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Fig. 2. Jumping behavior of Amynthas gracilis exposed to UV-A or UV-B
expressed as the percentage of individuals showing this behavior. When the
earthworms were exposed to less than 1000 J m-2 of either UV-A or
UV-B, no individuals jumped. But after exposure to higher doses, abnormal
jumping behavior appeared. As the dosages increased, the cumulative percentage
of jump individuals was significant increased (
2 test,
N=30, P<0.001).