Tenebrio beetles use magnetic inclination compass.

Die Naturwissenschaften
Martin VáchaTereza Půzová

Abstract

Animals that guide directions of their locomotion or their migration routes by the lines of the geomagnetic field use either polarity or inclination compasses to determine the field polarity (the north or south direction). Distinguishing the two compass types is a guideline for estimation of the molecular principle of reception and has been achieved for a number of animal groups, with the exception of insects. A standard diagnostic method to distinguish a compass type is based on reversing the vertical component of the geomagnetic field, which leads to the opposite reactions of animals with two different compass types. In the present study, adults of the mealworm beetle Tenebrio molitor were tested by means of a two-step laboratory test of magnetoreception. Beetles that were initially trained to memorize the magnetic position of the light source preferred, during the subsequent test, this same direction, pursuant geomagnetic cues only. In the following step, the vertical component was reversed between the training and the test. The beetles significantly turned their preferred direction by 180 degrees. Our results brought until then unknown original findings that insects, represented here by the T. molitor species, use-in contra...Continue Reading

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Citations

Feb 9, 2012·Bulletin of Entomological Research·T Válková, M Vácha
Feb 5, 2010·Journal of the Royal Society, Interface·Thorsten RitzWolfgang Wiltschko
Jan 29, 2010·Journal of the Royal Society, Interface·Eliane WajnbergDarci M S Esquivel
Nov 22, 2015·Behavioural Processes·Elena A OsipovaViacheslav V Krylov
Aug 2, 2012·International Journal of Radiation Biology·Dajana TodorovićBranka Janać
Sep 17, 2017·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Veronika LambinetGerhard Gries
Oct 20, 2009·The Journal of Experimental Biology·Martin VáchaMarkéta Kvícalová
Aug 8, 2021·Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life·Weronika ErdmannŁukasz Kaczmarek
Sep 4, 2021·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Roswitha Wiltschko, Wolfgang Wiltschko

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