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- W20443279 abstract "Dr. Moira J. van Staaden, Advisor This dissertation concerns phenotypic plasticity of male morphology within South African bladder grasshoppers (Orthoptera: Pneumoroidea) from an individual to the species level. Wings and a large inflated abdomen used for acoustic courtship and communication are characteristic of adult male pneumoroids. However, a secondary (‘alternate’) male morph has been identified in three species, which completely lacks the appearance and associated dispersal and signaling behaviors. These characteristics are shared with three monotypic genera formerly raised to accommodate taxa with atypical males. As the aforementioned characteristics are critical for mate localization, the absence of such structures and behaviors demands explanation. The first chapter examines three pneumoroid species that possess both male morphs to determine how similar the uninflated morph is across taxa. The morphology of each species and morph was compared using Multivariate Analysis of Variance (MANOVA) and linear regression. Results show that the morphological differences between inflated and uninflated males is similar across species. This demonstrates that the uninflated phenotype is largely conserved within the Bullacris genus. The second chapter takes a broader comparative approach. It expands the morphometric analysis to investigate three strictly uninflated species and asks whether they are in fact uninflated morphs of inflated species with which they are sympatric. Based on results from chapter 1, we propose that the known differences between morphs can be used to create ‘hypothetical’ uninflated males for any inflated taxa. MANOVA and Discriminant Function" @default.
- W20443279 created "2016-06-24" @default.
- W20443279 creator A5041429192 @default.
- W20443279 date "2007-01-01" @default.
- W20443279 modified "2023-09-27" @default.
- W20443279 title "Inter- and Intraspecific Variation in the Superfamily Pneumoroidea" @default.
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- W20443279 hasPublicationYear "2007" @default.
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