
Bibtex ID WOS:000703736400009
Observations
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