No alignment of cattle along geomagnetic field lines found
@article{Hert2011NoAO, title={No alignment of cattle along geomagnetic field lines found}, author={J. De Hert and L. Jelinek and Luděk Pek{\'a}rek and Anna Pavlicek}, journal={Journal of Comparative Physiology A}, year={2011}, volume={197}, pages={677-682} }
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…
16 Citations
Further support for the alignment of cattle along magnetic field lines: reply to Hert et al.
- PhysicsJournal of Comparative Physiology A
- 2011
It is shown that cattle significantly align their body axes in North–South direction on pastures analyzed by Hert and co-authors and by using aerial Google Earth images with good resolution, that the magnetic alignment is more pronounced in resting than in standing cattle.
An experimental approach in revisiting the magnetic orientation of cattle
- PhysicsPloS one
- 2018
The experimental and observational findings do not support previously published suggestions on the magnetic south-north alignment in non-homing, non-migrating terrestrial mammals.
Geomagnetic Field and Animal Orientation
- Biology
- 2018
A large variety of animals possess a magnetic sense. Migratory birds use magnetic clues to find their way south in fall and north in spring. Salamanders, frogs, use the magnetic field for orientation…
Bees, Butterflies And Wildlife: Research On Electromagnetic Fields And The Environment
- Environmental Science
- 2019
“The electromagnetic radiation standards used by the Federal Communications Commission (FCC) continue to be based on thermal heating, a criterion now nearly 30 years out of date and inapplicable…
Possible causes of aberrations in adverse grouping behavior of dairy cows: A field study.
- MedicineJournal of dairy science
- 2021
The aim for the study was to study potential factorssuch as magnetic fields and other factors such as barn climate and insect burden for adverse grouping behavior of dairy cows in the barn and identify risk factors that could lead to adverse behavior of the cows.
Authors’ response
- Journal of Comparative Physiology A
- 2011
(a) The vector data: for sampling the vector data (cows with recognized head position), only pictures with very good resolution were used. Shadows were never used in our analysis. Regarding the claim…
Reanalysis of an oft-cited paper on honeybee magnetoreception reveals random behavior
- BiologyJournal of Experimental Biology
- 2018
A reanalysis of the results of a well-cited study on honeybee magnetoreception using a random number generator demonstrates that the conclusions of the original paper were due to incorrect data analyses.
An application of an optimal statistic for characterizing relative orientations
- Physics
- 2018
We present the projected Rayleigh statistic (PRS), a modification of the classic Rayleigh statistic, as a test for non-uniform relative orientation between two pseudo-vector fields. In the…
References
SHOWING 1-10 OF 11 REFERENCES
Magnetic alignment in grazing and resting cattle and deer
- PhysicsProceedings of the National Academy of Sciences
- 2008
The magnetic alignment in large mammals based on statistically sufficient sample sizes is revealed and open horizons for the study of magnetoreception in general and are of potential significance for applied ethology (husbandry, animal welfare).
Extremely low-frequency electromagnetic fields disrupt magnetic alignment of ruminants
- PhysicsProceedings of the National Academy of Sciences
- 2009
It is shown that extremely low-frequency magnetic fields generated by high-voltage power lines disrupt alignment of the bodies of these animals with the geomagnetic field, and the demonstrated reaction to weak ELFMFs implies effects at the cellular and molecular levels.
Evidence that pigeons orient to geomagnetic intensity during homing
- Physics, GeologyProceedings of the Royal Society B: Biological Sciences
- 2007
This study describes a novel behaviour which provides strong evidence that pigeons when homing detect and respond to spatial variation in the Earth's magnetic field—information of potential use for navigation.
Magnetic Orientation in Animals
- GeologyZoophysiology
- 1995
This text details animal orientation with the help of information from the geomagnetic field. It reviews the magnetic effects on spatial behaviour in the various groups of the animal kingdom from…
The physics and neurobiology of magnetoreception
- PhysicsNature Reviews Neuroscience
- 2005
Despite recent advances, magnetoreceptors have not been identified with certainty in any animal, and the mode of transduction for the magnetic sense remains unknown.
Exposure to electromagnetic fields and the risk of childhood leukaemia: a review.
- MedicineRadiation protection dosimetry
- 2008
Recent large-scale systematic studies in Korea and Germany show no association between exposure to radio frequency electromagnetic fields emitted from broadcast towers and childhood leukaemia risk.
Directional Statistics, I
- Mathematics
- 2011
In many natural and physical sciences the measurements are directions—either in two- or three-dimensions. This chapter briefly introduces this novel area of statistics, and provides a good starting…