Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41598-021-91815-x
Title: Numerical tests of magnetoreception models assisted with behavioral experiments on American cockroaches
Authors: Lee, Kai Sheng
Dumke, Rainer 
Paterek, Tomasz 
Issue Date: 9-Jun-2021
Publisher: Nature Research
Citation: Lee, Kai Sheng, Dumke, Rainer, Paterek, Tomasz (2021-06-09). Numerical tests of magnetoreception models assisted with behavioral experiments on American cockroaches. Scientific Reports 11 (1) : 12221. ScholarBank@NUS Repository. https://doi.org/10.1038/s41598-021-91815-x
Rights: Attribution 4.0 International
Abstract: Many animals display sensitivity to external magnetic field, but it is only in the simplest organisms that the sensing mechanism is understood. Here we report on behavioural experiments where American cockroaches (Periplaneta americana) were subjected to periodically rotated external magnetic fields with a period of 10 min. The insects show increased activity when placed in a periodically rotated Earth-strength field, whereas this effect is diminished in a twelve times stronger periodically rotated field. We analyse established models of magnetoreception, the magnetite model and the radical pair model, in light of this adaptation result. A broad class of magnetite models, based on single-domain particles found in insects and assumption that better alignment of magnetic grains towards the external field yields better sensing and higher insect activity, is shown to be excluded by the measured data. The radical-pair model explains the data if we assume that contrast in the chemical yield on the order of one in a thousand is perceivable by the animal, and that there also exists a threshold value for detection, attained in an Earth-strength field but not in the stronger field. © 2021, The Author(s).
Source Title: Scientific Reports
URI: https://scholarbank.nus.edu.sg/handle/10635/231937
ISSN: 2045-2322
DOI: 10.1038/s41598-021-91815-x
Rights: Attribution 4.0 International
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