[The effect of different concentrations of surface-active substances on the size of the circadian rations and on the duration of food passage in Lymnaea stagnalis infected with Echinostoma revolutum parthenitae]. / Vliianie razlichnykh kontsentratsii poverkhnostno-aktivnykh veshchestv na velichinu sutochnykh ratsionov i prodolzhitel'nost' prokhozhdeniia pishchi u Lymnaea stagnalis, invazirovannogo partenitami Echinostoma revolutum.

In solutions of the detergent "Kristall" (0.9 and 90 mg.l.-1) there were established statistically reliable differences in the values of day rations and duration of food passing both in infected and free from infection molluscs. In noninfected individuals day rations increase 1.5 to 5 times and the duration of food passing 5 to 7 times. In infected animals the value of day rations decrease and the duration of food passing increases less intensively.