Publication Date:
2021-03-19
Description:
Baltic mussels (Mytilus spp.) were exposed to the explosive trinitrotoluene (TNT) for 96 h (0.31–10.0 mg/L) and
21 d (0.31–2.5 mg/L). Bioaccumulation of TNT and its degradation products (2- and 4-ADNT) as well as biological
effects ranging from the gene and cellular levels to behaviour were investigated. Although no mortality
occurred in the concentration range tested, uptake and metabolism of TNT and responses in antioxidant enzymes
and histochemical biomarkers were observed already at the lowest concentrations. The characteristic shell
closure behaviour of bivalves at trigger concentrations led to complex exposure patterns and non-linear responses
to the exposure concentrations. Conclusively, exposure to TNT exerts biomarker reponses in mussels
already at 0.31 mg/L while effects are recorded also after a prolonged exposure although no mortality occurs.
Finally, more attention should be paid on shell closure of bivalves in exposure studies since it plays a marked role
in definining toxicity threshold levels.
Repository Name:
EPIC Alfred Wegener Institut
Type:
Article
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isiRev
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info:eu-repo/semantics/article
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