...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...

... of seawater and it has been demonstrated that sandhoppers tested under the sun in diluted seawater (3.5‰) head seaward, instead of going landward as expected. Therefore, the variation in seawater salinity (from 35‰ to 3.5‰) influences their directional choice. This paper investigates the contribution...

...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...

... h inverted (i.e. phase-shifted by 12 h and tested with the sun during the subjective night), 4 h:20 h, 20 h:4 h inverted. The sandhoppers were released in a confined environment, and individual orientation angles were recorded. The results confirm the continuous operation, through the entire 24-h...