EFFECTS OF SIMULATED ENTRAINMENT 823 



Except for acute survival, means for assessing the impact of 

 entrainment on cladoceran zooplankton in tlie field appear to be 

 limited. Significant effects on ATP levels appear to be restricted to 

 the effects of chlorination. Because chlorination is intermittent, ATP 

 levels would not be affected when there is no chlorine present. 

 Oxygen consumption and long-term biological studies also are 

 insignificant, especially if the animals are cultured in the laboratory 

 under ideal conditions. Filtering rate may be an indicator, but, in all 

 probability, it will not provide meaningful data. Behavior was the 

 most unreliable method investigated. 



ACKNOWLEDGMENTS 



The research reported here was funded by a contract from the 

 Energy Research and Development Administration. 



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