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Impacts of tailings of Fundão dam (Brazil) rupture on marine fish: Metals bioaccumulation and physiological responses.

Authors :
Bevitório LZ
da Silva NG
Pirovani JCM
Marques JA
Vieira CED
Zebral YD
Damasceno EM
Lopes LLR
de Sant'Ana LP
Marube LC
da Costa SR
Martins CMG
Sandrini JZ
Souza MM
Bianchini A
do Vale-Oliveira M
Source :
Marine pollution bulletin [Mar Pollut Bull] 2022 Apr; Vol. 177, pp. 113511. Date of Electronic Publication: 2022 Mar 15.
Publication Year :
2022

Abstract

This study evaluated the impacts of the mining tailings after the rupture of the Fundão dam on fish communities on the Atlantic Ocean southeast coast. Four sample collections were carried out over two years (2018-2020), in seasonal periods. Omnivorous/herbivorous and carnivorous fish were collected for analysis of metal bioaccumulation, multibiomarkers of environmental contamination and histopathology. Metal bioaccumulation was stronger correlated in carnivorous fish in the dry-2018 collection, besides higher activity of antioxidant enzymes, energy metabolism and higher morphological damage; however, there was less oxidative damage and less metallothioneins induction, and these variables were strongly associated with the wet-2020 collection. In a temporal view, it was possible to observe a reduction in metal levels in fish, except in the mouth of the Doce River. These events can be explained by seasonal natural events, which tend the resuspension and boost metal levels, mainly in the mouth region during the rainy season.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-3363
Volume :
177
Database :
MEDLINE
Journal :
Marine pollution bulletin
Publication Type :
Academic Journal
Accession number :
35303634
Full Text :
https://doi.org/10.1016/j.marpolbul.2022.113511