Baseline Concentrations of Total Mercury and Methylmercury in Salmon Returning Via the Bering Sea (1999–2000)

Zhang, Xiaoming; Naidu, A. Sathy; Kelley, John J.; Jewett, Stephen C.; Dasher, Doug; Duffy, Lawrence K.

doi:10.1016/s0025-326x(01)00200-4

Cited by 40 publications

(42 citation statements)

References 17 publications

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“…Mercury in muscle tissue was found essentially in the form of organic mercury, as methylmercury, in accordance with previously reported values for carnivorous and piscivorous fish (Andersen and Depledge 1997;Joiris et al 1999;Capelli et al 2000;Mason et al 2000;Kehrig et al 2001;2004;Zhang et al 2001). According to Watras et al (1998), methylmercury concentrations at higher trophic levels reflect an uptake from low trophic levels; among others, involving such factors as diet and growth.…”

Section: Mercury Methylmercurysupporting

confidence: 91%

“…The relatively low fraction of MeHg in the liver of all fish species found in this study, and in previous studies (Joiris et al 1999;Mason et al 2000;Zhang et al 2001;Kehrig et al 2004;Baêta et al 2006) indicates that MeHg in the liver is generally not much higher than in muscle tissue. In our study, it was observed mainly in the tissues of the omnivorous and benthonic carnivorous fish.…”

Section: Mercury Methylmercurysupporting

confidence: 72%

“…However, the major part of mercury accumulated in their internal organs, especially the liver, is inorganic mercury, suggesting that demethylation is possible (Joiris et al 1999;Zhang et al 2001;Kehrig et al 2004). Mercury, which accumulates during growth, is exogenous and harmful.…”

mentioning

confidence: 99%

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The relationships between mercury and selenium in plankton and fish from a tropical food web

Kehrig

Seixas

Palermo

et al. 2008

Environ Sci Pollut Res

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There is a need to assess the role of selenium in mercury accumulation in tropical ecosystems. Without further studies of the speciation of selenium in livers of fishes from this region, the precise role of this element, if any, cannot be verified in positively affecting mercury accumulation. Further studies of this element in the study of marine species should include liver samples containing relatively high concentrations of mercury. A basin-wide survey of selenium in fishes is also recommended.

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Section: Mercury Methylmercurysupporting

confidence: 91%

Section: Mercury Methylmercurysupporting

confidence: 72%

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The relationships between mercury and selenium in plankton and fish from a tropical food web

Kehrig

Seixas

Palermo

et al. 2008

Environ Sci Pollut Res

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“…These same authors analyzed Hg in pink and red canned salmon, which showed levels of 0.022e0.079 and 0.015e0.067 mg kg À1 , respectively. Such values are lower than those obtained in a study conducted by Zhang et al (2001), which have observed Hg values varying from 0.025 to 0.137 mg kg À1 for salmon. Both trials obtained higher levels than in the present study, which has levels from 0.01 to 0.02 mg kg À1 .…”

Section: Mercurycontrasting

confidence: 79%

Assessment of trace elements in fishes of Japanese foods marketed in São Paulo (Brazil)

et al. 2011

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a b s t r a c tIn recent years, there has been increasing fish consumption in Brazil, largely due to the popularity of Japanese cuisine. No study, however, has previously assessed the presence of inorganic contaminants in species used in the preparation of Japanese food. In this paper, we determined total arsenic, cadmium, chromium, total mercury, and lead contents in 82 fish samples of Tuna (Thunnus thynnus), Porgy (Pagrus pagrus), Snook (Centropomus sp.), and Salmon (Salmo salar) species marketed in São Paulo (Brazil). Samples were mineralized in HNO 3 /H 2 O 2 for As, Cd, Cr and Pb, and in HNO 3 /H 2 SO 4 /V 2 O 5 for Hg. Inorganic contaminants were determined after the validation of the methodology using Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES); and for Hg, an ICP-coupled hydride generator was used. Concentration ranges for elements analyzed in mg kg À1 (wet base) were as follows: Total As (0.11e10.82); Cd (0.005e0.047); Cr (0.008e0.259); Pb (0.026e0.481); and total Hg (0.0077e0.9681). As and Cr levels exceeded the maximum limits allowed by the Brazilian law (1 and 0.1 mg kg À1 ) in 51.2 and 7.3% of the total samples studied, respectively. The most contaminated species were porgy (As ¼ 95% and Cr ¼ 10%) and tuna (As 91% and Cr ¼ 10%). An estimation of As, Cd, Pb, and Hg weekly intake was calculated considering a 60 kg adult person and a 350 g consumption of fish per week, with As and Hg elements presenting the highest contribution on diets reaching 222% of provisional tolerable weekly intake (PTWI) for As in porgy and 41% of PTWI for Hg in tuna.

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“…For example, Zhang et al (2001) estimated that sockeye salmon annually transported ∼1 kg of monomethyl mercury (MeHg) from the Pacific Ocean to rivers in Bristol Bay, Alaska. This mass would be approximately equivalent to MeHg held in the top 500 m of the North Pacific Ocean over an area of ∼50 km 2 (based on MeHg measurements by Sunderland et al, 2007).…”

Section: Transport Of Contaminants By Biota (Biovectors)mentioning

confidence: 99%

The role of the global cryosphere in the fate of organic contaminants

et al. 2013

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Abstract. The cryosphere is an important component of global organic contaminant cycles. Snow is an efficient scavenger of atmospheric organic pollutants while a seasonal snowpack, sea ice, glaciers and ice caps are contaminant reservoirs on time scales ranging from days to millennia. Important physical and chemical processes occurring in the various cryospheric compartments impact contaminant cycling and fate. A variety of interactions and feedbacks also occur within the cryospheric system, most of which are susceptible to perturbations due to climate change. In this article, we review the current state of knowledge regarding the transport and processing of organic contaminants in the global cryosphere with an emphasis on the role of a changing climate. Given the complexity of contaminant interactions with the cryosphere and limitations on resources and research capacity, interdisciplinary research and extended collaborations are essential to close identified knowledge gaps and to improve our understanding of contaminant fate under a changing climate.

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Baseline Concentrations of Total Mercury and Methylmercury in Salmon Returning Via the Bering Sea (1999–2000)

Cited by 40 publications

References 17 publications

The relationships between mercury and selenium in plankton and fish from a tropical food web

The relationships between mercury and selenium in plankton and fish from a tropical food web

Assessment of trace elements in fishes of Japanese foods marketed in São Paulo (Brazil)

The role of the global cryosphere in the fate of organic contaminants

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