Extremely low-frequency electromagnetic fields disrupt magnetic alignment of ruminants

Area of Science:

• Zoology
• Biophysics
• Environmental Science

Background:

• Large mammals, including cattle and deer, exhibit a tendency to align their body axes with the geomagnetic North-South direction during rest and grazing.
• The underlying biological mechanisms responsible for this magnetoreception behavior are not yet fully understood.

Purpose of the Study:

• To investigate the potential disruption of geomagnetic alignment in cattle and deer by extremely low-frequency magnetic fields (ELFMFs).
• To explore the behavioral responses of large mammals to artificial magnetic field exposure.

Main Methods:

• Observational field studies on cattle and roe deer pastures located near high-voltage power lines.
• Analysis of animal body orientation in relation to geomagnetic field direction and proximity to power line conductors.
• Controlled exposure experiments with cattle to varying magnetic field strengths and directions.

Main Results:

• Cattle and roe deer body orientation was random on pastures situated under or near power lines, indicating disrupted alignment.
• Distinct alignment patterns were observed in cattle exposed to power line magnetic fields, varying with magnetic field direction.
• The disruptive effect of ELFMFs on animal body alignment decreased with increasing distance from power line conductors.

Conclusions:

• The study provides evidence for magnetic sensation and magnetoreception in large mammals.
• Demonstrates an overt behavioral reaction in vertebrates to weak extremely low-frequency magnetic fields.
• Suggests that observed behavioral changes imply underlying cellular and molecular effects of magnetic fields.