TEMPERATURE AND LIGHT AS FACTORS INFLUENCING THE RATE OF SWIMMING OF LARVÆ OF THE MUSSEL CRAB, PINNOTHERES MACULATUS SAY

Abstract

Temp. and light were important factors in determining the rate of locomotion of larvae. Velocities were obtained over the range 13.4-27.0[degree] C, in directional light of constant intensity, and also over a range of intensities from 0.093 to 93.0 meter candles at constant temperatures. The velocity of progression was related to the light intensity according to the expression log V = k log I[long dash]C. This treatment yielded rectilinear graphs which were convenient for comparing effects of temp. and intensity of illumination.