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Electric field was measured using a "Nuova Elettronica" device with 10% sensitivity, from a unidirectional antenna. The measurements were made in the vicinity of the nests under similar conditions with the antenna directed toward the BTSantenna in line of sight.
effects on the reproductive system: breeding success (total productivity/number of youngs by each couple, including nests with 0 chicks; partial productivity/number of youngs by each couple, excluding nests with 0 chicks) (telescope observation)
The total productivity in the nests located within 200 meters of antennae, was 0.86 ± 0.16 and the partial productivity was 1.44 ± 0.16. For those located further than 300 m, the total productivity was practically doubled, with an average of 1.6 ± 0.14. Partial productivity was 1.65 ± 0.13. Twelve nests (40%) located within 200 m of antennae never had chicks, while only one located further than 300 m had no chicks.