Journal
MARINE ENVIRONMENTAL RESEARCH
Volume 122, Issue -, Pages 11-22Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2016.09.002
Keywords
Heavy metals; Biomarker; Crassostrea gigas; Integrative biological response; Ecotoxicology
Funding
- Basque Government [GIC07/26-IT-393-07]
- MINECO [CTM2012-40203-C02-01]
- La Region de Aquitaine
- le FEDER Aquitaine
- l'Agence Nationale de Recherche [ANR-07-VULN-003]
- Agence de l'Eau Adour-Garonne
- University of the Basque Country
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Oysters are considered sentinel organisms in environmental water quality monitoring programs in which cell and tissue level biomarkers are reliable tools. Copper (Cu) and silver (Ag) are present in relatively high concentrations in several estuaries, potentially affecting environmental and human health. Crassostrea gigas oysters were exposed during 28 days to a range of environmentally relevant concentrations of Cu and Ag alone or in mixture. Effects were studied through cell and tissue level biomarkers approach. Results indicated: changes in the Condition Index (CI), altered digestive gland epithelium and, presence of histopathological alterations in the gonad and digestive gland of exposed oysters. A time-dependent increase in lipofuscin contents in exposed oysters and an increase in intralysosomal metal accumulation in digestive cells through the experiment were also recorded. The Integrative Biological Response (IBR) Index showed that even at low exposure levels, Ag and Cu can produce alterations on oysters' health status. (C) 2016 Elsevier Ltd. All rights reserved.
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