Selenium and mercury in widely consumed seafood from South Atlantic Ocean

Kehrig, Helena A.; Seixas, Tércia G.; Beneditto, Ana Paula Madeira Di; Malm, Olaf

doi:10.1016/j.ecoenv.2013.03.034

Cited by 44 publications

(18 citation statements)

References 35 publications

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“…Greenland the ratio was 5.6±2.8 (mean±sd) (Basu et al 2009). Selenium has been associated with a decrease in neurotoxic effects of Hg exposure in rats (Ralston et al 2008) and a molar ratio of Se:Hg of >1 can protect from Hg-associated effects (Kehrig et al 2013, Zhang et al 2013). The great molar excess of Se over Hg in these ringed seal brains could reduce or modulate the neurotoxic effects o f Hg.…”

Section: Selenium :Mercury Molar Ratiomentioning

confidence: 98%

“…In wildlife, Se and Hg levels correlated positively in polar bear cerebellum. Ratios of Se:Hg >1 are assumed to counteract the adverse effects o f Hg, protecting against Hg toxicity (Kehrig et al 2013). In controlled feeding trials, the Se:Hg molar ratio was 83 in rats exposed to low equimolar amounts of Se and MeHg and 7 in rats exposed to two times more MeHg than Se (Brockman et al 2011).…”

Section: Mercury Detoxificationmentioning

confidence: 99%

“…In striped dolphins and captive bottlenose dolphins (Tursiops truncatus), the Se:Hg molar ratio in brain tissue was -1.85 and -2.96, respectively (Cardellicchio et al 2002, Hong et al 2012. The high molar excess of Se over Hg in the ringed seal brain could affect the neurotoxic effects of Hg, as a Se:Hg molar ratio of >1 has been suggested to protect from Hg intoxication (Kehrig et al 2013, Zhang et al 2013.…”

Section: Concentration O F Hg Se:hg Molar Ratio and Mehg Proportionmentioning

confidence: 99%

“…Selenium (Se) binds with Hg, altering its toxicity in mammals (Ganther et al 1972, Sakamoto et al 2013, Zhang et al 2013. Molar ratios o f Se-to-Hg (Se:Hg) >1 are assumed to protect against Hg toxicity (Kehrig et al 2013, Zhang et al 2013. In ringed seal brain, the Se:Hg molar ratio was >1, which could protect them from direct Hg neurotoxicity (Krey et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Mercury neurotoxicity have been shown to be modulated by selenium (Se) (Berry and Ralston 2008, Ganther et al 1972, Ralston et al 2008 and molar ratios of Se:Hg >1 are assumed to protect against Hg toxicity (Kehrig et al 2013, Zhang et al 2013. In ringed seals, the molar ratio of Se:Hg was reported to be >1 and could protect them from direct Hg neurotoxicity (Krey et al 2014).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Mercury in the brain of polar bears (Ursus maritimus ) and ringed seals (Pusa hispida).

Krey¹

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Section: Selenium :Mercury Molar Ratiomentioning

confidence: 98%

Section: Mercury Detoxificationmentioning

confidence: 99%

Section: Concentration O F Hg Se:hg Molar Ratio and Mehg Proportionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mercury in the brain of polar bears (Ursus maritimus ) and ringed seals (Pusa hispida).

Krey¹

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Fish and seafood

Marcovecchio

Marco

Buzzi

et al. 2015

Handbook of Mineral Elements in Food

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Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters

Houde

Taranu

Wang

et al. 2020

Enviro Toxic and Chemistry

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Mercury is found in Arctic marine mammals that are important in the diet of northern Indigenous peoples. The objectives of the present long-term study, spanning a 45-yr period, were to 1) investigate the temporal trends of total mercury (THg; muscle and liver) and selenium (Se; liver) in ringed seals (Pusa hispida) from different regions of the Canadian Arctic; and 2) examine possible relationships with age, diet, and climate parameters such as air temperature, precipitation, climatic indices, and ice-coverage. Ringed seals were collected by hunters in northern communities in the Beaufort Sea, Central Arctic, Eastern Baffin Island, Hudson Bay, and Ungava/Nunatsiavut regions (Canada) between 1972 and 2017. Mercury levels did not change through time in seal liver, but THg levels in muscle decreased in seals from Hudson Bay (−0.91%/yr) and Ungava/ Nunatsiavut (−1.30%/yr). Carbon stable isotope values in seal muscle decreased significantly through time in 4 regions. Selenium-to-THg ratios were found to be >1 for all years and regions. Variation partitioning analyses across regions indicated that THg trends in seals were mostly explained by age (7.3-21.7%), climate parameters (3.5-12.5%), and diet (up to 9%); climate indices (i.e., Arctic and North Atlantic Oscillations, Pacific/North American pattern) explained the majority of the climate portion. The THg levels had a positive relationship with Arctic Oscillation for multiple regions. Associations of THg with air temperature, total precipitation, and sea-ice coverage, as well as with North Atlantic Oscillation and Pacific/North American pattern were found to vary with tissue type and geographical area. Environ Toxicol Chem 2020;00:1-13. © 2020 Her Majesty the Queen in Right of Canada. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC. Reproduced with the permission of the Minister of Fisheries and Oceans Canada.

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Selenium and mercury in widely consumed seafood from South Atlantic Ocean

Cited by 44 publications

References 35 publications

Mercury in the brain of polar bears (Ursus maritimus ) and ringed seals (Pusa hispida).

Mercury in the brain of polar bears (Ursus maritimus ) and ringed seals (Pusa hispida).

Fish and seafood

Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters

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