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Movement alterations of Physa gyrina when parasitized.

dc.contributor.authorHerstein, Richard J.en_US
dc.coverage.spatialAlanson Ditchen_US
dc.coverage.spatialUMBS Campusen_US
dc.date.accessioned2007-06-14T23:28:13Z
dc.date.available2007-06-14T23:28:13Z
dc.date.issued2004en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/55018
dc.description.abstractPhysa gyrina are a common freshwater snail that serves as the intermediate host for many digenetic trematode parasites. For this study, Physa gyrina were collected from Alanson Ditch, Emmet County, Michigan, and put into a light box so that infected snails would shed their cercariae. The infected snails were then separated from the non-infected snails. A test of movement was carried out on the infected and non-infected snails by placing them in a 30-gallon aquarium and monitoring their movement. Infected snails were compared to non-infected snails. The hypotheses were that infected snails would be larger in size and move slower than non-infected snails. The data showed that non-infected Physa gyrina moved further laterally, than infected ones (T-test, p = 0.054) and that infected Physa gyrina moved faster overall than non-infected Physa gyrina (T-test, p = 0.066). There was no signficant variation of average overall shell volume (mm3) between infected and non-infected Physa gyrina (mean standard deviation = 29mm), (T-test, p = 0.354, n infected = 10, n uninfected = 14). There was also no significant variation of vertical distance traveled between infected and non-infected Physa gyrina (T-test, p x = 0.924, p y = 0.223). Futher studies should use a larger sample size, conduct research over a longer period of time, investigate the location and amount of the parasite on the snail, and conduct the trials in a more natural setting.en_US
dc.format.extent773530 bytes
dc.format.extent3144 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.relation.haspartGraphen_US
dc.relation.haspartTable of Numbersen_US
dc.subjectParasitologyen_US
dc.subject.otherINVERTEBRATESen_US
dc.subject.otherSNAILSen_US
dc.subject.otherAQUATICen_US
dc.subject.otherPHYSAen_US
dc.subject.otherPARASITESen_US
dc.subject.otherTREMATODESen_US
dc.subject.otherBEHAVIORen_US
dc.subject.otherINFECTIONen_US
dc.titleMovement alterations of Physa gyrina when parasitized.en_US
dc.typeWorking Paperen_US
dc.subject.hlbsecondlevelNatural Resource and Environmenten_US
dc.subject.hlbtoplevelScienceen_US
dc.contributor.affiliationumBiological Station, University of Michiganen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/55018/1/3459.pdfen_US
dc.description.filedescriptionDescription of 3459.pdf : Access restricted to on-site users at the U-M Biological Station.en_US
dc.owningcollnameBiological Station, University of Michigan (UMBS)


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