The sandhopper Talitrus saltator has an endogenous activity rhythm with a circadian periodicity. It is well known for its ability to compensate for the apparent movement of the sun during its migrations along the sea-land axis of the beach. Both chronometric mechanisms are entrained by the natural LD photoperiod. Using actographic recordings and tests of solar orientation of individuals kept under an LD 12:12 clock-shifted cycle, after 1-13 days of treatment, we demonstrate that the timing mechanism of activity rhythm and the chronometric mechanism underlying the sun compass are the same.
Locomotor activity rhythm and sun compass orientation in the sandhopper Talitrus saltator are related / Alberto, Ugolini; Silvia, Somigli; Pasquali, Vittorio; Renzi, Paolo. - In: JOURNAL OF COMPARATIVE PHYSIOLOGY. A, NEUROETHOLOGY, SENSORY, NEURAL, AND BEHAVIORAL PHYSIOLOGY. - ISSN 0340-7594. - 193:12(2007), pp. 1259-1263. [10.1007/s00359-007-0277-z]
Locomotor activity rhythm and sun compass orientation in the sandhopper Talitrus saltator are related
PASQUALI, Vittorio;RENZI, Paolo
2007
Abstract
The sandhopper Talitrus saltator has an endogenous activity rhythm with a circadian periodicity. It is well known for its ability to compensate for the apparent movement of the sun during its migrations along the sea-land axis of the beach. Both chronometric mechanisms are entrained by the natural LD photoperiod. Using actographic recordings and tests of solar orientation of individuals kept under an LD 12:12 clock-shifted cycle, after 1-13 days of treatment, we demonstrate that the timing mechanism of activity rhythm and the chronometric mechanism underlying the sun compass are the same.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
