Patterns of multiparasitism and consequences of co-infection in fathead minnows (Pimephales promelas)

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dc.contributor.authorHirtle, Sarah Valerie
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorGoater, Cameron P.
dc.date.accessioned2022-03-09T16:27:35Z
dc.date.available2022-03-09T16:27:35Z
dc.date.issued2021
dc.degree.levelMastersen_US
dc.description.abstractIndividual hosts are often infected with multiple parasite species or strains simultaneously. Co-occurring parasites can profoundly impact each other and their hosts via interspecific interactions. To further our understanding of co-infection in wildlife, I censused the parasite communities of fathead minnows (Pimephales promelas) from southern Alberta over three years. Nearly all minnows were co-infected, and the larval trematodes Ornithodiplostomum ptychocheilus and Ornithodiplostomum sp. co-occurred more frequently than expected by chance. I exposed minnows to cercariae of these species to evaluate the effects of intensity dependence and co-infection on parasite development. While negative intensity-dependent growth occurred only for O. ptychocheilus, both species were significantly smaller post-encystment in co-infections than in mono-infections. Thus, Ornithodiplostomum spp. development is influenced by conspecifics and heterospecifics. Taken together, my results suggest that naturally co-occurring parasites in spatially segregated infection sites can influence one another’s growth within their shared intermediate host, with possible ecological and evolutionary consequences.en_US
dc.identifier.urihttps://hdl.handle.net/10133/6155
dc.language.isoen_USen_US
dc.proquest.subject0718en_US
dc.proquest.subject0329en_US
dc.proquest.subject0472en_US
dc.proquestyesYesen_US
dc.publisherLethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciencesen_US
dc.publisher.departmentDepartment of Biological Sciencesen_US
dc.publisher.facultyArts and Scienceen_US
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en_US
dc.subjectecologyen_US
dc.subjectparasitologyen_US
dc.subjectco-infectionen_US
dc.subjectparasitismen_US
dc.subjecthost-parasite interactionsen_US
dc.subjecttrematodaen_US
dc.subjectbiodiversityen_US
dc.subjectmultiparasitismen_US
dc.subjectmulti-species infectionen_US
dc.subjectfish parasitesen_US
dc.subjectFathead minnow--Parasites--Researchen_US
dc.subjectFishes--Parasitesen_US
dc.subjectParasites--Behavior--Researchen_US
dc.subjectParasites--Ecology--Researchen_US
dc.subjectHost-parasite relationshipsen_US
dc.subjectTrematoda--Researchen_US
dc.subjectEcologyen_US
dc.subjectParasitologyen_US
dc.subjectParasitismen_US
dc.subjectBiodiversityen_US
dc.subjectDissertations, Academicen_US
dc.titlePatterns of multiparasitism and consequences of co-infection in fathead minnows (Pimephales promelas)en_US
dc.typeThesisen_US
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