title: The reactions of Schistosoma mansoni miracidia to light.
abstract: The reactions of Schistosoma mansoni miracidia to artificial light were studied by direct observations, choice-chambers and a photographic technique, at room temperature and at 15 C. The miracidia responded positively to directed illumination, but did not aggregate in a lighted dish. Photography indicated an orthokinetic response to light intensity, but sharp changes in light intensity had no detectable effect on miracidial behavior. At the lower temperature the response to a directed light beam was almost completely inhibited and the orthokinetic response could no longer be demonstrated.
mesh_terms: D000818:Animals; D002522:Chlorocebus aethiops; D000882:Haplorhini; D008027:Light; D008124:Locomotion; D012550:Schistosoma mansoni / Q000502:physiology*; D013696:Temperature