9. Accumulation and Metabolism of Persistent Pesticides in 

 Freshwater Fish 

 F.Ya. Komarovskiy and A.Ya. Malyarevskaya Ill 



10. Some Factors Affecting the Toxicity of Ammonia to Fishes 



Robert V. Thurston 118 



11. The Prediction of the Effects of Pollutants on Aquatic 

 Organisms Based on the Data of Acute Toxicity Experiments 



O.F. Filenko and E.F. Isakova 138 



12. Age Specifics of Sensitivity and Resistance of Fish to 

 Organic and Inorganic Poisons 



V.I. Lukyanenko 156 



13. Synergistic Effects of Phosphorus and Heavy Metals 

 Loadings on Great Lakes Phytoplankton 



E.F. Stoermer, L. Sicko-Goad and D. Lazinsky 171 



14. Reversibility of Intoxication and Factors Governing It 



I.V. Pomozovskaya 187 



15. Aspects of the Interaction Between Benthos and 

 Sediments in the North American Great Lakes and 

 Effects of Toxicant Exposures 



John A. Robbins 202 



16. Recent Advances in the Study of Nitrite Toxicity to 

 Fishes 



Rosemarie C. Russo 227 



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