Effects of diet quality on performance and nutrient regulation in an omnivorous katydid

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dc.contributor.authorPearson, Rachel
dc.contributor.authorBehmer, Spencer
dc.contributor.authorGruner, Daniel
dc.contributor.authorDenno, Robert
dc.date.accessioned2022-05-09T18:19:04Z
dc.date.available2022-05-09T18:19:04Z
dc.date.issued2011
dc.description.abstract1. Omnivores by definition eat both plants and animals. However, little is known about how diet macronutrient content affects omnivore performance, or the extent to which they can regulate macronutrient intake. We assessed these questions using the salt marsh katydid, Conocephalus spartinae Fox (Tettigoniidae). 2. In our first experiment we used artificial diets with different protein–carbohydrate ratios to assess the effects of diet quality on survival, growth, and lipid accumulation. We found that diets with a high protein–carbohydrate ratio negatively affected Conocephalus survival. Among surviving individuals growth was not significantly different across the treatments, but lipid content decreased significantly as the protein–carbohydrate ratio of diets increased. 3. In a second experiment we explored the ability of Conocephalus to regulate their protein–carbohydrate intake. Results revealed that Conocephalus did not feed randomly when presented with two nutritionally complementary foods. A detailed analysis of their protein–carbohydrate intake revealed selection for a protein-biased diet, but a lack of tight regulate of protein–carbohydrate intake. 4. We discuss how key macronutrients can limit omnivores, and how nutritional flexibility may enable omnivores to persist in nutritionally heterogeneous environments.en_US
dc.description.sponsorshipNSF DEB-0638813en_US
dc.identifierhttps://doi.org/10.13016/jpqp-udax
dc.identifier.citationPearson, R.E.G., S.T. Behmer, D.S. Gruner, and R.F. Denno. 2011. Effects of diet quality on performance and nutrient regulation in an omnivorous katydid. Ecological Entomology 36:471-479en_US
dc.identifier.otherhttps://doi.org/10.1111/j.1365-2311.2011.01290.x
dc.identifier.urihttp://hdl.handle.net/1903/28612
dc.language.isoen_USen_US
dc.publisherBlackwellen_US
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtEntomologyen_us
dc.relation.isAvailableAtCollege of Computer, Mathematical & Natural Sciencesen_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.subjectdigestable carbohydratesen_US
dc.subjectfeeding behaviouren_US
dc.subjectforagingen_US
dc.subjectgeometric frameworken_US
dc.subjectnutritionen_US
dc.subjectnutrient regulationen_US
dc.subjectproteinen_US
dc.subjectomnivoreen_US
dc.subjectTettigoniidaeen_US
dc.titleEffects of diet quality on performance and nutrient regulation in an omnivorous katydiden_US
dc.typeArticleen_US

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