Figure 4.

Mortality differs as a function of shift interval in the springtail (Folsomia candida). At different intervals (every 2, 3, …, or 11 days), a regimen of quasi-optimal and non-optimal ambient temperatures (alternating at 12-hour intervals) was shifted. Lifespan was lengthened rather than shortened by comparison with unshifted controls in association with shifts every 3 or 10 days, a desirable effect like that in Figure 1. Table demonstrates a desynchronized about-weekly (147-hour) but synchronized half-weekly (84-hour) pattern (9). © Halberg.