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ScientificWorldJournal
2004 Oct 20;4 Suppl 2:41-7. doi: 10.1100/tsw.2004.177.
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Influence of 50-Hz electromagnetic field on anurian (Xenopus laevis) metamorphosis.
Grimaldi S
,
Lisi A
,
Reiti S
,
Manni V
,
Ledda M
,
Giuliani L
.
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In this study, we show the effect of a 1-mT magnetic field AC at 50 Hz on Xenopus laevis tadpole populations. In the course of a 65-day exposure to the field, tadpole survival showed a small, but significant, decrease (p < 0.0004), together with a striking parallel 6-day shift in tadpole maturation frequency and a significant impairment of their metamorphosis. Particularly, metamorphosis was successful for 85% of individuals in the unirradiated tadpole population and for 45% of individuals in the irradiated tadpole population, respectively.
FIGURE 1. MF dependence of tadpole survival rate. (o) Control population made by unirradiated individuals maintained for 65
days outside the SLD; (�) experimental population made by individuals maintained for 65 days inside the SLD. The points represent
the mean of four sets of experiments.
FIGURE 2. MF dependence of daily tadpole metamorphosis rate. As daily rate of metamorphosis, the number of individuals
undergoing metamorphosis in 24 h was taken. (o) Control population made by unirradiated individuals maintained outside the SLD;
(�) experimental population made by individuals maintained inside the SLD. The points represent the mean of four sets of
experiments.
FIGURE 3. MF dependence of complete metamorphosis in the total tadpole population. The columns show the percentage of
individuals that completed their metamorphosis during the experimental time. (1) Unirradiated (control) tadpoles; (2) irradiated
tadpoles. The data represent the mean of four sets of experiments.
