. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 204 M. S. DAVIES ET ââ¢â .. o â â 2038 .. o â -IIIF EMF-exposed Sham-exposed 0 04 Log n+1 [Ca] (mM) Figure 6. Motility response ot Ampliora cojfeaefonnis in logarith- mic growth to [Ca]. (A) Present results using five strains of .4. cojfeaeformis (bars are SE. n = 3). (B) Results of Smith ei al. (1987). including an EMF-induced effect for comparison. (~30% increase in motility) was shown by a 1-day-old culture on plates with mM added Ca (Fig. 9). Material from reserve stocks was again pre-incubated
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 204 M. S. DAVIES ET ââ¢â .. o â â 2038 .. o â -IIIF EMF-exposed Sham-exposed 0 04 Log n+1 [Ca] (mM) Figure 6. Motility response ot Ampliora cojfeaefonnis in logarith- mic growth to [Ca]. (A) Present results using five strains of .4. cojfeaeformis (bars are SE. n = 3). (B) Results of Smith ei al. (1987). including an EMF-induced effect for comparison. (~30% increase in motility) was shown by a 1-day-old culture on plates with mM added Ca (Fig. 9). Material from reserve stocks was again pre-incubated at Bh = 20 /yT, Bv = 0 ^T. this time for at least 3 months. Strain #2038 again declined, but lllg grew as expected and was used in the following experiments (each repeated five times). Under ion cyclotron resonance conditions, each ex- periment showed an EMF effect (Fig. 10). the maximum difference in motility between exposed and sham-exposed cells occurring at mM added Ca (mean increase = + ± SE, n = 15). No experiment at Ca ion cyclotron resonance conditions failed to show an EMF effect (Fig. 10), although the percentage shift in motility was smaller, and the |Ca| at which an effect occurred was higher, than in the other experiments using pre-incubation reported above. The EMF effect was abolished when diatoms were grown in the earth's field prior to experimentation (Fig. 11; mean increase in motility at mM added Ca = ± SE, n = 15) and when the coils were not energized during experimentation (Fig. 12; mean increase = ± SE, n = 15). The effect was also abolished when even harmonics at 8 Hz (mean increase = ± SE, n = 15) and 32 Hz (mean increase = ± SE. n = 15) were used (Figs. 13 and 14). Experimentation was recommenced after a break of 1 month and subsequent experiments, under conditions above that produced an effect, indicated no EMF effect. Perfusion experiments (i) Effects of Ca levels on mot
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