Valimar (Summary)

                                 

 

 AIM OF THE PROJECT:

  • Evaluation of effects of environmental stressors such as contaminants on the health of aquatic organisms including fish and invertebrates.
  • Validation of biomarker responses with respect of their sensitivity and specifity to indicate environmental pollution.
  • Understanding response patterns of biomarkers representative of different levels of biological organization.
  • Understanding the dynamics of the stress response curves and the effects of temperature and other confounding factors on biomarker responses.
  • Evaluation of the ecological value of biomarker responses.

 

WHAT´S GOING ON ?

  • Biomarkers are simultanously applied over several years to brown trout (Salmo trutta f. fario) and loach (Barbatula barbatula) exposed in flow-through systems ("bypass-systems") to the water of two model streams in Germany (Körsch and Krähenbach).
  • Selected markers are investigated also in snail, crayfish and leech.

 

APPLIED BIOMARKERS:

  • Stress Proteins (Köhler, Tübingen)
  • Biotransformation enzymes (Segner, Leipzig)
  • Metabolic enzymes (Braunbeck, Heidelberg)
  • Ultrastructure of selected organs - liver, kidney and gill (Triebskorn, Tübingen)
  • Histopathology and parasites (Schwaiger, Munich)
  • Swimming behavior (Triebskorn, Tübingen)


Results obtained under these semi-field conditions are compared with biomarker responses in fish caught directly in the streams.

 

SUBPROJECTS NOT DEALING WITH BIOMARKERS:

  • Chemical analyses in water, sediment, fish, dust, sewage plant effluxes (Honnen, Reutlingen)
  • Limnological investigations (Triebskorn, Tübingen)
  • In vitro tests with fish cell culture (Braunbeck, Heidelberg)
  • Bioluminiscence tests (Honnen, Reutlingen)
  • Embryo-larval tests (Oberemm, Berlin)
  • Nematode tests (Traunspurger, Bielefeld)
  • Studies on fish population and invertebrate community in the model streams (Böhmer, Hohenheim)
  • Ecomorphological investigations (Lehmann, Weilheim)
  • Multivariate analyses of results and modelling (Schüürmann, Leipzig)