Metals in the water, sediment, and tissues of two fish species from different trophic levels in a subtropical Brazilian river

Metals in the water, sediment, and tissues of two fish species from different trophic levels in a subtropical Brazilian river

In aquatic environments, heavy metals are produced from natural and anthropogenic sources and the degree of contamination in fish tissues depend on the pollutant type, fish species, sampling site, trophic level, and their mode of feeding. The heavy metal concentration (Al, As, Cd, Co, Cr, Cu, Fe, Mn...

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Bibliographic Details
Published in:Microchemical journal Vol. 106; pp. 61 - 66
Main Authors: Weber, Paula, Behr, Everton Rodolfo, Knorr, Camila De Lellis, Vendruscolo, Daniel Secretti, Flores, Erico M.M., Dressler, Valderi L., Baldisserotto, Bernardo
Format: Journal Article
Language:English
Published: Elsevier B.V 01-01-2013
Subjects:
Carnivore
Detritivore
Ecological risk
Liver
Sediment
Sinos River
Ecological risk
Sediment
Detritivore
Sinos River
Liver
Carnivore
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Summary:In aquatic environments, heavy metals are produced from natural and anthropogenic sources and the degree of contamination in fish tissues depend on the pollutant type, fish species, sampling site, trophic level, and their mode of feeding. The heavy metal concentration (Al, As, Cd, Co, Cr, Cu, Fe, Mn, Zn, and Pb) in the water, sediment, and liver of two fish species (Oligosarcus spp. – carnivore and Chyphocarax voga – detritivore) was analyzed at two sampling sites in the Sinos River, Brazil, during the four seasons. The highest heavy metals concentration was observed in the sediment, followed by water, and the lowest in fish. As the sediment was the major sink for pollution by metals in this river, it probably played an important role in the uptake of these metals by the detritivore species, which accumulated more metals in the liver than the carnivore species. Furthermore, the potential ecological risk was low for both sampling sites, showing the low metal contamination in this area. ► We analyzed two sampling sites with different pollution degree in the same River. ► For both sites, metal concentration was highest in the sediment, middle in water, and lower in the fish liver. ► The detritivore species presented the highest concentration for all analyzed metals. ► Potential ecological risk for single regulator indexes showed low potential ecological risk for all analyzed metals except Cd.
ISSN:0026-265X
1095-9149
DOI:10.1016/j.microc.2012.05.004