Total mercury in fishes and selected biota in lahontan reservoir, Nevada: 1981

Cooper, James J.

doi:10.1007/bf01608759

Cited by 19 publications

(9 citation statements)

References 9 publications

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“…In San Francisco Bay in the late 1990s levels ranged from 0.15 to 0.44 μg/g (Fairey et al, 1997), and later values from Lake Mead averaged 0.3 μg/g (Cizdziel et al, 2003). In Nevada reservoirs, mercury levels averaged as high as 0.95 μg/g (Cooper, 1983), while in Nova Scotia, mercury levels in striped bass muscle averaged 0.77 μg/g, with smaller fish averaging 0.51 μg/g (Ray et al, 1984). These data demonstrate variation in mercury levels in striped bass, but also suggest that (1) it is difficult to compare levels from different places without knowing the dates of collection and size of fish; (2) levels in bass within a state can vary, and, (3) site specific data (as well as year specific data) are required to examine long-term trends in a given region.…”

Section: Discussionmentioning

confidence: 99%

Seasonal, locational and size variations in mercury and selenium levels in striped bass (Morone saxatilis) from New Jersey

Gochfeld

Burger

Jeitner

et al. 2012

Environmental Research

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We examined total mercury and selenium levels in muscle of striped bass (Morone saxatilis) collected from 2005 to 2008 from coastal New Jersey. Of primary interest was whether there were differences in mercury and selenium levels as a function of size and location, and whether the legal size limits increased the exposure of bass consumers to mercury. We obtained samples mainly from recreational anglers, but also by seine and trawl. For the entire sample (n = 178 individual fish), the mean (± standard error) for total mercury was 0.39 ± 0.02 μg/g (= 0.39 ppm, wet weight basis) with a maximum of 1.3 μg/g (= 1.3 ppm wet weight). Mean selenium level was 0.30 ± 0.01 μg/g (w/w) with a maximum of 0.9 μg/g). Angler-caught fish (n = 122) were constrained by legal size limits to exceed 61 cm (24 in.) and averaged 72.6 ± 1.3 cm long; total mercury averaged 0.48 ± 0.021 μg/g and selenium averaged 0.29 ± 0.01 μg/g. For comparable sizes, angler-caught fish had significantly higher mercury levels (0.3 vs 0.21 μg/g) than trawled fish. In both the total and angler-only samples, mercury was strongly correlated with length (Kendall tau = 0.37; p < 0.0001) and weight (0.38; p < 0.0001), but was not correlated with condition or with selenium. In the whole sample and all subsamples, total length yielded the highest r2 (up to 0.42) of any variable for both mercury and selenium concentrations. Trawled fish from Long Branch in August and Sandy Hook in October were the same size (68.9 vs 70.1 cm) and had the same mercury concentrations (0.22 vs 0.21 ppm), but different selenium levels (0.11 vs 0.28 ppm). The seined fish (all from Delaware Bay) had the same mercury concentration as the trawled fish from the Atlantic coast despite being smaller. Angler-caught fish from the North (Sandy Hook) were larger but had significantly lower mercury than fish from the South (mainly Cape May). Selenium levels were high in small fish, low in medium-sized fish, and increased again in larger fish, but overall selenium was correlated with length (tau = 0.14; p = 0.006) and weight (tau = 0.27; p < 0.0001). Length-squared contributed significantly to selenium models, reflecting the non-linear relationship. Inter-year differences were explained partly by differences in sizes. The selenium:mercury molar ratio was below 1:1 in 20% of the fish and 25% of the angler-caught fish. Frequent consumption of large striped bass can result in exposure above the EPA’s reference dose, a problem particularly for fetal development.

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Section: Discussionmentioning

confidence: 99%

Seasonal, locational and size variations in mercury and selenium levels in striped bass (Morone saxatilis) from New Jersey

Gochfeld

Burger

Jeitner

et al. 2012

Environmental Research

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“…Toxicity of different chemical forms of mercury differs strongly, with MeHg being among the most potent forms (Potter et al, 1975;Richins et al, 1975;Copper, 1983).…”

Section: Discussionmentioning

confidence: 99%

Analysis of genetic susceptibility to mercury contamination evaluated through molecular biomarkers in at-risk Amazon Amerindian populations

et al. 2005

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We investigated Individual differences in susceptibility to methylmercury (MeHg) contamination and its relationship with polymorphisms of the detoxifying enzyme glutathione S-transferase (GST). In Brazil, some Amerindian tribes from the Amazon region have an increased level of mercury in their hair. Samples of hair and blood were taken from inhabitants of two villages in the Kayabi and Munduruku Amerindian communities to investigate mercury levels in association with genetic polymorphism of GSTs. Other molecular biological markers were also studied, such as hemoglobin, haptoglobin and glucose 6-phosphate dehydrogenase (G-6-PDH). Higher levels of mercury contamination were found in the Kayabi villagers, who had a null genotype (GSTM1 0/0, also denominated GSTM1 null) frequency of 26%, than in the Munduruku villagers, for which the null genotype frequency was 0%. Individuals with the GSTM1 null phenotype had higher concentrations of mercury in their hair than individuals with GSTM1+/+ phenotypes (F = 21.51, p < 0.0001). No association with other markers studied was observed. This study suggests that GSTM1 may be involved in the biotransformation of mercury in humans.

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“…During the peak of the boom (about 1860-1900) the Carson River flowed freely into Lahontan Valley until construction of Lahontan Dam and Reservoir in 1915. However, some mercury continues to reach SNWR (Wayne and others, 1996), and samples of water, bottom sediment, and food-web organisms have showed elevated concentrations of mercury in excess of fish and wildlife effect levels (Cooper, 1983;Hoffman and Thomas, 2000;Tuttle and others, 2001). Mercury methylation has been shown to be stimulated in wetlands and the process may be associated with wetland emergent vegetation (Windham-Meyers, 2009).…”

Section: Description Of Study Areamentioning

confidence: 99%

Chemical quality of water and bottom sediment, Stillwater National Wildlife Refuge, Lahontan Valley, Nevada

Thodal¹

2017

Data Series

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Total mercury in fishes and selected biota in lahontan reservoir, Nevada: 1981

Cited by 19 publications

References 9 publications

Seasonal, locational and size variations in mercury and selenium levels in striped bass (Morone saxatilis) from New Jersey

Seasonal, locational and size variations in mercury and selenium levels in striped bass (Morone saxatilis) from New Jersey

Analysis of genetic susceptibility to mercury contamination evaluated through molecular biomarkers in at-risk Amazon Amerindian populations

Chemical quality of water and bottom sediment, Stillwater National Wildlife Refuge, Lahontan Valley, Nevada

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