Mercury and chlorinated hydrocarbons in the food chain of Lake Paijanne, Finland

The sediments and various organisms in Lake Paijanne were examined for contaminants. The average mercury content of water plants was 9, of plankton 14, of sediment 114, of zoobenthic predators 83, of fish 332–1510 and of birds 240–13685 μg kg−1 (wet weight). The average PCB content of plants was 3, of plankton 21, of the zoobenthos 44, of fish 36-117 and of birds 219–13490 μg kg−1. The average ΔDDT content of plants was 0.5, of plankton 6, of the zoobenthos 14, of fish 7–42 and of birds 144-8262 μg kg−1. Regional differences in mercury content were most pronounced in sediment and fish. PCB concentration was highest near a town. ΔDDT was quite evenly distributed. Water plant species did not …

Chlorinated hydrocarbons and total mercury in the prey of the white-tailed eagle (Haliaeetus albicilla L.) in the quarken straits of the gulf of bothnia, Finland

Samples of the white-tailed eagle population and its prey were collected from the Quarken straits area of the Gulf of Bothnia, Finland, and were analyzed for DDT, DDD, PCBs, aldrin, lindane, and mercury. Mercury, PCB, and DDE were detected in all animals studied. It was concluded that one of the most important reasons for the poor breeding results of the white-tained eagle (especially hatchability) are the combined effects of the studied pollutants originating for the most part from the fish-eating species in its prey (mergansers and great crested grebes). (JTE)

Acute and short-term toxicity of 2,3,4,6-tetrachlorophenol in rats

Acute toxicity of some chlorinated phenols, catechols and cresols to trout.