Journal of Comparative Physiology A

, Volume 197, Issue 6, pp 677–682

No alignment of cattle along geomagnetic field lines found

Authors

  • J. Hert
    • Department of Anatomy, Faculty of MedicineCharles University
    • Department of Electromagnetic Field, Faculty of Electrical EngineeringCzech Technical University in Prague
  • L. Pekarek
    • National Reference Laboratory for Electromagnetic FieldNational Institute of Public Health
  • A. Pavlicek
    • Department of System Analysis, Faculty of Informatics and StatisticsUniversity of Economics
Original Paper

DOI: 10.1007/s00359-011-0628-7

Cite this article as:
Hert, J., Jelinek, L., Pekarek, L. et al. J Comp Physiol A (2011) 197: 677. doi:10.1007/s00359-011-0628-7

Abstract

This paper presents a study of the body orientation of domestic cattle on free pastures in several European states, based on the Google satellite photographs. In sum, 232 herds with 3,412 individuals were evaluated. Two independent groups participated in our study and came to the same conclusion that in contradiction to the recent findings of other researchers, no alignment of the animals and of their herds along geomagnetic field lines could be found. Several possible reasons for this discrepancy should be taken into consideration: poor quality of Google satellite photographs, difficulties in determining the body axis, selection of herds or animals within herds, lack of blinding in the evaluation, possible subconscious bias, and, most importantly, high sensitivity of the calculated main directions of the Rayleigh vectors to some kind of bias or to some overlooked or ignored confounder. This factor could easily have led to an unsubstantiated positive conclusion about the existence of magnetoreception.

Keywords

MagnetoreceptionMagnetic alignmentCattle in magnetic fieldMagnetic senseStatistical evaluation

Supplementary material

359_2011_628_MOESM1_ESM.pdf (503 kb)
Supplementary material (504 kb)

Copyright information

© Springer-Verlag 2011