Mercury and selenium in European catfish (Silurus glanis) from Northern Italian Rivers: Can molar ratio be a predictive factor for mercury toxicity in a top predator?

Squadrone, Stefania; Benedetto, Alessandro; Brizio, Paola; Prearo, Marino; Abete, Maria Cesarina

doi:10.1016/j.chemosphere.2014.05.052

Cited by 54 publications

(20 citation statements)

References 30 publications

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“…Mercury has the ability to accumulate in the tissues of fish usually in the form of methylmercury, a highly toxic form. Moreover the increasing of mercury levels that causes many diseases for human as Minamata disease which causes mental disturbance, loss of balance, speech, sight and hearing difficulty in swallowing and degeneration of brain (8,9,10) .…”

Section: Introductionmentioning

confidence: 99%

Assessing of Some Toxic Heavy Metals Levels and Using Geo Accumulation Index in Sediment of Shatt Al-Arab and the Iraqi Marine Region

al.¹

2019

Baghdad Sci.J

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Mercury, arsenic, cadmium and lead, were measured in sediment samples of river and marine environmental of Basra governorate in southern of Iraq. Sixteen sites of sediment were selected and distributed along Shatt Al-Arab River and the Iraqi marine environment. The samples were distributed among one station on Euphrates River before its confluence with Tigris River and Shatt Al-Arab formation, seven stations along Shatt Al-Arab River and eight stations were selected from the Iraqi marine region. All samples were collected from surface sediment in low tide time. ICP technique was used for the determination of mercury and arsenic for all samples, while cadmium and lead were measured for the same samples by using Atomic Absorption Spectroscopy. The results for all the measurements in Shatt Al-Arab sediment showed the values at extent: (0.0611-0.1233 µg/g), (0.5490-46.2052µg/g), (2.3356-4.7773 µg/g), (51.3309-107.0358 µg/g) for concentration of mercury, arsenic, cadmium and lead respectively.While the concentrations in marine sediment were recorded at range: arsenic (0.3510 - 46.0110 µg/g), cadmium (3.5136 - 5.5905 µg/g) and lead (43.68974-75.37045µg/g). The statistical analysis for all stations was studied by using the software SPSS v-20.0. It shows there are no significant differences in the concentrations between stations at P≥0.05 level and also the geo accumulation index was calculated for metals in all stations.

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Section: Introductionmentioning

confidence: 99%

Assessing of Some Toxic Heavy Metals Levels and Using Geo Accumulation Index in Sediment of Shatt Al-Arab and the Iraqi Marine Region

al.¹

2019

Baghdad Sci.J

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“…Furthermore, Se competes with Hg for its various biological targets, which also contributes to lowering the potential toxicity of Hg (Khan and Wang, 2009). Therefore, the Se/Hg molar ratio has been widely used (McHuron et al, 2014;Mendez-Fernandez et al, 2014;Squadrone et al, 2015;Vos et al, 2003), and many authors have established that Se, in a molar ratio of 1:1 or above with Hg, protects against the toxic effects of this metal (Ganther et al, 1972;Ralston and Raymond, 2013;Ralston et al, 2007;Ralston and Raymond, 2010;Sormo et al, 2011;Squadrone et al, 2015). However, paradoxically, this protective action can be harmful to the body because complex formation also results in the sequestration of both elements, causing them to become biologically unavailable (Martoja and Berry, 1980).…”

Section: Introductionmentioning

confidence: 99%

Mercury and selenium status of bottlenose dolphins ( Tursiops truncatus ): A study in stranded animals on the Canary Islands

García‐Álvarez

Fernández

Boada

et al. 2015

Science of The Total Environment

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“…14, 17 However, the majority of the studies addressing Se/Hg molar ratios have been ecological in nature, focusing on natural ratios present in fish. 52–54 In laboratory studies with rodents, both beneficial and nonadvantageous health outcomes of Se coexposure have been noted. 14, 55 Furthermore, although Se has a beneficial impact on some health outcomes, there has not been strong evidence for interactions between Hg and Se in epidemiological studies.…”

Section: Discussionmentioning

confidence: 99%

Antagonistic Growth Effects of Mercury and Selenium in Caenorhabditis elegans Are Chemical-Species-Dependent and Do Not Depend on Internal Hg/Se Ratios

Wyatt

Diringer

Rogers

et al. 2016

Environ. Sci. Technol.

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The relationship between mercury (Hg) and selenium (Se) toxicity is complex, with coexposure reported to reduce, increase, and have no effect on toxicity. Different interactions may be related to chemical compound, but this has not been systematically examined. Our goal was to assess the interactive effects between the two elements on growth in the nematode Caenorhabditis elegans, focusing on inorganic and organic Hg (HgCl2 and MeHgCl) and Se (selenomethionine, sodium selenite, and sodium selenate) compounds. We utilized aqueous Hg/Se dosing molar ratios that were either above, below, or equal to 1 and measured the internal nematode total Hg and Se concentrations for the highest concentrations of each Se compound. Observed interactions were complicated, differed between Se and Hg compounds, and included greater-than-additive, additive, and less-than-additive growth impacts. Biologically significant interactions were only observed when the dosing Se solution concentration was 100–25 000 times greater than the dosing Hg concentration. Mitigation of growth impacts was not predictable on the basis of internal Hg/Se molar ratio; improved growth was observed at some internal Hg/Se molar ratios both above and below 1. These findings suggest that future assessments of the Hg and Se relationship should incorporate chemical compound into the evaluation.

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Mercury and selenium in European catfish (Silurus glanis) from Northern Italian Rivers: Can molar ratio be a predictive factor for mercury toxicity in a top predator?

Cited by 54 publications

References 30 publications

Assessing of Some Toxic Heavy Metals Levels and Using Geo Accumulation Index in Sediment of Shatt Al-Arab and the Iraqi Marine Region

Assessing of Some Toxic Heavy Metals Levels and Using Geo Accumulation Index in Sediment of Shatt Al-Arab and the Iraqi Marine Region

Mercury and selenium status of bottlenose dolphins ( Tursiops truncatus ): A study in stranded animals on the Canary Islands

Antagonistic Growth Effects of Mercury and Selenium in Caenorhabditis elegans Are Chemical-Species-Dependent and Do Not Depend on Internal Hg/Se Ratios

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