Metal bioaccumulation and metallothionein concentrations in larvae of Crassostrea gigas

Type Article
Date 2006-04
Language English
Author(s) Damiens Gautier1, Mouneyrac Catherine2, 3, Quiniou Francoise4, His Edouard4, Gnassia Barelli Mauricette1, Romeo Michèle1
Affiliation(s) 1 : UMR 1112 INRA-UNSA R.O.S.E., Faculty of Sciences, Parc Valrose, B.P. 71, 06108 Nice Cedex 2, France
2 : Centre d'Etude et de Recherche sur les écosystèmes aquatiques (CEREA), IBEA/UCO, 3 Place André Leroy, B.P. 10808, 49008 Angers Cedex 01, France
3 : Service d'Ecotoxicologie, SMAB-ISOMER, Faculté des Sciences, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France
4 : IFREMER, Ctr Brest, Dept Biogeochim & Ecotoxicol, F-29280 Plouzane, France.
Source Environmental Pollution (0269-7491) (Elsevier), 2006-04 , Vol. 140 , N. 3 , P. 492-499
DOI 10.1016/j.envpol.2005.08.006
WOS© Times Cited 53
Keyword(s) Bidassoa estuary, Arcachon bay, Metallothionein, Copper, Cadmium, Crassostrea gigas larvae
Abstract Larval stages of bivalve molluscs are highly sensitive to pollutants. Oysters from a hatchery from Normandy (English Channel) were induced to spawn, and fertilized eggs were exposed to copper or cadmium for 24 h. Metal accumulation (from 0.125 to 5 mu g Cu L-1 and from 25 to 200 mu g Cd L-1) and MT concentrations were measured in larvae. Compared to controls, larvae accumulated copper and cadmium with an increase in MT concentrations particularly with cadmium (i.e. 130.96 ng Cu (mg protein)(-1) and 12.69 mu g MT (mg protein)(-1) at 1 mu g Cu L-1 versus 23.19 ng Cu (mg protein)(-1) and 8.92 mu g MT (mg protein)(-1) in control larvae; 334.3 ng Cd (mg protein)(-1) and 11.70 mu g MT (mg protein)(-1) at 200 mu g Cd L-1 versus 0.87 ng Cd (mg protein)(-1) and 4.60 mu g MT (mg protein)(-1) in control larvae). Larvae were also obtained from oysters of a clean area (Arcachon Bay) and a polluted zone (Bidassoa estuary) and exposed to copper in the laboratory, their MT concentration was measured as well as biomarkers of oxidative stress. Biomarker responses and sensitivity to copper for the larvae from Arcachon oysters were higher than for those from Bidassoa.
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