sures to sulphate-cellulose discharges, with subsequent migration to pure 

 water does not guarantee fish safety. These factors are especially dan- 

 gerous when combined with high temperature regimes. 



While the general symptoms of intoxication can be identified, there are 

 specific variations, depending upon the composition of the complex ef- 

 fluents, its concentration, the duration of exposure, and the species of 

 the test organism. 



ACKNOWLEDGMENTS 



My thanks are due to the research workers of the Petrozavodsk State 

 University named after O.W. Kuusinen; A.N. Ryzhkov, G.A. Tikka, and L.G. 

 Tyutyunnik for their help in performing the experiments. 



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