Tenebrio beetles use magnetic inclination compass

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
Název česky Potemník moučný používá inklinační magnetický kompas.
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VÁCHA Martin DRŠTKOVÁ Dana PŮŽOVÁ Tereza

Rok publikování 2008
Druh Článek v odborném periodiku
Časopis / Zdroj Naturwissenschaften
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Obor Fyziologie
Klíčová slova Insect Tenebrio Magnetoreception Compass Inclination
Popis 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 Tenebrio molitor species, use - in contrast to another previously researched Arthropod, spiny lobster - the inclination compass.
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