Abstract
Flounders ( Platichthys flesus), which had been given oral doses of DDT, developed hyperactivity and abnormal diurnal activity 5–7 weeks after the dosage of DDT was terminated. For the flounder given the highest dose (12.5 mg DDT kg −1 fresh body weight) a more than 20-fold increase in swimming activity was recorded. The levels of DDT found in various organs (axial muscle, liver and brain) are compared with levels of DDT found in wild populations of fish from the Baltic Sea. The results are also discussed in relation to results obtained in a parallel study on the physiological effects of DDT on the flounder.
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