[The behaviour of Lymnaea (Galba) truncatula Müler non- or infested ny Fasciola hepatica L. in the presence of predators (author's transl)].

Experimental study of behavior of Lymnaea truncatula in the presence of terrestrial or aquatic predators. The presence of predators disturbes the daily rhythm connected with amphibious conditions of non-infested snails. In half-immersed habitats, Zonitoides nitidus, terrestrial predator, produces a progressive immersion of surviving snails; but the latter run away to dry zones in drying habitats or with aquatic predators. The infested snails (phasis E 1) present the same reactions of behaviour in presence of predators, but the reactions are more limited.