Experiments were conducted under laboratory conditions on young specimens of Carassius carassius L., Cyprinus carpio L. and on adult specimens of Leucaspius delineatus Haeckel. The fish were subjected to a 30-day exposure to gamacarbatox suspension in a dose of 0.5 mg 1-1, containing 10% of lindane as active substance. Directly after the experiment on day 30, and then 40 and 50, lindane content was assessed in the muscles, liver and brain using the method of gas chromatography with an electron capture detector. In all the fish examined, the highest accumulation of lindane and its longest duration were observed in the brain. Less lindane was noted in the liver. The lowest level of lindane was found in the muscles and its concentration in that tissue decreased most rapidly.
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