Natal-host environmental effects on juvenile size, transmission success, and operational sex ratio in the entomopathogenic nematode Steinernema carpocapsae

dc.altmetrics.displayfalse
dc.contributor.authorTherese, M.O.
dc.contributor.authorBashey, F.
dc.date.accessioned2014-07-23T20:09:37Z
dc.date.available2014-07-23T20:09:37Z
dc.date.issued2012
dc.description.abstractTrans-host effects can alter the ecological and evolutionary dynamics of parasite and host populations. Here, we examine whether resource limitation within a parasite's natal host affects propagule size and influences parasite fitness in a new host. To alter resource competition, we infected caterpillars with 3 doses of the nematode Steinernema carpocapsae and harvested transmission-stage juveniles either early or late in the infection. We measured the size of these juveniles, and then we examined their ability to colonize and their sex ratio upon maturity in a new host. We found a trade-off between the cumulative number and size of nematodes emerging from a host. Emerging nematode size declined significantly over the time course of the infection, but dose had no significant effects. Larger, early emerging nematodes had greater success in colonizing a new host than smaller, later emerging nematodes, independently of whether they needed to locate the host. Furthermore, although early emerging nematodes resulted in an equal sex ratio in the new host, late emerging nematodes resulted in female-biased populations. These transmission and sex-ratio effects demonstrate that conditions in the natal host can affect parasite fitness, and they suggest that trans-host effects need to be more fully integrated into our studies of parasite populations.
dc.identifier.citationTherese, M. O., & Bashey, F. (2012). Natal-host environmental effects on juvenile size, transmission success, and operational sex ratio in the entomopathogenic nematode Steinernema carpocapsae. Journal of Parasitology, 98(6), 1095-1100. http://dx.doi.org/10.1645/GE-3069.1
dc.identifier.urihttps://hdl.handle.net/2022/18508
dc.language.isoen_US
dc.publisherAmerican Society of Parasitologists
dc.relation.isversionofhttps://doi.org/10.1645/GE-3069.1
dc.rights© 2012 American Society of Parasitologists
dc.subjectcaterpillar
dc.subjectentomopathogenic organism
dc.subjectenvironmental effect
dc.subjectfitness
dc.subjectinfectious disease
dc.subjectjuvenile
dc.subjectnematode
dc.subjectparasite transmission
dc.subjectpropagule
dc.subjectsex ratio
dc.subjectcontrolled study
dc.subjectentomopathogenic nematode
dc.subjectenvironmental factor
dc.subjecthost
dc.subjectmicrobial colonization
dc.subjectnematodiasis
dc.subjectnonhuman
dc.subjectparasite transmission
dc.subjectsex ratio
dc.subjectSteinernema carpocapsae
dc.subjectAnimals
dc.subjectEnvironment
dc.subjectFemale
dc.subjectHost-Parasite Interactions
dc.subjectLarva
dc.subjectMale
dc.subjectMoths
dc.subjectRhabditida
dc.subjectSex Ratio
dc.subjectNematoda
dc.subjectSteinernema carpocapsae
dc.titleNatal-host environmental effects on juvenile size, transmission success, and operational sex ratio in the entomopathogenic nematode Steinernema carpocapsae
dc.typeArticle

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