Acute toxicity, uptake, and clearance of aminocarb by the aquatic isopod, Caecidolea racovitzai racovitzai.

Acute toxicity of aminocarb to the aquatic isopod Caecidolea racovitzai racovitzai was found to be proportional to exposure temperature with the potency of the insecticide increasing 1.3 to 5.2 times when the temperature was increased from 12 to 20 degrees C. The 96-hr LC50 values were determined to be 36.1 and 12.0 mg aminocarb/liter for 12 and 20 degrees C, respectively. Uptake and clearance of aminocarb by C. r. racovitzai were also shown to be proportional to temperature indicating that they may be active processes. Control of clearance may be a function of the rate of metabolism of aminocarb in vivo. Both uptake and clearance were shown to occur in two compartments.