IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Temperature-dependent stress response in oysters, Crassostrea virginica: pollution reduces temperature tolerance in oysters
Lannig, G.; Flores, J.F.; Sokolova, I.M. (2006). Temperature-dependent stress response in oysters, Crassostrea virginica: pollution reduces temperature tolerance in oysters. Aquat. Toxicol. 79(3): 278-287. dx.doi.org/10.1016/j.aquatox.2006.06.017
In: Aquatic Toxicology. Elsevier Science: Tokyo; New York; London; Amsterdam. ISSN 0166-445X, more
Peer reviewed article  

Available in Authors 

Keywords
    Cadmium; DNA; Marine molluscs; RNA; Temperature; Crassostrea virginica (Gmelin, 1791) [WoRMS]; Marine; Brackish water

Authors  Top 
  • Lannig, G.
  • Flores, J.F.
  • Sokolova, I.M.

Abstract
    Combined effects of temperature and a toxic metal, cadmium (Cd), on energy metabolism were studied in a model marine bivalve, the eastern oyster Crassostrea virginica, acclimated at 20, 24 and 28 °C and exposed to 50 μg l−1 of Cd. Both increasing temperature and Cd exposure led to a rise in standard metabolic rates, and combined stressors appeared to override the capability for aerobic energy production resulting in impaired stress tolerance. Oysters exposed to elevated temperature but not Cd showed no significant change in condition, survival rate and lipid peroxidation, whereas those exposed to both Cd and temperature stress suffered high mortality accompanied by low condition index and elevated lipid peroxidation. Furthermore, RNA/DNA ratios indicative of protein synthesis rate, and levels of glutathione, which is involved in metal detoxification, increased in Cd-exposed oysters at 20 °C but not at 28 °C. Implications of the synergism between elevated temperatures and cadmium stress on energy metabolism of oysters are discussed in the light of the potential effects of climate change on oyster populations in polluted areas.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors