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dc.contributor.authorDiggs, Nora Elizabeth
dc.date.accessioned2014-03-04T16:20:44Z
dc.date.available2014-03-04T16:20:44Z
dc.date.issued2008-12
dc.identifier.otherdiggs_nora_e_200812_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/diggs_nora_e_200812_ms
dc.identifier.urihttp://hdl.handle.net/10724/25162
dc.description.abstractThe role of diet in limiting migratory birds during the non-breeding period is poorly understood in part due to the complexities of quantifying food availability and the food consumed by birds. We tracked changes in winter food availability and the diet of the short-distance migratory bird, the Hermit Thrush (Catharus guttatus), in a southeastern mixed hardwood-pine forest. Larger-bodied birds, predominately males, maintained territories with higher arthropod abundance and had a greater proportion of arthropods in their diet. Larger-bodied birds experienced less variation in diet and fat loads over the winter, suggesting that smaller-bodied females gain fat midwinter to cope with unpredictable and lower-quality resources. Contrary to previous research, our results suggest that arthropod density, not fruit abundance, determines territory quality, and that smaller birds are behaviorally excluded from optimal territories. Future research should determine the long-term consequences of food limitation on winter condition and impacts on breeding success and survival.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectHermit Thrush
dc.subjectCatharus guttatus
dc.subjectnonbreeding season
dc.subjecthabitat quality
dc.subjectfood supply
dc.subjectfruit
dc.subjectarthropods
dc.subjectterritory
dc.titleThe role of food availability in the wintering ecology of Hermit Thrushes (Catharus guttatus)
dc.typeThesis
dc.description.degreeMS
dc.description.departmentDaniel B. Warnell School of Forestry and Natural Resources
dc.description.majorForest Resources
dc.description.advisorRobert J. Cooper
dc.description.committeeRobert J. Cooper
dc.description.committeePeter P. Marra
dc.description.committeeRonald Carroll


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