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dc.contributor.advisor Wilson, Paul S. en Gould, Katherine en 2014-06-05T15:44:46Z en 2014-06-05T15:44:46Z en 2014 en 2014-06-05 en 2014-05 en
dc.identifier.uri en
dc.description Includes bibliographical references (pages 53-56) en
dc.description California State University, Northridge. Department of Biology. en
dc.description.abstract The beetle Trirhabda eriodictyonis lives on two shrubs with different plant defenses: Eriodictyon crassifolium has hairy leaves; E. trichocalyx has sticky leaves. The relationship between these plants and the leaf-eating beetles that depend on them has been unstudied until now. In choice tests, larvae and adults showed unexpected feeding preferences, with larvae from E. crassifolium showing no preference and those from E. trichocalyx preferring E. crassifolium. Adults all strongly preferred eating E. trichocalyx. Larvae and adults that I switched from E. trichocalyx to E. crassifolium died younger than beetles that I continued to feed the original host species. Mating trials showed that the only difference in preference involved males from E. trichocalyx, which were far more attractive to females on E. crassifolium than males on the same host. Finally, females laid more eggs if they ate E. trichocalyx than E. crassifolium, even if they had started life on the latter. It is clear that E. trichocalyx provides benefit to both males and females and these beetle populations are not differentiating based on host plants. Neither the differentiation hypothesis nor the preference-performance hypothesis are validated by this plant-insect interaction. Instead, it appears that the best explanation of this relationship is phylogenetic conservatism. The plant defenses, which appear dramatically different to humans, are unimportant to the beetles. en
dc.description.statementofresponsibility by Katherine Gould en
dc.format application/pdf en
dc.format.extent ix, 56 pages en
dc.language.iso en en
dc.publisher California State University, Northridge en
dc.rights.uri en
dc.subject Geographic mosaic of coevolution en
dc.subject Preference-performance hypothesis en
dc.subject Eriodictyon trichocalyx en
dc.subject Eriodictyon crassifolium en
dc.subject Eriodictyon en
dc.subject Trirhabda eriodictyonis en
dc.subject mate choice en
dc.subject chrysomelidae en
dc.subject coleoptera en
dc.subject host-specificity en
dc.subject.other Dissertations, Academic -- CSUN -- Biology. en
dc.title Host-specificity and its effect on mate choice in a plant-eating beetle en
dc.type Thesis en 2014-06-05T15:44:47Z en
dc.contributor.department Biology en M.S. en
dc.contributor.committeemember Hogue, James N. en
dc.contributor.committeemember Gray, David A. en
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