text: LC50s for flow-through tests with Mysidopsis bahia and Cyprinodon variegatus were calculated two different ways -- ( 1 ) on the basis of the nominal toxicant concentrations ( Nom ) , and ( 2 ) on the basis of measured ( Meas ) toxicant concentrations .
  
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  Mysidopsis bahia and Cyprinodon variegatus contain toxins .