Methods: Used a modified pipette to retrieve Daphnia from cultured jar, then immobilized Daphnia in minimal amount of Vaseline on a depression slide. Obtained new Daphnia for each treatment and recorded baseline heart rate in aged water. In a double-blinded procedure, measured
Methods: Used a modified pipette to retrieve Daphnia from cultured jar, then immobilized Daphnia in minimal amount of Vaseline on a depression slide. Obtained new Daphnia for each treatment and recorded baseline heart rate in aged water. In a double-blinded procedure, measured