Artificial light and sun compass orientation in the sandhopper Talitrus saltator (Crustacea, Amphipoda)
Anno: 1998
Autori: Ugolini A., Tiribilli B., Castellini C.
Affiliazione autori: Dipartimento di Biologia Animale e Genetica, Università di Firenze and Centro SFET-CNR, Via Romana 17, 50125 Firenze, Italy;
Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: Experiments on compass orientation under artificial light were conducted with adult individuals of Talitrus saltator. The aim was to reproduce in the laboratory an orientation based on the sun compass corresponding to that recorded in conditions of the true sun and sky. This was obtained by the creation within an opaque Plexiglas dome of a scenario that permitted variation of the brightness of the artificial sky and sun. The results show that it is possible to obtain sun compass orientation corresponding to the natural situation even in an artificial environment. It can be concluded that sandhoppers identify an artificial light source as the sun if the artificial sky is also illuminated and if the intensities of the artificial sun and sky exceed certain threshold values (1.13 and 10 mu W cm(-2), respectively). The results of other experiments under the natural blue sky with an artificial sun and with the real sun attenuated are discussed.
Giornale/Rivista: JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
Volume: 182 (1) Da Pagina: 43 A: 50
Parole chiavi: artificial light; vision; orientation; sun; compass; sandhoppers; Citazioni: 13dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui