Heavy Metal Storage in Marine Animals Under Various Environmental Conditions

Bouquegneau, Jean-Marie; Martoja, M.; Truchet, M.

doi:10.1007/978-3-642-69903-0_13

Cited by 14 publications

(3 citation statements)

References 38 publications

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“…It will be also necessary to improve the assessment of seasonal changes of MT levels in relation to metal concentrations and weight fluctuations which have been well documented (NRC 1980). Concerning possible seasonal changes of MT, a seasonal cycling of Cd-binding between MTLP and intra-cellular granules (also involved in detoxication; Mason & Jenkins 1995) has been shown in some nlolluscan species (Bouquegneau et al 1984).…”

Section: Discussionmentioning

confidence: 99%

Effects of natural factors (salinity and body weight) on cadmium, copper, zinc and metallothionein-like protein levels in resident populations of oysters Crassostrea gigas from a polluted estuary

Mouneyrac¹,

Amiard²,

Amiard‐Triquet³

1998

Mar. Ecol. Prog. Ser.

127

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The Gironde estuary has been shown to be the most Cd-contaminated area In France. Oysters Crassostrea gigas of different size classes were sampled from 3 sites between the mouth and 25 km upstream, to study the relative importance of natural and contamination factors on metal accumulation and metallothionein-like protein (MTLP) induction. The highest metal and MTLP concentrations were observed in the digestive gland. In all organs, the 3 metals were mainly cytosolic. An inverse relationship was generally observed between weight of soft tissues and metals or MTLP concentrations in the whole soft tissues, whereas the influence of weight on metal distribution among cytosolic and insoluble fractions was small. When oysters with similar weight of soft tissues were considered, no influence of salinity at different sites was found for Cu and Zn whereas the lowest soluble and insoluble Cd concentrations were observed at the mouth of the river. Salinity did not influence Cu and Zn distribution among the cytosolic or insoluble fractions whereas cytosolic Cd in gills and digestive gland (%) was higher at the mouth of the estuary than upstream. MTLP and metal concentrations were generally positively correlated except at those sites where metal concentrations were lowest. However when multiple regression analyses were performed, weight appeared also as a major or an important factor to explain vanations of MTLP levels, the prevalence of this natural factor versus contan~ination factors being different at ddferent sites. KEY WORDS. Oyster. Heavy metals. Metallothionein

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Section: Discussionmentioning

confidence: 99%

Effects of natural factors (salinity and body weight) on cadmium, copper, zinc and metallothionein-like protein levels in resident populations of oysters Crassostrea gigas from a polluted estuary

Mouneyrac¹,

Amiard²,

Amiard‐Triquet³

1998

Mar. Ecol. Prog. Ser.

127

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“…In Cerithium vulgatum, Mn, Fe, Co, Ni and Zn were associated with phosphate granules in the digestive epithelium, and in Murex trunculus Cu was associated with sulphur as aggregates within pore cells of the connective tissue in the digestive gland (Bouquegneau and Martoja, 1982;Bouquegneau et al, 1984;Mason et al, 1984). Cd, Ag and Cr did not occur in these accumulations.…”

Section: Electrostatic Binding Versus Covalent Bindingmentioning

confidence: 99%

Metals and marine food chains

Nott¹

1998

Metal Metabolism in Aquatic Environments

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“…These are heat stable and of low molecular mass, and have a high content of cysteine. They occur in many marine invertebrates (Simkiss & Mason 1983 ;Bouquegneau et al 1984) including Murex trunculus (Bouquegneau et al 1983). They bind bismuth, cadmium, copper, gold, mercury, silver and zinc, some of which can induce the synthesis of the protein.…”

Section: Discussionmentioning

confidence: 99%

The cytology of heavy metal accumulations in the digestive glands of three marine gastropods

Nott

Nicolaidou

1989

Proc. R. Soc. Lond. B

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In the digestive glands of gastropod molluscs, metals are metabolized in the sense that they are subject to inorganic biochemical processes within the epithelial cells and lumen of the digestive tubules and the pore cells in the intervening connective tissue. These systems have been examined in the tower shell Cerithium vulgatum Bruguieres, a sediment feeder, the top shell Monodonta articulata Lam., a grazing herbivore, and in the whelk Murex trunculus L., a carnivore whose prey includes Cerithium . These animals were taken from a Mediterranean environment polluted by heavy metals. In all three species the metals are compartmentalized within mineralized granules as phosphates and within lysosomal residual bodies in association with sulphur. However, the extent to which a particular metal is accumulated and the relative proportions that are bound within the different compartments are factors that are primarily determined by the species and not the concentration available in the environment. Thus Cerithium accumulates high concentrations of a wide range of metals from the ingested sediment and these are rendered insoluble and non-toxic in the digestive gland. This unavailability is transferred to Murex when it eats Cerithium because Murex does not accumulate the full range of metals from its prey. Indeed, for some metals there appears to be bioreduction rather than bioamplification. The grazing herbivore Monodonta articulata accumulates a third distinct spectrum of metals. The accumulations in each species do not reflect the levels of all the metals in the environment. The presence of metals in the digestive glands is associated with the removal of magnesium from the phosphate granules but also with an increase in the concentration of magnesium in the tissue. It is proposed that metals induce the formation of magnesium phosphate as a source of metal-binding phosphate ions.

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Heavy Metal Storage in Marine Animals Under Various Environmental Conditions

Cited by 14 publications

References 38 publications

Effects of natural factors (salinity and body weight) on cadmium, copper, zinc and metallothionein-like protein levels in resident populations of oysters Crassostrea gigas from a polluted estuary

Effects of natural factors (salinity and body weight) on cadmium, copper, zinc and metallothionein-like protein levels in resident populations of oysters Crassostrea gigas from a polluted estuary

Metals and marine food chains

The cytology of heavy metal accumulations in the digestive glands of three marine gastropods

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