To study the possible effects of mobile phone base station irradiation on tadpoles.
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.
Exposure | Parameters |
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Exposure 1: 648–2,155 MHz |
|
Frequency | 648–2,155 MHz |
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Type | |
Exposure duration | continuous for 2 months (from the egg phase until prior to metamorphosis) |
Additional info | fields of several mobile phone services (GSM, DCS, UMTS) |
Exposure source |
|
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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. |
Measurand | Value | Type | Method | Mass | Remarks |
---|---|---|---|---|---|
electric field strength | 1.8 V/m | minimum | measured | - | - |
electric field strength | 3.5 V/m | maximum | measured | - | - |
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.
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