Influence of the flood pulse on mercury accumulation in detritivorous, herbivorous and omnivorous fish in Brazilian Amazonia

Azevedo, Lucas Silva; Pestana, Inácio Abreu; Nery, Adriely Ferreira da Costa; Bastos, Wanderley Rodrigues; Souza, Cristina Maria Magalhães de

doi:10.1007/s10646-019-02044-y

Cited by 11 publications

(6 citation statements)

References 45 publications

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“…Additionally, studies evaluating fish in hydroelectric reservoirs and dam regions showed that Puruzinho and Catalão Lakes presented higher mercury concentrations of S. rhombeus (mean 0.789 μg/g, and range of 0.029 to 1.640 μg/g) [ 71 , 81 , 84 ]. On the other hand, the reservoirs of Belo Monte and Jirau Hydroelectric Plants showed high concentrations of mercury in S. rhombeus (0.480 μg/g) and lower concentrations in Triportheus albus (0.132 μg/g) [ 90 , 94 ].…”

Section: Resultsmentioning

confidence: 99%

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Martoredjo,

Calvão Santos,

Vilhena

et al. 2024

Toxics

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Mercury contamination in the Amazon arising from both natural sources and intensive mining activities in the region is a significant public health concern. This metal is used to separate Au from sediments. Accordingly, this study aimed to assess the impact of mining on mercury contamination in the animal and human populations of the Amazon. This overall objective was pursued through a systematic review of the existing literature to assess the impact of Hg and identify gaps in geographic coverage arising from this assessment. Herein, we employed PECO and PRISMA-ScR protocols to select articles published between 2017 and 2023 based on projected points on a map within the biogeographic boundaries of the Amazon. We found that mercury concentrations increase with trophic levels, reaching high values of 3.7 µg/g in the muscles of predatory fish and 34.9 µg/g in human hair. The mean level of mercury in human hair in the whole (Amazon) region exceeds 6 µg/g, surpassing tolerance levels. Although mining regions show high concentrations of Hg, the highest incidence was observed among populations with fish-based diets. It was concluded that continuous research and monitoring of fish in the region are required in order to accurately assess the risk associated with Hg contamination, especially since fish are the main source of protein in this region.

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Section: Resultsmentioning

confidence: 99%

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Martoredjo,

Calvão Santos,

Vilhena

et al. 2024

Toxics

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“…However, studies considering other regions of the Amazon basin have shown that many fish species, including those that are known prey of Amazon river dolphin, 37 present high concentrations of heavy metals bioaccumulated in their tissues (e.g., cadmium, chromium, copper, lead, zinc, and mercury), both in areas with high mining activities (e.g., Madeira, Tapaj os, and Cassiporé Rivers) and in areas with low mining activities (e.g., Negro River). [43][44][45][46][47][48][49][50][51][52][53] Some studies reported that fish from floodplain lakes have high levels of Na, K, Cl, Ca, and Mg in their blood plasma and tissues (muscle, gills, and liver). 50,54 Some species and genera analyzed by Cruz et al 50 and Machado and Duncan 54 (e.g., Pinirampus pirinampu, Mylossoma duriventre, Sorubim lima, Astronotus ocellatus, Brachyplatystoma filamentosum, Cichla spp., and Colossoma spp.)…”

Section: Resultsmentioning

confidence: 99%

“…The analysis of prey tissue can be a powerful tool to assess the health risks for cetaceans when they are subjected to chemical exposure, according to Lin et al 42 Studies on contamination by heavy metals in fish from the MSDR region have not been performed to date. However, studies considering other regions of the Amazon basin have shown that many fish species, including those that are known prey of Amazon river dolphin, 37 present high concentrations of heavy metals bioaccumulated in their tissues (e.g., cadmium, chromium, copper, lead, zinc, and mercury), both in areas with high mining activities (e.g., Madeira, Tapajós, and Cassiporé Rivers) and in areas with low mining activities (e.g., Negro River) 43–53 …”

