Studientyp:
Medizinische/biologische Studie
(experimentelle Studie)
Exposure to extremely low frequency electromagnetic fields alters the behaviour, physiology and stress protein levels of desert locusts
med./bio.
[Exposition bei extrem niederfrequenten elektromagnetischen Feldern verändert das Verhalten, die Physiologie und den Stressprotein-Gehalt bei der Wüstenheuschrecke]
Es wurde ein gut untersuchtes Insekt verwendet, um die Wirkungen von starken Magnetfeldern in der Nähe von Hochspannungsfreileitungen auf fliegende Insekten zu untersuchen. Die Heuschrecken wurden in folgende Gruppen eingeteilt: Exposition bei einem Magnetfeld mit einer magnetischen Flussdichte von 1) 1 mT, 2) 4 mT oder 3) 7 mT. In den einzelnen Tests wurde für jede Expositions-Gruppe eine separate Schein-Expositions-Gruppe verwendet. Verschiedene Gruppen mit unterschiedlichen Anzahlen an Heuschrecken wurden in den einzelnen Tests verwendet:
Muskelkraft: 12 Heuschrecken in Gruppe 1 und in der Schein-Expositions-Gruppe, 24 Heuschrecken in Gruppe 2 und in der Schein-Expositions-Gruppe, 24 Heuschrecken in Gruppe 3 und 26 in der entsprechenden Schein-Expositions-Gruppe
circular glass chamber (15 cm diameter x 7.5 cm height)
Aufbau
a coil of 20 cm diameter and composed of 282 turns of insulated copper wire produced a homogeneous, vertical field; glass chamber with 6 locusts was placed inside the coil; temperature during exposure was monitored (at 1 mT, no change was observed (room temperature, 21°C), at 4 mT it was 24.5°C ± 1°C and at 7 mT it was 29.3°C ± 1°C)
during sham exposure, a hot plate under the coil was used to ensure the same temperature in the glass chamber as during exposure (not necessary for 1 mT)
Kognitions-/Verhaltensendpunkte: Bewegungsaktivität (Bewegung von einem Ende eines Tunnels zum anderen Ende mit anderen Heuschrecken, Nahrung und Licht als anziehende Reize; Anzahl der Tiere, die das andere Ende des Tunnels erreichen, und zurückgelegte Strecke/Zeit; Video-Aufzeichnung)
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