Monitoring of ... 
3 Waste disposal from TiO^-production 
7 
7 Low dissolved oxygen in near 
bottom waters of the 
Eastern North Sea 
(see "Research") 
6 Radioactive discharges 
6 Fish and shellfisch contamination 
(see "TOSCH" and "JMP") 
7 Fish and shellfish population 
dynamics 
Parasites of commercially 
important fish species 
2. BFA-Fi 
3. Dethiefsen 
since 1985 2. RAH 
3. Reise 
2. NL WW, 
Fst K 
(Norderney) 
3. Michaelis 
2. BFA-Fi/RAH/ 
AWI 
2. BFA-Fi 
3. Feldt 
2. BFA-Fi 
2. BFA-Fi 
2. BFA-Fi 
Long term studies on fish disease occurrence. 
Effects on benthos near Helgoland. 
Studies on benthos and plankton in the 
Weser estuary (see BLMP). 
ro 
The impact of low dissolved oxygen on abundance ^ 
and distribution of fish is studied. 1 
Concentrations of radioactive material in 
fish and shellfish. 
Organochlorines and heavy metals in fish 
and shellfish. 
Long term studies on population changes in 
fish and shellfish. 
Frequencies and prevalences of selected 
parasites of marine fish are monitored.