Section: Resultsmentioning

confidence: 99%

Detection and quantification of heavy metals in blood and milk of Amazon river dolphin (Inia geoffrensis) (Cetartiodactyla: Iniidae) using wavelength‐dispersive X‐ray fluorescence spectrometry

et al. 2023

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River dolphins of the genus Inia are among the most endangered cetacean species in the world. However, information on the elemental constitution of the blood and milk of these species is still quite scarce. This study aims to evaluate the wavelength‐dispersive X‐ray fluorescence (WD‐XRF) spectrometry to detect and quantify heavy metals in blood and milk samples of a free‐ranging female Amazon river dolphin (Inia geoffrensis) from Central Amazon, Brazil. The WD‐XRF method detected and quantified 14 elements (Na, Mg, Al, Si, P, S, Cl, K, Ca, Cr, Mn, Fe, Zn, and Cu) in the samples analyzed, in which 13 elements were in the blood and 14 were in the milk. The WD‐XRF method did not detect some heavy metals, including those already described for the Amazon river dolphin milk (e.g., mercury) detected by other analytical methods, such as atomic absorption spectrometry (AAS). However, it is possible that the samples analyzed may come from a non‐contaminated individual. Therefore, the joint use of different analytical methods is recommended for future analyses. In addition, both blood and milk samples presented high concentrations of some metals, and the health risks of botos are discussed. This result demonstrates that the WD‐XRF method is a viable analytical procedure for detecting certain elements and quantifying their concentrations in liquid biological samples of Amazonian cetaceans.

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“…Reference source not found.). Additionally, studies evaluating fish in hydroelectric reservoirs and dam regions showed that Puruzinho and Catalão Lakes presented higher mercury concentrations of S. rhombeus (mean 0.789 µg/g, and range of 0.029 to 1.640 µg/g) [73,83,86]. On the other hand, the reservoirs of Belo Monte and Jirau Hydroelectric Plants showed high concentrations of mercury in S. rhombeus (0.480 µg/g) and lower concentrations in Triportheus albus (0.132 µg/g) [92,96].…”

Section: Overview Of Thg Levels In Human Researchmentioning

confidence: 99%

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon

Martoredjo,

Calvão Santos,

Vilhena

et al. 2024

Preprint

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Mercury contamination in the Amazon is a significant public health concern arising from both natural sources and intensive mining activities in the region. This metal is used to separate Au from sediments, forming an amalgam that facilitates the extraction of precious metals. Accordingly, this study aimed to address the following question: What is the impact of mining on mercury contamination in the animal and human populations of the Amazon? The overall objective of this study was to conduct a systematic review of the existing literature to identify gaps in geographic coverage and assess the impact of Hg contamination on human and animal populations in the Amazon region. Our hypothesis was that higher mercury concentrations in tissue samples would be found closer to the mining areas. We employed the PECO and PRISMA-ScR protocols to collect articles published between 2017 and 2023, selected based on criteria representing projected points on a map within the biogeographic boundaries of the Amazon. Mercury concentrations increase with trophic levels, reaching high values of 3.7 µg/g in the muscles of predatory fish and 34.9 µg/g in human hair. The average level of mercury in humans exceeds 6 µg/g, surpassing tolerance levels. Although mining regions show high concentrations of Hg, the highest incidence was observed among populations with fish-based diets. Research on fish is crucial for assessing the risk to human health, given that fish are the main source of protein in the region.

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Influence of the flood pulse on mercury accumulation in detritivorous, herbivorous and omnivorous fish in Brazilian Amazonia

Cited by 11 publications

References 45 publications

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Detection and quantification of heavy metals in blood and milk of Amazon river dolphin (Inia geoffrensis) (Cetartiodactyla: Iniidae) using wavelength‐dispersive X‐ray fluorescence spectrometry

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon

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