TABLES 



Section Page 



4 Maximum Acceptable Toxicant Concentrations (MATC) From 



Partial and Complete Life-Cycle Toxicity Tests with 



Fish as Compared with MATC'S Derived From Embryo, 



Larvae, and Early Juvenile Toxicity Tests 46 



5 Relationship of LT50 (mg/liter) of Chlorophos for 



Current Year's Brood of Fish as a Function of Time 



of Exposure 62 



5 Relative Toxicoresistance of Fresh-Water Test Organisms 



Used in Toxicologic Experiments in the USSR and USA ... 63 



5 Reversibility of Intoxication in Perch 64 



Organophosphorus Pesticides and Their Hazardous to 

 Aquatic Animals 84 



Persistence of Selected Organophosphorus Pesticides 



in Water 85 



Persistence of Selected Organic Pesticides in Soil 86 



Toxicity of Organophosphorus Pesticides to Aquatic 



Animals 86 



Dylox Toxicity for Selected Aquatic Organisms 87 



Changes in the Acetyl Cholinesterase Activity of the 

 Perch Brain in the Minimum Tolerable Concentrations of 

 Dylox with Subsequent Washing in Freshwater 90 



7 Cholinesterase Activity in Perch Brain as a Result of 

 Periodic Additions of Dylox to the Exposure Chamber ... 93 



8 National Pesticide Monitoring Program Network: A List 

 of Environmental Components and the Respective 

 Agencies Responsible for Monitoring Contaminant Trends 

 in Each 98 



XI v 



