Acute and sub-acute toxicity of bark tannins in carp (Cyprinus carpio L.)

J. H.M. Temmink, J. A. Field, J. C. van Haastrecht, R. C.M. Merkelbach

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


The 24-h LC(I)50 and 96-h LC(I)50 of bark extract for carp (Cyprinus carpio L.) were estimated at approx. 65 and 50 mg/l total COD, respectively, in a semi-static system. Tannins, constituting 50-60% of total COD, are responsible for this toxicity. Considerable toxicity was also found in sub-acute studies in a flow-through system. In both systems oxidative polymerization of the tannins into high-molecular-weight polymers abolished the aquatic toxicity almost completely. Epithelial damage of the gill was the most important lesion of toxicity, supporting the hypothesis that the toxic action of oligomeric bark tannins is through binding to and cross-linking of cell membrane enzymes.

Original languageEnglish (US)
Pages (from-to)341-344
Number of pages4
JournalWater research
Issue number3
StatePublished - Mar 1989


  • acute toxicity
  • bark tannins
  • carp
  • gill structure
  • oxidative detoxification
  • sub-acute toxicity

ASJC Scopus subject areas

  • Water Science and Technology
  • Ecological Modeling
  • Pollution
  • Waste Management and Disposal
  • Environmental Engineering
  • Civil and Structural Engineering


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