Decay and Recovery of Luminescent Ability in Gonyaulax monilata

Abstract

SOME species of dinoflagellates respond to mechanical stimuli by emitting visible light. When stimuli of constant intensity are applied at regular time-intervals progressively lower light-intensities result. This is caused by a temporary exhaustion of the bioluminescent system of the organisms. Recovery can be complete provided the organisms are permitted to rest for a suitable period of time. A mathematical model is proposed to describe the response of Gonyaulax monilata to mechanical stimuli of 1/2-sec duration occurring at regularly spaced time intervals. The results of measurements are compared with the mathematical model.