Digenean larvae--the cause and beneficiaries of the changes in host snails' thermal behavior.

摘要: Parasite-induced changes in host’s thermal preferences not only can be interpreted as a physiological defense response of the host but also represent pathological manifestation parasite. Both may become established host-parasite relationships if they are beneficial for at least one counterparts. This study investigates parasite-induced thermoregulatory behavior first intermediate hosts Digenea (i.e. Lymnaea stagnalis and Planorbarius corneus), infected with Notocotylidae or Echinostomatidae larvae. The investigated parasite species developed different transmission strategies outside body snail, which imply effect on their hosts. Notocotylus attenuatus L. ephemera P. corneus produce symptoms anapyrexia, prolonging lifespan By contrast, Echinoparyphium aconiatum Echinostoma spiniferum interfere defensive snails, causing accelerated death. results laboratory research indicate that snails all trematodes facilitate parasites environment.