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dc.contributor.advisorBehmer, Spencer T.en_US
dc.creatorRoeder, Karl Adamen_US
dc.date.accessioned2011-10-21T22:03:37Zen_US
dc.date.accessioned2011-10-22T07:13:50Z
dc.date.available2011-10-21T22:03:37Zen_US
dc.date.available2011-10-22T07:13:50Z
dc.date.created2010-08en_US
dc.date.issued2011-10-21en_US
dc.date.submittedAugust 2010en_US
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8569en_US
dc.description.abstractAll animals, including insect herbivores, eat to acquire nutrients that are essential for fueling physiological processes associated with growth, development, and reproduction. Protein and digestible carbohydrates are two nutrients required in large quantities by insect herbivores, but the amounts in which they occur in plants can be highly variable. In this thesis, I explore how the amounts and ratios of protein and digestible carbohydrate in an insect herbivore's food affect lifetime performance and body elemental composition. I do this by confining a generalist caterpillar, Heliothis virescens, to semi-synthetic foods with fixed protein-carbohydrate amounts and ratios. I show that foods with protein-carbohydrate ratios that match the self-selected protein-carbohydrate intake of final instar caterpillars correlate strongly with best performance, and that small deviations away from this optimal protein-carbohydrate ratio can result in large drop-offs in overall performance, particularly for males. I also show the importance of protein-carbohydrate balance over total macronutrient content. Finally, my results demonstrate that H. virescens caterpillars do not practice strict elemental homeostasis. My result, when contrasted with earlier work on caterpillars, suggests that hemimetabolous and holometabolous insect herbivores practice different degrees of elemental homeostasis.en_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.subjectNutritionen_US
dc.subjectPerformanceen_US
dc.subjectLifetimeen_US
dc.subjectElementsen_US
dc.titleDietary Effect on the Performance and Body Composition of the Generalist Insect Jerbivore, Heliothis virescens (Lepidoptera: Noctuidae)en_US
dc.typeThesisen
thesis.degree.departmentEntomologyen_US
thesis.degree.disciplineEntomologyen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelMastersen_US
dc.contributor.committeeMemberWharton, Robert A.en_US
dc.contributor.committeeMemberRosenthal, Gil G.en_US
dc.type.genrethesisen_US
dc.type.materialtexten_US


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