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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. https://dx.doi.org/10.1016/j.aquatox.2006.06.017 In: Aquatic Toxicology. Elsevier Science: Tokyo; New York; London; Amsterdam. ISSN 0166-445X; e-ISSN 1879-1514

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Beschikbaar in	Auteurs
VLIZ: Non-open access 352986 [ aanvragen ]

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Trefwoorden

Acids > Organic compounds > Organic acids > Nucleic acids > DNA Acids > Organic compounds > Organic acids > Nucleic acids > RNA Chemical elements > Metals > Heavy metals > Cadmium Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine molluscs Properties > Physical properties > Thermodynamic properties > Temperature Crassostrea virginica (Gmelin, 1791) [WoRMS] Marien/Kust; Brak water

Author keywords

oyster; temperature; cadmium; aerobic scope; lipid peroxidation; RNA/DNAratios

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Auteurs		Top
Lannig, G. Flores, J.F. Sokolova, I.M.

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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.

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