Relationships between contaminant levels in marine sediments and their biological effects on embryos of oysters, <i>Crassostrea gigas</i>

Geffard, Olivier; Budzinski, Hélène; His, Édouard; Seaman, Matthias; Garrigues, Philippe

doi:10.1002/etc.5620211108

Cited by 36 publications

(24 citation statements)

References 46 publications

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“…In comparison with the French Géode classification system, Dunkerque sediment is characterized by a Cu and Pb contamination and is more contaminated than the Bidassoa one which is only Cu-enriched. Dunkerque sediments are equally highly contaminated by polycyclic aromatic hydrocarbons (Geffard et al 2002b). …”

Section: Discussionmentioning

confidence: 99%

“…These concentrations have been selected because they do not previously induced abnormal effects on the embryonic development of Crassostrea gigas. The maximum concentrations tested correspond to the No Observed Effect Concentrations (NOEC; Geffard et al 2002b). …”

Section: Elutriate Preparationmentioning

confidence: 99%

“…Mature oysters were collected in Arcachon Bay (French) which is extensively used for oysters farming based on Pacific oysters Crassostrea gigas and was thus assumed to have a good 'biological quality' (Geffard et al 2002b). The procedure to obtain embryos was described in detail by Geffard et al (2001aGeffard et al ( , 2002c.…”

Section: Larval Rearingmentioning

confidence: 99%

“…More recently, metallothionein-like protein induction was detected in veligers of M. galloprovincialis exposed to natural contaminated sediment (Geffard et al 2002c). However, these authors used freeze-dried sediment known to be more toxic than the fresh sediment (Geffard et al 2002b(Geffard et al , 2004). …”

Section: Introductionmentioning

confidence: 99%

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Bioaccumulation of Metals in Sediment Elutriates and Their Effects on Growth, Condition Index, and Metallothionein Contents in Oyster Larvae

Geffard

Geffard²,

Amiard³

et al. 2007

Arch Environ Contam Toxicol

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The bioavailability of Cd, Cu, Zn and Pb from two metal-contaminated sediment (Bidassoa and Dunkerque) was studied using Crassostrea gigas larvae exposed to sediment elutriates. The metal contents within the sediments, the larvae and larval growth, the condition index, and the induction of metallothionein in the larvae were measured. The larval growth and condition index were only affected after exposure to the highest elutriate concentration (5 to 25%) from the most contaminated sediment (Dunkerque). Bioaccumulation of all metals was observed in larvae exposed to Dunkerque elutriatre and only Cu bioaccumulation was observed in the case of Bidassoa elutriate. The compilation of results from larvae exposed to both sediment elutriate show a strongly correlation between bioaccumulated metal considered individually or combined and metallothionein level in larvae presenting no detrimental effect.In contrary, in the case of larvae exposed to the highest Dunkerque elutriate concentration and showing the highest metal body burdens, we observed a drop of the metallothionein level.These results indicate that metallothionein is a more sensitive indicator of heavy metal pollution, compared to physiological endpoints taking into account in bioassays and could be proposed as precocious biomarker of metals exposure in larvae. However, it must be take care to the "fault control" due to toxicological effect on larvae metabolism in the case of important contaminant exposure.3

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Section: Discussionmentioning

confidence: 99%

Section: Elutriate Preparationmentioning

confidence: 99%

Section: Larval Rearingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bioaccumulation of Metals in Sediment Elutriates and Their Effects on Growth, Condition Index, and Metallothionein Contents in Oyster Larvae

Geffard

Geffard²,

Amiard³

et al. 2007

Arch Environ Contam Toxicol

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“…Geffard et al (2002) determined an EC20 of 2.8 mg/L for larval development of the oyster, Crassostrea gigas. NH3 concentrations were estimated using a studyspecific temperature and assumed values for salinity and pH.…”

Section: Summaly Of Ammonia Toxicity In Larval Development Testsmentioning

confidence: 99%

Comparison of porewater and elutriate bivalve larval development toxicity testing in a sediment quality triad framework

McDonald

2005

Ecotoxicology and Environmental Safety

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The magnitude and extent of contaminated marine sediment are frequently assessed using a Sediment Quality Triad framework involving multiple toxicity tests using a variety of species, toxicological endpoints and exposure systems. Data are integrated into an overall assessment of sediment quality using a weight of evidence approach. Guidance on the selection of appropriate toxicity tests recommends a wide range of organism type, life-cycle, exposure route, and feeding type be includedporewater bivalve larval development tests increases the number of exposure routes under consideration.Interpretation of porewater toxicity data are subject to limitations, in part, related to the extensive chemical manipulations associated with the extraction of in situ anoxic porewater and the subsequent aeration required for the laboratory-based toxicity test. The ability of the porewater-only test to represent ecologically relevant adverse effects in the field appears minimal. Results from concurrent porewater and elutriate toxicity testing using newly fertilized larvae of the bivalve, Mytilus galloprovincialis are provided to illustrate these problems. Porewater samples were consistently more toxic than the corresponding elutriate sample, and ammonia, a common confounding factor in sediment toxicology, was identified as the most likely toxic agent for the majority of samples.Porewater toxicity testing using M galloprovincialis is therefore not recommended as a routine element of the sediment quality triad unless additional chemistry (samples used for testing as well as in situ) are available to facilitate an appropriate interpretation of the resulting toxicity data. DEDICATIONFor all the support and understanding from my beloved wife, Elana.

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Mobility and potential toxicity of sediment-bound metals in a tidal estuary

Geffard¹,

Geffard

Budzinski

et al. 2005

Environ. Toxicol.

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Sediment toxicity in the Gironde Estuary, France, a site contaminated by such trace metals as Cd, Cu, and Zn, was examined monthly from March to October 1997, using concurrently geochemical procedures to assess the mobility of contaminants and ecotoxicity tests with invertebrate larvae (the oyster Crassostrea gigas, the sea urchin Paracentrotus lividus, and the copepod Tigriopus brevicornis). Higher mobility of Cd than of Cu and Zn was shown by desorption tests. Both the gross concentrations of Cu and Zn in the sediment and the mobility of these metals showed a temporal evolution, and changes in the toxicity of the sediment to invertebrate larvae generally were observed concomitantly. Little damage was registered in the spring, and greater damage was found in the summer and fall. Positive correlations were shown between mortality in copepods or abnormalities in oyster larvae with the quantities of metals remobilized from sediment at pH 4. On the contrary, no clear temporal trend was shown for total PAH levels in sediment. These correlations and previous toxicological data suggest that sediment-bound metals, particularly Cu and Zn, possibly play a role in biological responses.

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Relationships between contaminant levels in marine sediments and their biological effects on embryos of oysters, Crassostrea gigas

Cited by 36 publications

References 46 publications

Bioaccumulation of Metals in Sediment Elutriates and Their Effects on Growth, Condition Index, and Metallothionein Contents in Oyster Larvae

Bioaccumulation of Metals in Sediment Elutriates and Their Effects on Growth, Condition Index, and Metallothionein Contents in Oyster Larvae

Comparison of porewater and elutriate bivalve larval development toxicity testing in a sediment quality triad framework

Mobility and potential toxicity of sediment-bound metals in a tidal estuary

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