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

摘要: 1. Larvae of Pinnotheres maculatus Say are shown to be satisfactory animals for the study photokinesis. The velocity swimming is found greatly influenced by temperature and light intensity. Age, although not carefully investigated at present, also an important contributing factor in determining rate locomotion.2. A series measurements effect on swimming, a constant intensity, showed applicability Arrhenius equation, yielded values µof 12,800 above 18.5° 16,900 below C.3. larvae sensitive only small range intensities. At temperatures between 20-25° C., maximum possible attained intensities 10 25 meter candles. When plotted against intensity smooth curve obtained. same data when treated empirically according equation log V = k I – C, yields essentially rectilinear graphs which more ...