title: [Circadian rhythm of the dropping of engorged larvae in 2 species of ixodid ticks (Ixodidae) and its photoperiodic entrainment].
abstract: Daily rhythm of detachment of engorged larvae of Ixodes ricinus L. and Hyalomma anatolicum Koch is regulated by photoperiod. In photoperiodic conditions (16--20 hours of light p. d.) the maximum of detachment in H. anatolicum occurs at the beginning of photophase (the first 4--8 hours), but in I. ricinus it occurs at the second part of photo-phase (12--16 hours after the light is on). The rhythm of detachment is regulated according to the processes of endogenous circadian nature which are maintained in the continuous light and are species-specific. The phase entrainment of detachment in continuous light is also influenced by biorhythms of hosts.
mesh_terms: D000818:Animals; D002417:Cattle / Q000469:parasitology; D002940:Circadian Rhythm; D005260:Female; D007814:Larva / Q000469:parasitology; D008027:Light; D051379:Mice; D013045:Species Specificity; D013987:Ticks / Q000469:parasitology*; D013997:Time Factors; D014586:USSR
vernacular_title: Sutochnyĭ ritm otpadeniia nasosavshikhsia lichinok u dvukh vidov iksodovykh kleshcheĭ (Izodidae) i ego fotoperiodicheskaia nastroĭka.