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dc.contributor.authorAuld, Stuarten_UK
dc.contributor.authorHall, Spencer Ren_UK
dc.contributor.authorHouslay Ochs, Jessicaen_UK
dc.contributor.authorSebastian, Mathewen_UK
dc.contributor.authorDuffy, Meghan Aen_UK
dc.description.abstractParasite prevalence shows tremendous spatiotemporal variation. Theory indicates that this variation might stem from life-history characteristics of parasites and key ecological factors. Here, we illustrate how the interaction of an important predator and the schedule of transmission potential of two parasites can explain parasite abundance. A field survey showed that a noncastrating fungus (Metschnikowia bicuspidata) commonly infected a dominant zooplankton host (Daphnia dentifera), while a castrating bacterial parasite (Pasteuria ramosa) was rare. This result seemed surprising given that the bacterium produces many more infectious propagules (spores) than the fungus upon host death. The fungus's dominance can be explained by the schedule of within-host growth of parasites (i.e., how transmission potential changes over the course of infection) and the release of spores from "sloppy" predators (Chaoborus spp., who consume Daphnia prey whole and then later regurgitate the carapace and parasite spores). In essence, sloppy predators create a niche that the faster-schedule fungus currently occupies. However, a selection experiment showed that the slower-schedule bacterium can evolve into this faster-schedule, predator-mediated niche (but pays a cost in maximal spore yield to do so). Hence, our study shows how parasite life history can interact with predation to strongly influence the ecology, epidemiology, and evolution of infectious disease.en_UK
dc.publisherUniversity of Chicago Pressen_UK
dc.relationAuld S, Hall SR, Houslay Ochs J, Sebastian M & Duffy MA (2014) Predators and patterns of within-host growth can mediate both among-host competition and the evolution of transmission potential of parasites. American Naturalist, 184 (S1), pp. S77-S90.
dc.rightsThis item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Publisher policy allows this work to be made available in this repository. Published in The American Naturalist, Vol. 184, No. S1, August 2014 by University of Chicago Press. The original publication is available at:
dc.subjectparasitic castratorsen_UK
dc.subjectvirulence evolutionen_UK
dc.subjectparasite competitionen_UK
dc.subjectobligate killersen_UK
dc.titlePredators and patterns of within-host growth can mediate both among-host competition and the evolution of transmission potential of parasitesen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Auldetal2014AmNat.pdf] Publisher requires embargo of 12 months after formal publication.en_UK
dc.citation.jtitleAmerican Naturalisten_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationIndiana Universityen_UK
dc.contributor.affiliationGeorgia Institute of Technologyen_UK
dc.contributor.affiliationGeorgia Institute of Technologyen_UK
dc.contributor.affiliationGeorgia Institute of Technologyen_UK
rioxxterms.apcnot requireden_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorAuld, Stuart|0000-0001-6691-7442en_UK
local.rioxx.authorHall, Spencer R|en_UK
local.rioxx.authorHouslay Ochs, Jessica|en_UK
local.rioxx.authorSebastian, Mathew|en_UK
local.rioxx.authorDuffy, Meghan A|en_UK
local.rioxx.projectInternal Project|University of Stirling|
Appears in Collections:Biological and Environmental Sciences Journal Articles

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