The experiment was performed in Valladolid (Spain). The tadpoles were placed in two tanks with oxygen and food every day, which were set out on the fifth floor terrace at a distance of 140 meters from several base stations. Two groups were used (exposure and control group, each group n= 70). The experiment lasted two months, from the egg phase until an advanced phase of tadpole prior to metamorphosis.
|Distance between exposed object and exposure source||140 m|
|Setup||base stations antennas on roof of an eight story building; exposed frogs kept in tanks opposite of the base station antennas on a fifth floor terrace; sham exposure group placed inside a Faraday cage|
|Sham exposure||A sham exposure was conducted.|
The data showed in the exposed group low coordination of movements, an asynchronous growth (resulting in both big and small tadpoles) and a high mortality (90%). In the control group under the same conditions but inside a Faraday cage, the coordination of movements was normal, the development was synchronous, and the mortality rate was 4.2%.
These findings indicate that exposure to mobile phone base stations in a real situation may affect the development and may cause an increase in mortality of exposed tadpoles.