Hg and metallothionein-like proteins in the black scabbardfish Aphanopus carbo

Bebianno, Maria João; Santos, Carolina; Canário, João; Gouveia, Nuno; Sena-Carvalho, D.; Vale, Carlos

doi:10.1016/j.fct.2007.02.003

Cited by 43 publications

(29 citation statements)

References 65 publications

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“…Both THg and MeHg exhibited similar distributions in different subcellular fractions because more than 80% of THg in all the major fractions was in MeHg form. These results and earlier studies have demonstrated that cellular debris is the major binding site for Hg in fish (Bebianno et al 2007, Barghigiani et al 1989. However, Amlund et al (2007) found that MeHg in the Atlantic cod (Gadus morhua) following three months of dietary exposure to MeHg was predominantly (99%) bound to protein in the muscle.…”

Section: Subcellular Distribution Of Hg and Its Implicationcontrasting

confidence: 44%

Biodynamic understanding of mercury accumulation in marine and freshwater fish

Wang¹

2012

Advances in environmental research

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Abstract. Mercury (Hg) is a global environmental pollutant that has been the cause of many public concerns. One particular concern about Hg in aquatic systems is its trophic transfer and biomagnification in food chains. For example, the Hg concentration increases with the increase of food chain level. Fish at the top of food chain can accumulate high concentrations of Hg (especially the toxic form, methylmercury, MeHg), which is then transferred to humans through seafood consumption. Various biological and physiochemical conditions can significantly affect the bioaccumulation of Hg−including both its inorganic (Hg(II)) and organic (MeHg) forms−in fish. There have been numerous measurements of Hg concentrations in marine and freshwater fish worldwide. Many of these studies have attempted to identify the processes leading to variations of Hg concentrations in fish species from different habitats. The development of a biokinetic model over the past decade has helped improve our understanding of the mechanisms underlying the bioaccumulation processes of Hg in aquatic animals. In this review, I will discuss how the biokinetic modeling approach can be used to reveal the interesting biodynamics of Hg in fish, such as the trophic transfer and exposure route of Hg(II) and MeHg, as well as growth enrichment (the increases in Hg concentration with fish size) and biomass dilution (the decreases in Hg concentration with increasing phytoplankton biomass). I will also discuss the relevance of studying the subcellular fates of Hg to predict the Hg bioaccessibility and detoxification in fish. Future challenges will be to understand the inter-and intra-species differences in Hg accumulation and the management/mitigation of Hg pollution in both marine and freshwater fish based on our knowledge of Hg biodynamics.

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Section: Subcellular Distribution Of Hg and Its Implicationcontrasting

confidence: 44%

Biodynamic understanding of mercury accumulation in marine and freshwater fish

Wang¹

2012

Advances in environmental research

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“…It is proposed that in mammals, mollusks and fish, MTs play a key role in Hg or Cd detoxification, but Hg or Cd stimulated different inductions of MT mRNA (Bourdineaud et al, 2006;Krishna et al, 2006). In the black scabbard fish, there are some relationships between MT and Hg concentrations, although this relationship is tissue dependent (Bebianno et al, 2007). MT or MT-like proteins were reported to be induced by Pb in rats, human, and fish (Ikebuchi et al, 1986;Church et al, 1993;Cheung et al, 2005).…”

Section: Induction Of Tpig-mt1 Transcription By Heavy Metals and Hydrmentioning

confidence: 99%

Cloning, characterization, and gene expression analysis of a novel cadmium metallothionein gene in Tetrahymena pigmentosa

Guo

Miao

2008

Gene

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“…the mean levels detected in the muscle of black scabbardfish from both mainland portugal and azorean waters were lower than the limits established by the european union (1.0 mg/ kg) for human consumption. however, in Madeiran specimens, the muscle showed mean values higher than 1.0 mg/kg, a situation already described by Bebiano et al (2007), especially for specimens larger than 100 cm. comparing the hg levels present in the three tissues analysed, significant differences were found in every tissue between specimens from mainland portugal, Madeiran and azorean waters.…”

Section: Non-conclusive Methodologiesmentioning

confidence: 60%

Stock structure of black scabbardfish (<i>Aphanopus carbo</i> Lowe, 1839) in the southern northeast Atlantic

et al. 2009

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SuMMarY: Black scabbardfish stock structure is still unknown in european waters where, due to the scarcity of biological information, the IceS considers that there is a single stock unit. this study is the final outcome of a scientific project that applies a holistic approach to research on the population structure of the black scabbardfish and aims to define the most appropriate strategy for the conservation of this resource in southern ne atlantic waters. the factors studied include life history parameters, otolith shape analysis, parasites, landings-and-effort data and contaminants. Sampling was conducted between 2005 and 2007 in three areas of the southern ne atlantic: mainland portugal, Madeira and the azores. the mainland and the azores have an established commercial fishery, whereas the azores has only an exploratory fishery. the majority of results indicated the existence of different stocks of black scabbardfish in the study area. of the 8 parameters, 6 were in agreement with separate stocks between the mainland and Madeira, 5 were in agreement with separate stocks between the mainland and the azores, and 4 were in agreement with separate stocks between Madeira and the azores.Keywords: Aphanopus carbo, black scabbardfish, stock identity, holistic approach, northeast atlantic.reSuMen: Estructura de stock de sable negro (AphAnopus cArbo Lowe, 1839) en el sur del Atlántico nordeste. -La estructura de la población de sable negro en las aguas europeas es todavía desconocida y, debido a la escasez de la información biológica disponible, IceS ha considerado una sola unidad de stock en la totalidad de dichas aguas. el proyecto que originó este estudio es un trabajo integrado para investigar la estructura poblacional de sable negro y pretende definir la estrategia más apropiada para la conservación de este recurso en aguas del sur del atlántico nordeste. para cumplir con el objetivo del proyecto se llevaron a cabo varios estudios: determinación de parámetros que definen el ciclo vital, análisis de forma del otolito, parásitos, datos de desembarques y esfuerzo pesquero, y contaminantes. el muestreo fue realizado entre 2005 y 2007 en tres áreas del sur del atlántico nordeste: portugal continental, aguas de Madeira y azores. Las dos primeras áreas tienen una pesquería comercial establecida, mientras que en azores existe una pesquería exploratoria. La mayoría de los resultados concluyeron la existencia de diferentes unidades poblacionales del sable negro en el área sur del atlántico nordeste. Seis de los ocho parámetros confirman la separación entre los individuos del continente y Madeira, mientras que 5 parámetros corroboran la separación entre el continente y azores. Solamente 4 técnicas corroboran la separación entre Madeira y azores.Palabras clave: Aphanopus carbo, sable negro, identidad de stock, aproximación holística, atlántico nordeste.

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Hg and metallothionein-like proteins in the black scabbardfish Aphanopus carbo

Cited by 43 publications

References 65 publications

Biodynamic understanding of mercury accumulation in marine and freshwater fish

Biodynamic understanding of mercury accumulation in marine and freshwater fish

Cloning, characterization, and gene expression analysis of a novel cadmium metallothionein gene in Tetrahymena pigmentosa

Stock structure of black scabbardfish (<i>Aphanopus carbo</i> Lowe, 1839) in the southern northeast Atlantic

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