Retention of methyl mercury and inorganic mercury in rainbow trout Oncorhynchus mykiss (W): effect of dietary selenium

Bjerregaard, Poul; Andersen, Beth W; Rankin, J. C.

doi:10.1016/s0166-445x(98)00099-x

Cited by 43 publications

(33 citation statements)

References 39 publications

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“…Exposing rodents to low doses of MeHg + induces the accumulation of Hg in target organs [143][144][145]. In this way, Hg levels after co-exposure to SeMet have been measured in the brains, kidneys and livers of fish, aquatic birds, rodents and primates, but a number of inconsistencies have been found [146][147][148].…”

Section: Traffickingmentioning

confidence: 99%

Biological responses related to agonistic, antagonistic and synergistic interactions of chemical species

et al. 2012

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The fact that the essential or toxic character of elements is species specific has encouraged the development of analytical strategies for chemical speciation over the last twenty years; indeed, there are now a great number of them that provide very good performance. However, biological systems are exposed to a complex environment in which species of elements can interact in a synergistic/antagonistic fashion. Thus, the metabolism of trace elements cannot be considered in isolation. On the other hand, biological systems are dynamic, so it is necessary to study the trafficking of species of elements between organs, tissues or cell compartments in order to decipher the biochemical processes of the interactions in which they are involved. Although the application of liquid chromatography-inductively coupled plasma-based "metallomics" methods in combination with organic mass spectrometry can provide much-needed insight, new analytical strategies are required to really understand the role of species of elements in biological systems and the mechanisms of their interactions. In the present paper, the interactions of the most widely studied elements in this context (Se, Hg and As) are discussed, as well as other important interactions between different elements.

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Section: Traffickingmentioning

confidence: 99%

Biological responses related to agonistic, antagonistic and synergistic interactions of chemical species

et al. 2012

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“…That Hg in fish tissue was suppressed by Se in our study was suggested by a strong negative correlation for both bluegill and largemouth bass. Several mechanisms for the antagonistic relationship between Hg and Se have been suggested, including Se inhibition of methylating bacteria by binding with inorganic Hg, and Se-mediated competition, redistribution, demethylation and elimination of MeHg from fish tissues (Arribére et al 2008;Bjerregaard et al 1999;Chen et al 2001;Iwata et al 1982;Yang et al 2008;Khan and Wang 2009). Fish tissue Hg and trophic position typically have a strong positive relationship because of the bioaccumulative nature of MeHg (Hall et al 1997).…”

Section: Error Bars Represent ±1sementioning

confidence: 99%

“…Though often toxic, elevated levels of Se in fish have been linked to reduced fish tissue Hg (Arribére et al 2008;Chen et al 2001;Southworth et al 2000). For example, laboratory experiments with rainbow trout, Oncorhynchus mykiss, indicated that fish fed selenium-rich diets had enhanced elimination rates of MeHg and inorganic Hg from tissues (Bjerregaard et al 1999). Though previous research suggests that Se may decrease Hg concentrations in fish tissue, not enough is known to make predictions regarding fish tissue Hg accumulation near power plants.…”

Section: Introductionmentioning

confidence: 99%

Does proximity to coal-fired power plants influence fish tissue mercury?

et al. 2010

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Much of the mercury contamination in aquatic biota originates from coal-fired power plants, point sources that release mercury into the atmosphere. Understanding mercury dynamics is primarily important because of the toxic threat mercury poses to wildlife and humans through the consumption of contaminated fish. In this study, we quantified the relative importance of proximity to coal-fired power plants on mercury accumulation in two fish species of different trophic positions. Fish, water and sediment were collected and analyzed from 14 lakes, seven near to (<10 km) and seven far from (>30 km) coal-fired power plants. Lower tissue mercury and higher tissue selenium concentrations were measured in fish collected near power plants. Moreover, mercury accumulation in fish was driven by biotic characteristics (e.g., trophic position, total length, age), waterbody characteristics (e.g., pH, dissolved organic carbon and sulfate) and distance from power plants. Proximity to an atmospheric point-source of mercury and selenium, such as a coal-fired power plant, affects the quantities of mercury and selenium accumulated in fish tissue. Differences in accumulation are hypothesized to be driven in part by selenium-mitigated reductions in fish tissue mercury near power plants. Although reduced fish tissue mercury in systems near power plants may decrease mercury-specific risks to human consumers, these benefits are highly localized and the relatively high selenium associated with these tissues may compromise ecological health.

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“…Turner and Rudd (1983) suggested that Se had to be accumulated in the muscle of fish before the elimination of mercury from the muscle was promoted, but Bjerregaard et al (1999) showed that MeHg was eliminated from the muscle of rainbow trout (Oncorhynchus mykiss) without any significant accumulation of selenium in the tissue. These results indicate that there was a biochemical action of selenium on mercury and the muscle may not be the primary organ in which the interaction between Se and MeHg occurs, favoring the elimination of MeHg.…”

Section: Seleniummentioning

confidence: 99%

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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Retention of methyl mercury and inorganic mercury in rainbow trout Oncorhynchus mykiss (W): effect of dietary selenium

Cited by 43 publications

References 39 publications

Biological responses related to agonistic, antagonistic and synergistic interactions of chemical species

Biological responses related to agonistic, antagonistic and synergistic interactions of chemical species

Does proximity to coal-fired power plants influence fish tissue mercury?

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

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