Impaired behavior and changes in some biochemical markers of bivalve (Ruditapes decussatus) due to zinc toxicity

Susceptibility and response of bivalves, the clam Ruditapes decussatus, to zinc (Zn) were studied by monitoring behavior using valve movement and some biochemical parameters. The LC 50 was 4.1 mg L −1 at 7 days. Depuration of Zn from their tissues was also followed. Accumulation of Zn increased with...

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Bibliographic Details
Published in:Toxicological and environmental chemistry 2015-05, Vol.97 (5), p.674-686
Main Authors: Soliman, Maha F.M., El-Shenawy, Nahla S., Tadros, Menerva M., Abd El-Azeez, Ahmed A.
Format: Article
Language:English
Subjects:
Biochemistry
Bivalvia
depuration
Environmental monitoring
glutathione
Impairment
Lipid peroxidation
Lipids
Marine
Markers
Mollusks
Oxidative stress
Ruditapes decussatus
Toxicity
valve movement
Valves
Zinc
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Summary:Susceptibility and response of bivalves, the clam Ruditapes decussatus, to zinc (Zn) were studied by monitoring behavior using valve movement and some biochemical parameters. The LC 50 was 4.1 mg L −1 at 7 days. Depuration of Zn from their tissues was also followed. Accumulation of Zn increased with concentration and duration of exposure. After 20 days, Zn caused impairment of valve movement as well as the antioxidant system, decreasing glutathione and protein levels and increasing the lipid peroxidation which is indicative of oxidative damage. Results suggested that behavior and biochemical parameters of clam R. decussatus were sensitive and suitable responses for assessing the effects of Zn on the aquatic ecosystems. It could be concluded that there is a time-dose-response relationship of Zn with behavior and oxidative stress of R. decussatus.
ISSN:0277-2248
1029-0486
DOI:10.1080/02772248.2015.1058381