ETHOLOGY OF THE TREMATODE CERCARIAE SCHISTOSOMA TURKESTANICA SKRJABIN, 1913, WHEN EMITTED FROM NATURALLY INVASIVE LYMNAEA AURICULARIAL MOLLUSKS, 1758

The characteristics of ethnological characteristics of cercaria trematodes Schistosoma turkestanica Skrjabin, 1913 are detailed with emission from naturally invasive intermediate hosts, Lymnaea auricularia mollusks L., 1758.The modern correct species name of the dioecious trematodes of the Schistosomatidae family, the parasitic circulatory system of cattle in the Central Asian region, should be considered Schistosoma turkestanica Skrjabin, 1913.Spontaneous emission of furcocercarium Sch. turkestanica from invasive L. auricularia, can occur in various parts of the mollusk's body surface. The process of the release of the larva into the environment proceeds according to the original algorithm, accompanied by its morpho- functional adaptations, taking 15–17 seconds. The active initial transient phase of piercing “from inside-out” in the first 2–3 seconds is ensured by the body of the larva, which is drawn in length, taking the shape of a needle. Then, the tail of the cercaria is released from the puncture site. Tissue damage in the area of release of the larvae was not visually marked.Fourcocarii Sch. turkestanica have positive photo– and negative geotaxis, which modulate continuous two-phase, mainly vertical mobility, ensuring their long-term stay in the plankton state in the surface layers of water. Features of cervary ethology increase the likelihood of targeted active contact and the effectiveness of the attack of definitive hosts of the trematodes.