...Alice Ciofini; Luca Mercatelli; Takahiko Hariyama; Alberto Ugolini ABSTRACT The sandhopper Talitrus saltator relies on both the sun and the moon compasses to return to the belt of damp sand on the beach in which it lives buried during the day. In addition to the sun, the gradient of radiance...

... their bearing relative to the sea–land axis. Adult individuals of Talitrus saltator were released in a transparent Plexiglas bowl, horizontally placed between four walls with a pattern of vertical black and white stripes. The orientation of one pair of opposite walls was south–north, orthogonal to the sea–land...

...Alberto Ugolini; Giuditta Galanti; Luca Mercatelli SUMMARY To return to the ecologically optimal zone of the beach, the sandhopper Talitrus saltator (Montagu) maintains a constant sea–land direction based on the sun and moon compasses. In this study, we investigated the role of the skylight...

... of different cations to the sea–land directional choice of Talitrus saltator (Crustacea, Amphipoda) by the sun compass orientation mechanism. Results of releases carried out in basic seawater selectively deprived of Ca 2+ , Mg 2+ or K + and containing the same concentration of Na + indicate that only...

...Alberto Ugolini; Silvia Somigli; Luca Mercatelli SUMMARY The use of the landscape in the zonal recovery of Talitrus saltator (Montagu) was demonstrated in the past using natural and artificial landscapes. Here we evaluate the importance of colour in the landscape orientation of sandhoppers. Adult...

...Alberto Ugolini; Bruno Tiribilli; Vieri Boddi SUMMARY Experiments on solar orientation were conducted with adult amphipods( Talitrus saltator ) subjected to a reduction and/or phase shift of the hours of light (L) or dark (D) with respect to the natural photoperiod: 15 h:9 h L:D (controls), 15 h:9...