The pond snail,
, can locomote on its back utilizing the surface tension of the water. We have called this form of movement ‘back-swimming’. In order to perform this behavior, the snail must flip itself over on its back so that its foot is visible from above. Little is known about the mechanism of this back-swimming. As a first step for the elucidation of this mechanism, we measured the speed of back-swimming of
at the different times of the day. They back-swam significantly faster in the morning than just before dark. These data are consistent with our earlier findings on circadian-timed activity pattern in
appear to secrete a thin membrane-like substance from their foot that may allow them to back-swim. To confirm the existence of this substance and to examine whether this substance is hydrophobic or hydrophilic, we applied a detergent onto the foot during back-swimming. A single drop of 1% Tween 20 drifted
away that were still kept at the water surface. These results suggest that
secrete a hydrophobic substance from their foot that floats to the water surface allowing
Chono, K., Fujito, Y., Ito, E. (2002) Non-ocular dermal photoreception in the pond snail
Brain Res. 951
Ito E., 'Non-ocular dermal photoreception in the pond snail Lymnaea stagnalis' (2002) 951Brain Res.: 107-112.
Ito E.Non-ocular dermal photoreception in the pond snail Lymnaea stagnalisBrain Res.2002951107112)| false
Wagatsuma, A., Sugai, R., Chono, K., Azami, S., Hatakeyama, D., Sadamoto, H., Ito, E. (2004) The early snail acquires the learning, comparison of scores for conditioned taste aversion between morning and afternoon.
Acta Biol. Hung. 55
Ito E., 'The early snail acquires the learning, comparison of scores for conditioned taste aversion between morning and afternoon' (2004) 55Acta Biol. Hung.: 149-155.
Ito E.The early snail acquires the learning, comparison of scores for conditioned taste aversion between morning and afternoonActa Biol. Hung.200455149155)| false
Csányi, Vilmos (Göd)Dudits, Dénes (Szeged)Falus, András (Budapest)Fischer, Ernő (Pécs)Gábriel, Róbert (Pécs)Gulya, Károly (Szeged)Gulyás, Balázs (Stockholm)Hajós, Ferenc (Budapest)Hámori, József (Budapest)Heszky, László (Gödöllő)Hideg, Éva (Szeged)E. Ito (Sanuki)Janda, Tibor (Martonvásár)Kavanaugh, Michael P. (Missoula)Kása, Péter (Szeged)Klein, Éva (Stockholm)Kovács, János (Budapest)Brigitte Mauch-Mani (Neuchâtel)Nässel, Dick R. (Stockholm)Nemcsók, János (Szeged)Péczely, Péter (Gödöllő)Roberts, D. F. (Newcastle-upon-Tyne)Sakharov, Dimitri A. (Moscow)Singh, Meharvan (Fort Worth)Sipiczky, Mátyás (Debrecen)Szeberényi, József (Pécs)Székely, György (Debrecen)Tari, Irma (Szeged)Vágvölgyi, Csaba (Szeged),L. Zaborszky (Newark)