||Toxicity of the Synthetic Pyrethroids, Permethrin and AC 222, 705 and Their Accumulation in Early Life Stages of Fathead Minnows and Snails.
Spehar, Robert L. ;
Tanner, Danny K. ;
Nordling, Beth R. ;
||Environmental Research Lab.-Duluth, MN.
Pimephales promelas ;
Fathead minnows ;
Helisoma trivolvis ;
Water pollution effects(Animals)
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Early life stages of fathead minnows (Pimephales promelas) were exposed to permethrin and AC 222, 705 and snails (Helisoma trivolvis) were exposed to permethrin in continuous flow-through exposures for approximately 30 days. Saturated solutions of each pesticide were used to avoid the use of solvents. Survival of newly hatched larvae and early juveniles was found to be the most sensitive measure of effect on fathead minnows of both pesticides. AC 222, 705 was approximately 20 times more toxic to fathead minnows than permethrin by the end of the test period.