http://www.cnr.it/ontology/cnr/individuo/prodotto/ID57837

Moon orientation on moonless nights (Articolo in rivista)

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Anno

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Ugolini A., Castellini C., Mercatelli L. (2007)
Moon orientation on moonless nights
in Animal behaviour (Print)
(literal)

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CNR - Istituto Nazionale di Ottica Applicata , Largo E. Fermi 6, 50125 Firenze, Italy; Dipartimento di Biologia Animale e Genetica, Università di Firenze (literal)

Titolo

Abstract

The sandhopper Talitrus saltator is kmown to use sun and moon compasses to return to the band of wet sand on a beach. The two compass systems are based on separate chronometric mechanisms that compensate for the azimuthal movement of the two astronomical cues. The aim of our research was to test whether the sandhopper's time-compensating mechanism for lunar compass orientation continues to work during the new moon phase (i.e. when the moon is not visible). Ours tests were carried out in a confined environment under the natural sky and in the laboratory under artificial light, in both the full and new moon phases. Sandhoppers released in sea water headed towards the expected land direction of their home beach using the natural or atificial moon as a compass cue independently of the moon's natural phase, including the new moon phase. The sandhoppers' chronometric mechanism that compensates for the moon's azimuthal motion thus works continuosly, even during the phase when the actual moon is never visible. This could be based on spatiotemporal interpolation between visible moon positions. (literal)

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